Completely Free AI Tools (115)

No paid plan attached at all — every tool on this page is listed as free, not as a free trial and not as a free tier that upsells.

115tools listed
115free or freemium
115with no paid plan at all
37sub-categories covered

Completely Free AI Tools — straight answers

What are the best free Completely Free AI Tools?

Flocci AI Tools lists 115 of them, ordered free tiers first: Agno, Ai2 Paper Finder (Asta), Aider, Alibaba Quark AI Assistant and AlphaFold Server. Every one of them is free or has a free tier. Each entry states what it uniquely does rather than a score.

Which of these are completely free?

115 on this page are marked fully free with no paid plan at all: Agno, Ai2 Paper Finder (Asta), Aider, Alibaba Quark AI Assistant and AlphaFold Server. The remaining 0 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up.

How is this list ordered?

Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else.

All 115 tools, free tiers first

Completely Free AI Tools: pricing tier, category and the capability each tool is listed for.
ToolPricingTypeListed for
AgnoFreeAgent Frameworks (Developers)Open-source (Apache-2.0) Python framework, 41.7k GitHub stars
Ai2 Paper Finder (Asta)FreeAcademic ResearchAgentic literature-search tool built by Ai2, now folded into the broader 'Asta' research-agent platform
AiderFreeTerminal & CLI AgentsOpen-source AI pair programmer in your terminal
Alibaba Quark AI AssistantFreeGeneral Purpose Chatbots200M+ existing users of Quark's browser/search app now get a free Qwen3-powered chat assistant
AlphaFold ServerFreeScience & Research AIFree browser-based access to AlphaFold 3-class structure prediction for non-commercial research
alphaXivFreeAcademic ResearchFree overlay for arXiv papers with public discussion/comment threads per paper
Amazon RufusFreeAI Shopping AssistantsEmbedded directly in Amazon app/site for 300M+ customers, no separate signup
AnythingLLMFreeLocal LLM RunnersAll-in-one local RAG and agents app
Arize PhoenixFreeLLM Eval & ObservabilityFully open-source, self-hostable with zero setup via `uvx` (pip/conda also supported)
AWS Strands AgentsFreeAgent Frameworks (Developers)Open-source (6,800+ stars) Python and TypeScript SDK from AWS
AxolotlFreeFine-Tuning & Training FrameworksConfig-file-driven fine-tuning workflow (YAML) covering LoRA, QLoRA, full fine-tuning, preference tuning and RL
Baichuan Bai Xiao Ying (百小应)FreeGeneral Purpose ChatbotsFree consumer assistant from Baichuan, built on the Baichuan 4 base model
Baidu Ernie Bot (Wenxin Yiyan)FreeGeneral Purpose ChatbotsBaidu's flagship consumer chatbot built on its Ernie model family
BoltzFreeScience & Research AIFirst fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed
Chatterbox (Resemble AI)FreeAI Voice & SpeechMIT-licensed, fully open-source TTS/voice-cloning family (Turbo/Nano/Multilingual V3)
Cherry StudioFreeMulti-Model Aggregators & Universal ClientsFree, open-source (AGPL-3.0) desktop client unifying OpenAI, Claude, Gemini, DeepSeek, Qwen and local Ollama/LM Studio models in one window
ClineFreeTerminal & CLI AgentsOpen-source autonomous coding agent for VS Code
CrushFreeTerminal & CLI AgentsTerminal coding agent from Charm with LSP-aware context
DaydreamFreeAI Shopping AssistantsProprietary fashion-trained AI understands cut/color/occasion, not generic product search
DeepSeek ModelsFreeNotable Open ModelsOpen V3-series and R1 reasoning models
DeepWikiFreeAI Docs & Codebase Q&AAuto-generates conversational, up-to-date wikis for any public GitHub repo
Design ArenaFreeLeaderboards & BenchmarksCrowdsourced Bradley-Terry (Elo-style) ranking of AI models specifically on design/aesthetic quality, not raw capability
DoclingFreeAI OCR & Document ExtractionMIT-licensed, 64.7k GitHub stars, IBM Research-originated, now under LF AI & Data Foundation
DSPyFreeAgent Frameworks (Developers)Open-source (MIT) framework from Stanford NLP, 37k+ GitHub stars
Epoch AIFreeLeaderboards & BenchmarksIndependent, non-vendor research institute tracking AI compute, training cost and capability trends over time
EXAONE (LG AI Research)FreeNotable Open ModelsEXAONE 4.5: LG's first open-weight vision-language model for industrial use cases
Falcon (TII)FreeNotable Open ModelsFalcon H1 hybrid transformer-Mamba architecture for efficient long-context inference
Falcon LLM Chat (TII)FreeGeneral Purpose ChatbotsFree public playground for Abu Dhabi TII's open-weight Falcon models
Gemini CLIFreeTerminal & CLI AgentsOpen-source terminal agent from Google
Gemma (Google)FreeNotable Open ModelsGoogle's lightweight open models (Gemma 4)
GenesisFreeRobotics & Embodied AIUnified multi-physics simulation engine plus photorealistic renderer for robotics/embodied-AI training, fully open source
Genmo (Mochi 1)FreeAI Video GenerationFully open-source text-to-video model (Mochi 1) with downloadable weights
Google Agent Development Kit (ADK)FreeAgent Frameworks (Developers)Open-source Python/Java framework from Google for building multi-agent systems
Google LearnLMFreeAI Tutors & LearningLearning-tuned tutoring in Gemini
Google MusicFXFreeAI Music & AudioFree instrumental music from Google Labs
GooseFreeTerminal & CLI AgentsOpen-source agent (now under Agentic AI Foundation/Linux Foundation) usable as CLI, desktop app or API
GPT-OSS (OpenAI)FreeNotable Open ModelsOpenAI's open-weight reasoning models
GPT4AllFreeLocal LLM RunnersPrivate local chat with your documents
GuideGeekFreeTravel Planning1M+ consumer users per vendor, live since April 2023 (longer track record than most AI trip tools)
HuggingChatFreeGeneral Purpose ChatbotsCompletely free and open-source
Hunyuan (Tencent)FreeNotable Open ModelsOpen-weight large text MoE models (Hunyuan A13B/Hy3 series) with permissive commercial license
Hunyuan Image (Tencent)FreeAI Image GenerationOpen-sourced 80B-parameter MoE text-to-image model (weights on Hugging Face)
Hunyuan3D-2 (Tencent)Free3D & CAD GenerationOpen-weight two-stage shape generation + high-res texture synthesis pipeline
IBM GraniteFreeNotable Open ModelsApache 2.0 licensed enterprise-grade model family
Jais ChatFreeGeneral Purpose ChatbotsBilingual Arabic/English chatbot built on Jais 30B/70B, the leading Arabic-trained LLM family
JanFreeLocal LLM RunnersOpen-source, offline ChatGPT alternative
KimiFreeGeneral Purpose ChatbotsFree access to Kimi K2-series agentic models
KoboldCppFreeLocal LLM RunnersShips as a single portable executable with a bundled web UI (KoboldAI Lite)
Kokoro TTSFreeAI Voice & SpeechOnly 82M parameters yet ranks near top of the TTS Arena leaderboard for quality
LangflowFreeWorkflow AutomationOpen source with 138k GitHub stars, free desktop app and free cloud account
LangGraphFreeAgent Frameworks (Developers)Build stateful, multi-agent apps as graphs
LeRobot (Hugging Face)FreeRobotics & Embodied AIOpen PyTorch library for training real-world robot control policies (ACT, Diffusion Policy, VLA models)
LibreChatFreeMulti-Model Aggregators & Universal ClientsFully open-source, self-hostable ChatGPT-style interface connecting to OpenAI, Anthropic, Gemini, Bedrock, OpenRouter and more from one UI
LiveKit AgentsFreeReal-Time Voice AgentsApache-2.0 open-source framework, fully self-hostable on your own servers
Llama (Meta)FreeNotable Open ModelsMeta's flagship open-weight family (Llama 4)
LLaMA-FactoryFreeFine-Tuning & Training FrameworksZero-code Web UI (LLaMA Board) for fine-tuning 100+ open models without writing training scripts
llama.cppFreeLocal LLM RunnersPure C/C++ inference engine with minimal dependencies, runs on CPU-only hardware
LM StudioFreeLocal LLM RunnersPolished desktop GUI for local models
LMArena (Arena.ai)FreeLeaderboards & BenchmarksCrowd-voted 'Battle Mode' blind head-to-head comparisons across text, image, and coding/agent models
marimoFreeAI Data AnalystsReactive Python notebook stored as plain .py files, git-friendly
MarkerFreeAI OCR & Document ExtractionApache-2.0 code, 38.7k GitHub stars, converts PDFs/DOCX/PPTX/XLSX to markdown/JSON
MastraFreeAgent Frameworks (Developers)Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG
MCP Registry (Official)FreeMCP EcosystemThe canonical open-source specification and docs for the Model Context Protocol
Meta AIFreeGeneral Purpose ChatbotsFree, powered by Llama 4
Microsoft AutoGenFreeAgent Frameworks (Developers)Multi-agent conversation framework
MiniMax M2 (open weights)FreeNotable Open ModelsOpen-weight MoE text/reasoning model line distinct from MiniMax's Hailuo video product already listed
Mistral Open Models (Magistral, Devstral, Voxtral)FreeNotable Open ModelsDevstral: open coding-agent model tuned for SWE-bench-style tasks
MLX-LM (Apple)FreeLocal LLM RunnersPurpose-built for Apple Silicon's unified memory architecture, faster than llama.cpp for many models on Mac
MorphicFreeAI Search & Answer EnginesOpen-source, Apache 2.0, self-hostable generative-UI search engine
Nemotron (NVIDIA)FreeNotable Open ModelsNVIDIA's open post-trained/distilled model family built on Llama and NVIDIA's own architectures
NVIDIA Isaac GR00TFreeRobotics & Embodied AIOpen, Apache-2.0-licensed vision-language-action foundation model for generalist humanoid robots (GR00T N1.7)
NVIDIA ParakeetFreeSpeech & Transcription EnginesTops the Hugging Face Open ASR Leaderboard with 6.05% average WER at 0.6B params
OllamaFreeLocal LLM RunnersThe default way to run LLMs locally
OLMo (Ai2)FreeNotable Open ModelsOnly major model family shipping full pretraining data (Dolma), code and intermediate checkpoints, not just weights
olmOCRFreeAI OCR & Document ExtractionApache 2.0 open-source OCR toolkit from Ai2, 19.3k GitHub stars
Open WebUIFreeLocal LLM RunnersSelf-hosted ChatGPT-style interface
OpenAI Agents SDKFreeAgent Frameworks (Developers)Lightweight agent orchestration from OpenAI
OpenAI WhisperFreeSpeech & Transcription EnginesOpen-source speech-to-text, run locally free
OpenCodeFreeTerminal & CLI AgentsFully open-source terminal/IDE/desktop coding agent, MIT licensed
OpenEvidenceFreeHealthcare & ClinicalPoint-of-care medical answers with citations
OpenHandsFreeAutonomous Coding AgentsSelf-hosted control center for coding agents with GUI, CLI and SDK surfaces
Opera Browser AI (Aria)FreeBrowser Extensions & CopilotsFree, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed
PandasAIFreeAI Data AnalystsOpen-source Python library: ask natural-language questions over dataframes/CSVs/warehouses
PerplexicaFreeAI Search & Answer EnginesMIT-licensed, fully self-hostable open-source Perplexity clone
Phi (Microsoft)FreeNotable Open ModelsMIT-licensed small language models optimized for on-device and edge deployment
PhiaFreeAI Shopping AssistantsChrome extension + iOS app that surfaces resale/secondhand alternatives while shopping
Pi (Inflection AI)FreeGeneral Purpose ChatbotsFully free personal-AI chatbot with no subscription tier at all — unlimited conversations, no paywall
PicLumenFreeAI Image GenerationGenuinely free image generation
PipecatFreeReal-Time Voice AgentsBSD-2-Clause open-source Python framework for real-time voice/multimodal agents
Playwright MCPFreeBrowser & Computer-Use AgentsOfficial Microsoft MCP server exposing Playwright browser control to any MCP client
PleiasFreeNotable Open ModelsFully open-weight, open-dataset small language models (350M-3B) explicitly built for EU AI Act compliance
Pydantic AIFreeAgent Frameworks (Developers)Type-safe Python agent framework from the Pydantic team, validated structured outputs
Qwen (Alibaba)FreeNotable Open ModelsState-of-the-art open MoE models (Qwen3.x)
Qwen ChatFreeGeneral Purpose ChatbotsFree access to Qwen3-series models
Qwen CodeFreeTerminal & CLI AgentsOpen-source terminal CLI adapted from Gemini CLI, tuned for Qwen3-Coder models
ResearchRabbitFreeAcademic ResearchVisual citation-network mapping across 310M+ papers
RiffusionFreeAI Music & AudioFree, unlimited song generation
Sakana ChatFreeGeneral Purpose ChatbotsFree general-public chat service from Sakana AI, built on its own Namazu model
Sarvam IndusFreeGeneral Purpose ChatbotsFree (beta) chat assistant natively handling all 22 official Indian languages plus Hinglish code-switching
SciraFreeAI Search & Answer EnginesFree, no credit card required
Semantic ScholarFreeAcademic ResearchFully free AI-powered search across 237M+ scientific papers
SGLangFreeLocal LLM RunnersRadixAttention for automatic prefix-cache reuse across requests
smolagentsFreeAgent Frameworks (Developers)Extremely minimal open-source library (~1,000 lines) from Hugging Face
Stable Diffusion (Stability AI)FreeAI Image GenerationOpen-source, run locally for unlimited free use
STORM (Stanford)FreeDeep Research & DocumentsMIT-licensed open-source system that researches a topic and writes a full cited report
SWE-benchFreeLeaderboards & BenchmarksThe standard benchmark for evaluating autonomous coding agents on real GitHub issue resolution
TRELLIS (Microsoft)Free3D & CAD GenerationOpen-weight model outputting radiance fields, 3D Gaussians AND meshes from one representation
UnslothFreeFine-Tuning & Training FrameworksFine-tunes LLMs, diffusion, TTS and embedding models 2x faster with ~70% less VRAM than standard Hugging Face training
Vanna AIFreeAI Database & SQL CopilotsFully open-source text-to-SQL agent, self-hostable with no vendor lock-in
vLLMFreeLocal LLM RunnersPagedAttention memory management for high-throughput multi-request GPU serving
VoidFreeAI IDEs & EditorsFully open-source VS Code fork alternative to Cursor/Windsurf
WhisperXFreeSpeech & Transcription Engines70x real-time transcription speed via batched inference on top of Whisper
WindmillFreeWorkflow AutomationOpen-source, self-hostable with unlimited executions on the free tier
ZeroFreeEmail, Scheduling & TasksFully open-source (MIT license), self-hostable AI email client
Zhipu AutoGLMFreeGeneral Autonomous AgentsFree foundation-agent system for autonomous GUI control (web + Android)

Agno

Agent Frameworks (Developers)
free
  • Open-source (Apache-2.0) Python framework, 41.7k GitHub stars
  • AgentOS: FastAPI-based production runtime for deploying agents
  • Control-plane UI for monitoring live agent systems across clouds
Visit

Ai2 Paper Finder (Asta)

Academic Research
free
  • Agentic literature-search tool built by Ai2, now folded into the broader 'Asta' research-agent platform
  • Free to use, iteratively expands/narrows search based on natural-language queries
  • Built on Semantic Scholar's corpus
Visit

Aider

Terminal & CLI Agents
free
  • Open-source AI pair programmer in your terminal
  • Git-aware commits and edits
  • Works with any model (bring your key)
  • Free to use
Visit

Alibaba Quark AI Assistant

General Purpose Chatbots
free
  • 200M+ existing users of Quark's browser/search app now get a free Qwen3-powered chat assistant
  • Handles deep research, presentations, image generation and medical-info lookup in one app
  • Voice and text chatbot modes built into a mainstream consumer surface, not a standalone chat site
Visit

AlphaFold Server

Science & Research AI
free
  • Free browser-based access to AlphaFold 3-class structure prediction for non-commercial research
  • Predicts structure/interactions of proteins, DNA, RNA, ligands in one model
  • Backed by the AlphaFold Protein Structure Database of 200M+ predicted structures
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alphaXiv

Academic Research
free
  • Free overlay for arXiv papers with public discussion/comment threads per paper
  • Personalized research feed and researcher-follow system
  • Browser extension and MCP server for agent integration
Visit

Amazon Rufus

AI Shopping Assistants
free
  • Embedded directly in Amazon app/site for 300M+ customers, no separate signup
  • 60% of heavy Amazon users now use it per Amazon-reported data; 149% YoY MAU growth
  • Users convert 2.74x more than non-Rufus shoppers per Amazon
Visit

AnythingLLM

Local LLM Runners
free
  • All-in-one local RAG and agents app
  • Chat with your docs privately
  • Works with local or cloud models
  • Free and open-source
Visit

Arize Phoenix

LLM Eval & Observability
free
  • Fully open-source, self-hostable with zero setup via `uvx` (pip/conda also supported)
  • Combines tracing, evals, datasets, experiments and prompt playground in one local-first tool
  • AI engineering agent (PXI) built in for automated troubleshooting of traces
Visit

AWS Strands Agents

Agent Frameworks (Developers)
free
  • Open-source (6,800+ stars) Python and TypeScript SDK from AWS
  • Steering handlers/hooks that catch agent mistakes before execution
  • Native Bedrock and AWS AgentCore integration, plus any-LLM support
Visit

Axolotl

Fine-Tuning & Training Frameworks
free
  • Config-file-driven fine-tuning workflow (YAML) covering LoRA, QLoRA, full fine-tuning, preference tuning and RL
  • Broad multi-model and multimodal training support with GPU-efficiency optimizations built in
  • Popular choice for reproducible post-training recipes shared across the open-model community
Visit

Baichuan Bai Xiao Ying (百小应)

General Purpose Chatbots
free
  • Free consumer assistant from Baichuan, built on the Baichuan 4 base model
  • Multi-turn AI search plus document/image upload and voice interaction
  • Distinct from Baichuan's 2026 pivot to medical LLMs (M3/M4) — this is the general consumer app
Visit

Baidu Ernie Bot (Wenxin Yiyan)

General Purpose Chatbots
free
  • Baidu's flagship consumer chatbot built on its Ernie model family
  • One-stop office/study assistant positioning (办公学习一站解决)
  • Tied into Baidu Search and Baidu ecosystem services
Visit

Boltz

Science & Research AI
free
  • First fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed
  • Boltz-2 adds binding-affinity prediction, not just structure
  • Hostable free via community web apps (e.g. Tamarind Bio) or run locally
Visit

Chatterbox (Resemble AI)

AI Voice & Speech
free
  • MIT-licensed, fully open-source TTS/voice-cloning family (Turbo/Nano/Multilingual V3)
  • Built-in watermarking for responsible-AI provenance on generated audio
  • Paralinguistic tags ([laugh], [cough]) for expressive, non-flat speech
Visit

Cherry Studio

Multi-Model Aggregators & Universal Clients
free
  • Free, open-source (AGPL-3.0) desktop client unifying OpenAI, Claude, Gemini, DeepSeek, Qwen and local Ollama/LM Studio models in one window
  • 300+ models across 50+ providers behind a single chat interface, no per-provider app-switching
  • Built-in RAG knowledge base — chat directly with imported PDF/Word/Excel/Markdown files or web URLs
Visit

Cline

Terminal & CLI Agents
free
  • Open-source autonomous coding agent for VS Code
  • Plan/Act modes with approvals
  • Bring your own API key or model
  • MCP tool support
Visit

Crush

Terminal & CLI Agents
free
  • Terminal coding agent from Charm with LSP-aware context
  • Cross-platform incl. Android/BSD, MCP server support over HTTP/stdio/SSE
  • Agent Skills standard support for extensibility
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Daydream

AI Shopping Assistants
free
  • Proprietary fashion-trained AI understands cut/color/occasion, not generic product search
  • Search across 10,000+ vetted brands and 2M+ items
  • First third-party app to integrate Apple Visual Intelligence for shopping (Nov 2025)
Visit

DeepSeek Models

Notable Open Models
free
  • Open V3-series and R1 reasoning models
  • Efficient MoE, low-cost inference
  • Strong math and code
  • Free open weights
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DeepWiki

AI Docs & Codebase Q&A
free
  • Auto-generates conversational, up-to-date wikis for any public GitHub repo
  • Built by Cognition (Devin) — ask natural-language questions about a codebase's architecture
  • Free to browse/query indexed repos, integrates with Devin for private repo indexing
Visit

Design Arena

Leaderboards & Benchmarks
free
  • Crowdsourced Bradley-Terry (Elo-style) ranking of AI models specifically on design/aesthetic quality, not raw capability
  • Separate leaderboards for Website, UI Component, Game Dev, Data Viz, 3D, Image, Video and Logo generation
  • Real-time rankings from user votes across 140+ countries rather than a fixed static benchmark
Visit

Docling

AI OCR & Document Extraction
free
  • MIT-licensed, 64.7k GitHub stars, IBM Research-originated, now under LF AI & Data Foundation
  • Advanced PDF layout + table structure recognition, local execution
  • Exports to Markdown/HTML/JSON, integrates with LangChain/LlamaIndex
Visit

DSPy

Agent Frameworks (Developers)
free
  • Open-source (MIT) framework from Stanford NLP, 37k+ GitHub stars
  • Compiles/optimizes prompts automatically against metrics instead of manual prompt tuning
  • Production use at Databricks, Shopify, Dropbox, AWS; Shopify reports ~550x cost reduction
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Epoch AI

Leaderboards & Benchmarks
free
  • Independent, non-vendor research institute tracking AI compute, training cost and capability trends over time
  • Maintains FrontierMath and the Epoch Capabilities Index, benchmarks designed to resist saturation/gaming
  • Interactive Data Explorers covering 3,200+ tracked models, data centers, chips and companies, free to browse
Visit

EXAONE (LG AI Research)

Notable Open Models
free
  • EXAONE 4.5: LG's first open-weight vision-language model for industrial use cases
  • 33B flagship plus FP8/AWQ quantized variants for efficient local deployment
  • Backed by LG's enterprise/manufacturing domain tuning
Visit

Falcon (TII)

Notable Open Models
free
  • Falcon H1 hybrid transformer-Mamba architecture for efficient long-context inference
  • Falcon Mamba: pure state-space model variant, no attention layers
  • Free commercial use under TII's permissive open license
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Falcon LLM Chat (TII)

General Purpose Chatbots
free
  • Free public playground for Abu Dhabi TII's open-weight Falcon models
  • Falcon-H1 Arabic leads the Open Arabic LLM Leaderboard across model sizes
  • Fully open-source, permissively licensed models downloadable from Hugging Face
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Gemini CLI

Terminal & CLI Agents
free
  • Open-source terminal agent from Google
  • Huge free daily model quota
  • Built-in tools and MCP support
  • Great value for everyday coding
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Gemma (Google)

Notable Open Models
free
  • Google's lightweight open models (Gemma 4)
  • Runs in as little as 16GB RAM
  • On-device and multimodal variants
  • Free and open
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Genesis

Robotics & Embodied AI
free
  • Unified multi-physics simulation engine plus photorealistic renderer for robotics/embodied-AI training, fully open source
  • 30,000+ GitHub stars, actively updated as recently as Aug 2026
  • Pythonic API designed to be dramatically faster than prior simulators for RL/robot-policy training
Visit

Genmo (Mochi 1)

AI Video Generation
free
  • Fully open-source text-to-video model (Mochi 1) with downloadable weights
  • Runnable locally / self-hostable, no vendor lock-in
  • Free browser playground for quick testing
Visit

Google Agent Development Kit (ADK)

Agent Frameworks (Developers)
free
  • Open-source Python/Java framework from Google for building multi-agent systems
  • Native integration with Vertex AI Agent Engine and Gemini models
  • Model-agnostic — works with non-Google LLMs via LiteLLM
Visit

Google LearnLM

AI Tutors & Learning
free
  • Learning-tuned tutoring in Gemini
  • Guided Learning and study modes
  • Step-by-step explanations & quizzes
  • Free with Gemini
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Google MusicFX

AI Music & Audio
free
  • Free instrumental music from Google Labs
  • DJ mode for evolving loops
  • Quick, no-signup experimentation
  • Great for background tracks
Visit

Goose

Terminal & CLI Agents
free
  • Open-source agent (now under Agentic AI Foundation/Linux Foundation) usable as CLI, desktop app or API
  • 70+ MCP extensions, 15+ LLM providers supported
  • Apache-2.0 licensed, built in Rust
Visit

GPT-OSS (OpenAI)

Notable Open Models
free
  • OpenAI's open-weight reasoning models
  • Run locally or self-host
  • Configurable reasoning effort
  • Free, permissive license
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GPT4All

Local LLM Runners
free
  • Private local chat with your documents
  • Runs on modest laptops
  • LocalDocs RAG built in
  • Free and open-source
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GuideGeek

Travel Planning
free
  • 1M+ consumer users per vendor, live since April 2023 (longer track record than most AI trip tools)
  • Partners with 60-70 tourism boards to power destination-specific conversational AI
  • Built by travel publisher Matador Network, not a pure AI startup
Visit

HuggingChat

General Purpose Chatbots
free
  • Completely free and open-source
  • Switch between top open models (Llama, Qwen, DeepSeek…)
  • Web search and tools enabled
  • Community assistants
Visit

Hunyuan (Tencent)

Notable Open Models
free
  • Open-weight large text MoE models (Hunyuan A13B/Hy3 series) with permissive commercial license
  • Hunyuan3D line for fast image-to-3D generation (under 1 second)
  • Hy-MT translation models covering dozens of language pairs
Visit

Hunyuan Image (Tencent)

AI Image Generation
free
  • Open-sourced 80B-parameter MoE text-to-image model (weights on Hugging Face)
  • Watermark-free output with long-prompt support and strong world-knowledge grounding
  • Released/open-sourced Jan 2026, actively maintained by Tencent
Visit

Hunyuan3D-2 (Tencent)

3D & CAD Generation
free
  • Open-weight two-stage shape generation + high-res texture synthesis pipeline
  • State-of-the-art open 3D generation from Tencent Hunyuan lab
  • Runs locally via Diffusers/ComfyUI integrations
Visit

IBM Granite

Notable Open Models
free
  • Apache 2.0 licensed enterprise-grade model family
  • Hybrid Mamba/transformer architecture (Granite 4) for lower memory footprint
  • Built-in focus on governance, provenance and enterprise compliance
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Jais Chat

General Purpose Chatbots
free
  • Bilingual Arabic/English chatbot built on Jais 30B/70B, the leading Arabic-trained LLM family
  • Trained on 475B+ Arabic tokens, culturally and linguistically tuned rather than translated
  • Free web and mobile app with model choice (fast 30B vs precise 70B vs K2-Diamond-Chat for math/code)
Visit

Jan

Local LLM Runners
free
  • Open-source, offline ChatGPT alternative
  • No-config, privacy-first GUI
  • Runs fully on your device
  • Free forever
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Kimi

General Purpose Chatbots
free
  • Free access to Kimi K2-series agentic models
  • Excellent long-document understanding
  • Open weights, strong on agentic tasks
  • Built-in research and browsing
Visit

KoboldCpp

Local LLM Runners
free
  • Ships as a single portable executable with a bundled web UI (KoboldAI Lite)
  • Generates text, image, video and speech from one local app
  • Runs on CPU or GPU with no installation required
Visit

Kokoro TTS

AI Voice & Speech
free
  • Only 82M parameters yet ranks near top of the TTS Arena leaderboard for quality
  • Apache 2.0 license — fully free for commercial use, weights open on Hugging Face
  • Trained on a shoestring budget, the cheapest-to-reproduce competitive TTS model
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Langflow

Workflow Automation
free
  • Open source with 138k GitHub stars, free desktop app and free cloud account
  • Drag-and-drop visual builder for agents and RAG pipelines on top of LangChain primitives
  • Deep integrations across major LLMs, vector DBs and Google Cloud/Slack/MongoDB
Visit

LangGraph

Agent Frameworks (Developers)
free
  • Build stateful, multi-agent apps as graphs
  • Human-in-the-loop and durable execution
  • Works with any LLM
  • Open-source with a hosted platform
Visit

LeRobot (Hugging Face)

Robotics & Embodied AI
free
  • Open PyTorch library for training real-world robot control policies (ACT, Diffusion Policy, VLA models)
  • Direct integration with Hugging Face Hub for sharing datasets and pretrained robot policies
  • Works with low-cost hobbyist robot arms (SO-100/101), not just simulation
Visit

LibreChat

Multi-Model Aggregators & Universal Clients
free
  • Fully open-source, self-hostable ChatGPT-style interface connecting to OpenAI, Anthropic, Gemini, Bedrock, OpenRouter and more from one UI
  • Built-in Agents, MCP support, Code Interpreter and Artifacts — enterprise-grade features free to self-host
  • 41.7k GitHub stars and active development as of Aug 2026, with secure multi-user auth for team deployments
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LiveKit Agents

Real-Time Voice Agents
free
  • Apache-2.0 open-source framework, fully self-hostable on your own servers
  • Native WebRTC client support across web/mobile/telephony out of the box
  • Native Model Context Protocol (MCP) support for tool-using voice agents
Visit

Llama (Meta)

Notable Open Models
free
  • Meta's flagship open-weight family (Llama 4)
  • Multimodal and long-context variants
  • Run locally or via any host
  • Free, permissive license
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LLaMA-Factory

Fine-Tuning & Training Frameworks
free
  • Zero-code Web UI (LLaMA Board) for fine-tuning 100+ open models without writing training scripts
  • Supports full-tuning, LoRA, 2/3/4/5/6/8-bit QLoRA, DPO, PPO, GaLore and PiSSA in one framework
  • Used internally by Amazon, NVIDIA and Aliyun for open-model post-training
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llama.cpp

Local LLM Runners
free
  • Pure C/C++ inference engine with minimal dependencies, runs on CPU-only hardware
  • Powers the GGUF format used by Ollama, LM Studio and most local runners under the hood
  • Broad quantization support (2-bit to 8-bit) for running large models on consumer hardware
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LM Studio

Local LLM Runners
free
  • Polished desktop GUI for local models
  • Discover, download and chat with GGUF models
  • Local server with OpenAI-compatible API
  • Free for personal use
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LMArena (Arena.ai)

Leaderboards & Benchmarks
free
  • Crowd-voted 'Battle Mode' blind head-to-head comparisons across text, image, and coding/agent models
  • The most-cited human-preference leaderboard in the industry, referenced in nearly every model launch announcement
  • Rebranded from LMArena to Arena.ai in 2026, now also covering agent and design-to-code leaderboards
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marimo

AI Data Analysts
free
  • Reactive Python notebook stored as plain .py files, git-friendly
  • Built-in SQL cells over Polars/Pandas/DuckDB
  • AI-native editor with inline edit/completion, 22k+ GitHub stars
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Marker

AI OCR & Document Extraction
free
  • Apache-2.0 code, 38.7k GitHub stars, converts PDFs/DOCX/PPTX/XLSX to markdown/JSON
  • 76.0% accuracy on the olmocr-bench benchmark
  • Runs on GPU, CPU, or Apple Silicon; optional LLM-boosted accuracy mode
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Mastra

Agent Frameworks (Developers)
free
  • Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG
  • Drops directly into existing React/Next.js apps or runs standalone
  • Built-in workflow engine with suspend/resume and human-in-the-loop steps
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free
  • The canonical open-source specification and docs for the Model Context Protocol
  • Reference server/client SDKs and the official server registry
  • Backed across the ecosystem — Claude, ChatGPT, VS Code, Cursor, MCPJam all implement it
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Meta AI

General Purpose Chatbots
free
  • Free, powered by Llama 4
  • Built into WhatsApp, Instagram & Messenger
  • Image generation and editing in chat
  • Real-time web answers
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Microsoft AutoGen

Agent Frameworks (Developers)
free
  • Multi-agent conversation framework
  • Event-driven, async agent design
  • Studio UI for prototyping
  • Fully open-source
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MiniMax M2 (open weights)

Notable Open Models
free
  • Open-weight MoE text/reasoning model line distinct from MiniMax's Hailuo video product already listed
  • Actively iterated through 2026 (M2.1, M2.5, M2.7 checkpoints)
  • Competitive on agentic coding and tool-use benchmarks among open Chinese models
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MLX-LM (Apple)

Local LLM Runners
free
  • Purpose-built for Apple Silicon's unified memory architecture, faster than llama.cpp for many models on Mac
  • Built-in LoRA/QLoRA fine-tuning support, not just inference
  • Direct Hugging Face Hub integration for pulling and pushing quantized models
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Morphic

AI Search & Answer Engines
free
  • Open-source, Apache 2.0, self-hostable generative-UI search engine
  • 9k+ GitHub stars, actively maintained
  • Pluggable model (OpenAI/Anthropic/Gemini/Ollama) and search backends (Tavily/Brave/Exa)
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Nemotron (NVIDIA)

Notable Open Models
free
  • NVIDIA's open post-trained/distilled model family built on Llama and NVIDIA's own architectures
  • Includes top-ranked open embedding models (Nemotron Embed, Llama-Embed-Nemotron)
  • OpenReasoning-Nemotron: distilled reasoning models for local/edge inference
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NVIDIA Isaac GR00T

Robotics & Embodied AI
free
  • Open, Apache-2.0-licensed vision-language-action foundation model for generalist humanoid robots (GR00T N1.7)
  • Opened to all developers worldwide Apr 2026 (previously partner-only), running on DGX Cloud
  • Full pipeline: pretrained model + simulation fine-tuning + deployment tools, not just a research checkpoint
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NVIDIA Parakeet

Speech & Transcription Engines
free
  • Tops the Hugging Face Open ASR Leaderboard with 6.05% average WER at 0.6B params
  • CC-BY-4.0 license, free for commercial and non-commercial use
  • RTFx ~3,386 — extremely fast inference relative to accuracy
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Ollama

Local LLM Runners
free
  • The default way to run LLMs locally
  • One command to run Llama, Qwen, DeepSeek…
  • OpenAI-compatible local API
  • Free and open-source
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OLMo (Ai2)

Notable Open Models
free
  • Only major model family shipping full pretraining data (Dolma), code and intermediate checkpoints, not just weights
  • Olmo 3 ships Base, Think, and Instruct variants at 7B/32B
  • OlmoCore training framework and Open Instruct pipeline are also open source
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olmOCR

AI OCR & Document Extraction
free
  • Apache 2.0 open-source OCR toolkit from Ai2, 19.3k GitHub stars
  • Vision-language-model based, handles equations/tables/multi-column layout
  • Runs at a fraction of commercial OCR cost on a 7B model
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Open WebUI

Local LLM Runners
free
  • Self-hosted ChatGPT-style interface
  • Works with Ollama and OpenAI-compatible APIs
  • RAG, tools and multi-user
  • Free and open-source
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OpenAI Agents SDK

Agent Frameworks (Developers)
free
  • Lightweight agent orchestration from OpenAI
  • Agent handoffs, guardrails and tracing
  • Tool and function calling built in
  • Open-source, pay only for model usage
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OpenAI Whisper

Speech & Transcription Engines
free
  • Open-source speech-to-text, run locally free
  • 99+ languages and translation
  • Robust to accents and noise
  • Powers countless apps
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OpenCode

Terminal & CLI Agents
free
  • Fully open-source terminal/IDE/desktop coding agent, MIT licensed
  • Bring-your-own model across 75+ providers, free models included
  • Parallel agent sessions with shareable session links
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OpenEvidence

Healthcare & Clinical
free
  • Point-of-care medical answers with citations
  • Grounded in peer-reviewed literature
  • Free for verified clinicians
  • Fast clinical decision support
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OpenHands

Autonomous Coding Agents
free
  • Self-hosted control center for coding agents with GUI, CLI and SDK surfaces
  • Enterprise deployment controls over models, data access and auditability
  • MIT licensed, 83.9k GitHub stars, very active commit history
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Opera Browser AI (Aria)

Browser Extensions & Copilots
free
  • Free, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed
  • Powered by a mix of OpenAI GPT and Google Gemini models under the hood
  • 2025-2026 upgrade added faster models, higher usage limits and access to open-source local models
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PandasAI

AI Data Analysts
free
  • Open-source Python library: ask natural-language questions over dataframes/CSVs/warehouses
  • MIT-licensed core, 23.7k GitHub stars
  • Multi-dataframe queries plus Docker sandbox for safe code execution
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Perplexica

AI Search & Answer Engines
free
  • MIT-licensed, fully self-hostable open-source Perplexity clone
  • Runs with local LLMs via Ollama or cloud providers
  • Uses SearxNG for private, ad-free web search
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Phi (Microsoft)

Notable Open Models
free
  • MIT-licensed small language models optimized for on-device and edge deployment
  • Phi-4-mini and Phi-4-multimodal handle text, vision and audio in one small model
  • Distributed via Azure AI Foundry, Hugging Face, and Ollama
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Phia

AI Shopping Assistants
free
  • Chrome extension + iOS app that surfaces resale/secondhand alternatives while shopping
  • 300K-500K+ downloads within its first year per multiple 2026 reports
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Pi (Inflection AI)

General Purpose Chatbots
free
  • Fully free personal-AI chatbot with no subscription tier at all — unlimited conversations, no paywall
  • Voice mode with 8 selectable voices, plus iOS/Android/web/Apple Messages clients
  • Tuned for supportive, conversational tone rather than task-completion, a distinct niche from utility chatbots
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PicLumen

AI Image Generation
free
  • Genuinely free image generation
  • No watermarks on outputs
  • Multiple art and realism models
  • Simple, fast interface
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Pipecat

Real-Time Voice Agents
free
  • BSD-2-Clause open-source Python framework for real-time voice/multimodal agents
  • Supports distributed multi-agent systems with handoffs over a shared bus
  • Maintained by Daily with an active plugin ecosystem for STT/LLM/TTS providers
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Playwright MCP

Browser & Computer-Use Agents
free
  • Official Microsoft MCP server exposing Playwright browser control to any MCP client
  • Uses accessibility snapshots instead of screenshots/vision, faster and more deterministic
  • 36k+ GitHub stars, Apache-2.0 licensed
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Pleias

Notable Open Models
free
  • Fully open-weight, open-dataset small language models (350M-3B) explicitly built for EU AI Act compliance
  • Trained exclusively on the 2-trillion-token open Common Corpus, not scraped/licensed text
  • Purpose-built RAG models (Pleias-RAG-350M/1B) with built-in citation tracking, Apache 2.0 licensed
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Pydantic AI

Agent Frameworks (Developers)
free
  • Type-safe Python agent framework from the Pydantic team, validated structured outputs
  • Model-agnostic (OpenAI, Anthropic, Gemini, Groq, Mistral, local)
  • Built-in dependency injection and streaming; pairs with Pydantic Logfire for observability
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Qwen (Alibaba)

Notable Open Models
free
  • State-of-the-art open MoE models (Qwen3.x)
  • Top-tier coding and multilingual skills
  • Runs on a single high-RAM Mac
  • Free open weights
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Qwen Chat

General Purpose Chatbots
free
  • Free access to Qwen3-series models
  • Strong multilingual and coding performance
  • Open weights you can also run locally
  • Vision, web search and artifacts
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Qwen Code

Terminal & CLI Agents
free
  • Open-source terminal CLI adapted from Gemini CLI, tuned for Qwen3-Coder models
  • OpenAI-SDK compatible for flexible model backends
  • Free npm install, agentic coding workflows
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ResearchRabbit

Academic Research
free
  • Visual citation-network mapping across 310M+ papers
  • Zotero integration for reference management
  • Used by 1M+ researchers at Harvard/Stanford/MIT/Oxford, free to sign up
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Riffusion

AI Music & Audio
free
  • Free, unlimited song generation
  • Open-source roots
  • Vocals and instrumentals
  • No credit card required
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Sakana Chat

General Purpose Chatbots
free
  • Free general-public chat service from Sakana AI, built on its own Namazu model
  • Real-time web search integration and three selectable tones including a distinct 'Osaka' dialect style
  • Launched March 2026 as Sakana's pivot from pure R&D into consumer products alongside Marlin and Fugu
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Sarvam Indus

General Purpose Chatbots
free
  • Free (beta) chat assistant natively handling all 22 official Indian languages plus Hinglish code-switching
  • Built on Sarvam's own 105B parameter model, not a foreign-model wrapper
  • Voice, document upload and web research included at no cost during beta
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Scira

AI Search & Answer Engines
free
  • Free, no credit card required
  • Open-source (git.new/scira)
  • Multi-mode search: web, Reddit, academic papers, video, fact-check
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Semantic Scholar

Academic Research
free
  • Fully free AI-powered search across 237M+ scientific papers
  • Semantic Reader augmented-reading tool for papers
  • Free public API used by many other research tools
Visit

SGLang

Local LLM Runners
free
  • RadixAttention for automatic prefix-cache reuse across requests
  • Day-0 support for newly released open models (e.g. Kimi K3) among the fastest of any runner
  • Scales from single GPU to distributed multi-node clusters with speculative decoding
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smolagents

Agent Frameworks (Developers)
free
  • Extremely minimal open-source library (~1,000 lines) from Hugging Face
  • CodeAgent paradigm: agents write actions as executable code, not JSON
  • Model-agnostic and modality-agnostic (text, vision, audio) with sandboxed execution via E2B/Docker/Modal
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free
  • Open-source, run locally for unlimited free use
  • Huge ecosystem of models and LoRAs
  • ControlNet for precise composition
  • Foundation of countless AI art tools
Visit

STORM (Stanford)

Deep Research & Documents
free
  • MIT-licensed open-source system that researches a topic and writes a full cited report
  • Perspective-guided simulated conversations to deepen research before writing
  • Co-STORM variant adds human-AI collaborative curation
Visit

SWE-bench

Leaderboards & Benchmarks
free
  • The standard benchmark for evaluating autonomous coding agents on real GitHub issue resolution
  • Multiple official variants (Verified, Multimodal, Multilingual, Lite) for different evaluation needs
  • Companion tooling (SWE-agent, mini-SWE-agent) for running the benchmark yourself, fully open
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TRELLIS (Microsoft)

3D & CAD Generation
free
  • Open-weight model outputting radiance fields, 3D Gaussians AND meshes from one representation
  • Up to 2B parameters, trained on 500K 3D asset dataset
  • MIT-licensed, deployable locally or on Azure
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Unsloth

Fine-Tuning & Training Frameworks
free
  • Fine-tunes LLMs, diffusion, TTS and embedding models 2x faster with ~70% less VRAM than standard Hugging Face training
  • Free Google Colab notebooks let anyone fine-tune open models like Llama/Qwen/GLM on a free T4 GPU
  • Supports LoRA, QLoRA, full fine-tuning, GRPO and DPO reinforcement/preference tuning in one library
Visit

Vanna AI

AI Database & SQL Copilots
free
  • Fully open-source text-to-SQL agent, self-hostable with no vendor lock-in
  • Multi-turn conversational querying across Postgres, Snowflake, BigQuery, MySQL, SQLite and more
  • Agent memory (hosted vector DB) that improves query accuracy over time
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vLLM

Local LLM Runners
free
  • PagedAttention memory management for high-throughput multi-request GPU serving
  • Supports 200+ model architectures with an OpenAI-compatible API server
  • Originated at UC Berkeley Sky Computing Lab, now the de facto standard for self-hosted production LLM serving
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Void

AI IDEs & Editors
free
  • Fully open-source VS Code fork alternative to Cursor/Windsurf
  • Bring-your-own-key to any model, no proprietary backend routing
  • Agent Mode, Gather Mode and inline chat built in
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WhisperX

Speech & Transcription Engines
free
  • 70x real-time transcription speed via batched inference on top of Whisper
  • Adds wav2vec2 forced alignment for accurate word-level timestamps Whisper lacks natively
  • Built-in speaker diarization and VAD preprocessing to cut hallucinations
Visit

Windmill

Workflow Automation
free
  • Open-source, self-hostable with unlimited executions on the free tier
  • Turns scripts (Python/TS/Go/Bash/SQL) into flows and full internal apps
  • Kubernetes/Docker/Fargate deployable with a hybrid seat+compute enterprise pricing model
Visit

Zero

Email, Scheduling & Tasks
free
  • Fully open-source (MIT license), self-hostable AI email client
  • AI agents/LLMs built into the mail workflow, not bolted on
  • 10.7k+ GitHub stars, active 2025-2026 development
Visit

Zhipu AutoGLM

General Autonomous Agents
free
  • Free foundation-agent system for autonomous GUI control (web + Android)
  • Voice-to-action: controls entire web/phone UI from a spoken instruction
  • AutoGLM Rumination adds deep-research style multi-step task execution
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