| Agno | Free | Agent Frameworks (Developers) | Open-source (Apache-2.0) Python framework, 41.7k GitHub stars |
| AWS Strands Agents | Free | Agent Frameworks (Developers) | Open-source (6,800+ stars) Python and TypeScript SDK from AWS |
| DSPy | Free | Agent Frameworks (Developers) | Open-source (MIT) framework from Stanford NLP, 37k+ GitHub stars |
| Google Agent Development Kit (ADK) | Free | Agent Frameworks (Developers) | Open-source Python/Java framework from Google for building multi-agent systems |
| Langflow | Free | Workflow Automation | Open source with 138k GitHub stars, free desktop app and free cloud account |
| LangGraph | Free | Agent Frameworks (Developers) | Build stateful, multi-agent apps as graphs |
| LiveKit Agents | Free | Real-Time Voice Agents | Apache-2.0 open-source framework, fully self-hostable on your own servers |
| Mastra | Free | Agent Frameworks (Developers) | Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG |
| MCP Registry (Official) | Free | MCP Ecosystem | The canonical open-source specification and docs for the Model Context Protocol |
| Microsoft AutoGen | Free | Agent Frameworks (Developers) | Multi-agent conversation framework |
| OpenAI Agents SDK | Free | Agent Frameworks (Developers) | Lightweight agent orchestration from OpenAI |
| Pipecat | Free | Real-Time Voice Agents | BSD-2-Clause open-source Python framework for real-time voice/multimodal agents |
| Playwright MCP | Free | Browser & Computer-Use Agents | Official Microsoft MCP server exposing Playwright browser control to any MCP client |
| Pydantic AI | Free | Agent Frameworks (Developers) | Type-safe Python agent framework from the Pydantic team, validated structured outputs |
| smolagents | Free | Agent Frameworks (Developers) | Extremely minimal open-source library (~1,000 lines) from Hugging Face |
| Windmill | Free | Workflow Automation | Open-source, self-hostable with unlimited executions on the free tier |
| Zhipu AutoGLM | Free | General Autonomous Agents | Free foundation-agent system for autonomous GUI control (web + Android) |
| Activepieces | Freemium | Workflow Automation | MIT-licensed, free-forever self-hosted Community Edition with unlimited runs/users/flows |
| Bland AI | Freemium | Real-Time Voice Agents | All-in-one per-minute pricing bundles LLM+STT+TTS with no separate token pass-through charges |
| Botpress | Freemium | Workflow Automation | Free pay-as-you-go plan with a monthly message quota and AI credit |
| Browser Use | Freemium | Browser & Computer-Use Agents | Open-source library to run browser agents locally for free |
| Browserbase | Freemium | Browser & Computer-Use Agents | Free tier: 1 browser-hour/month, 3 concurrent browsers, 3 agent runs |
| Chatbase | Freemium | Workflow Automation | Free plan: 50 message credits/month, 1 AI agent, 1 workspace member |
| Cloudflare MCP | Freemium | MCP Ecosystem | Build and deploy remote MCP servers directly on Cloudflare Workers with built-in OAuth |
| Composio | Freemium | MCP Ecosystem | Managed auth + tool-call infrastructure for agents across 250+ apps |
| Convergence Proxy | Freemium | General Autonomous Agents | Free daily session quota; Pro lifts it to unlimited and adds parallel runs |
| Coze | Freemium | Workflow Automation | No-code drag-and-drop bot/agent builder from ByteDance, distinct from Doubao's consumer chat app |
| Coze Space | Freemium | General Autonomous Agents | ByteDance's general-purpose office agent that breaks tasks into sub-tasks and drives a browser/code editor autonomously |
| CrewAI | Freemium | Agent Frameworks (Developers) | Role-based multi-agent 'crews' |
| Dify | Freemium | Workflow Automation | Open-source Community Edition, free self-deploy via Docker |
| Firecrawl | Freemium | Browser & Computer-Use Agents | Converts any site into clean LLM-ready markdown/structured data |
| Flowith | Freemium | General Autonomous Agents | Infinite-canvas workspace where every prompt/output is a branchable, reusable node |
| Genspark | Freemium | General Autonomous Agents | 'Super agent' that plans and executes end-to-end |
| Glama | Freemium | MCP Ecosystem | Indexes and security-scans thousands of MCP servers for compatibility/safety |
| Gumloop | Freemium | Workflow Automation | No-code canvas for AI workflows |
| HyperWrite AI Agent | Freemium | General Autonomous Agents | Browser-native personal agent that books, emails, and researches inside your existing tabs |
| Letta | Freemium | Agent Memory & RAG-as-a-Service | Free BYOK plan supporting up to 3 stateful agents |
| Lindy | Freemium | Workflow Automation | Build AI 'employees' from plain English |
| LlamaIndex | Freemium | Agent Frameworks (Developers) | Leading framework for RAG and data agents |
| Make | Freemium | Workflow Automation | Visual drag-and-drop automation |
| Manus | Freemium | General Autonomous Agents | Fully autonomous agent in a cloud sandbox |
| Mem0 | Freemium | Agent Memory & RAG-as-a-Service | Free Hobby tier: unlimited end users, 10K add / 1K retrieval requests/month |
| MiniMax Agent | Freemium | General Autonomous Agents | General-purpose autonomous agent from MiniMax, separate from its Hailuo video product |
| n8n | Freemium | Workflow Automation | Open-source, self-hostable automation |
| Ninja AI (NinjaTech) | Freemium | General Autonomous Agents | SuperNinja: autonomous agent running on its own dedicated VM for coding, research, website building |
| Perplexity Comet | Freemium | General Autonomous Agents | AI-native browser with a built-in agent |
| Pipedream | Freemium | Workflow Automation | Free tier: 300 credits/month, 3 active workflows, 3 connected accounts, no card required |
| Ragie | Freemium | Agent Memory & RAG-as-a-Service | Free Developer plan for personal projects/exploration |
| Retell AI | Freemium | Real-Time Voice Agents | Free starting credit with no contract required |
| Skyvern | Freemium | Browser & Computer-Use Agents | Vision+LLM based automation that survives UI/DOM changes (no brittle selectors) |
| Skywork AI | Freemium | General Autonomous Agents | Five specialized agents for docs, sheets, slides, podcasts and web content in one workspace |
| Smithery | Freemium | MCP Ecosystem | Marketplace of 14,000+ hosted MCP servers with one-click connect |
| Stack AI | Freemium | Workflow Automation | Free plan: 500 monthly runs, 2 projects, 1 seat, community Discord support |
| Steel.dev | Freemium | Browser & Computer-Use Agents | Open-source browser API for fleets of cloud browsers |
| Supermemory | Freemium | Agent Memory & RAG-as-a-Service | Free monthly usage allowance plus a Supermemory MCP server |
| Trigger.dev | Freemium | Workflow Automation | Open source (Apache 2.0) with a genuine free tier and unlimited tasks |
| Ultravox | Freemium | Real-Time Voice Agents | Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch |
| Vapi | Freemium | Real-Time Voice Agents | Orchestrates STT/LLM/TTS providers of choice into one low-latency voice-agent pipeline |
| Vellum | Freemium | Workflow Automation | Free builder tier with hosted agent apps, no card required |
| Zapier | Freemium | Workflow Automation | Connect 8,000+ apps with AI agents |
| Zapier MCP | Freemium | MCP Ecosystem | Turns any of Zapier's 9,000+ app integrations into callable MCP tools for any AI client |
| Zep | Freemium | Agent Memory & RAG-as-a-Service | Free plan: 10,000 monthly credits, 2 projects, 200ms retrieval |
| Simular | Trial | Browser & Computer-Use Agents | Sai: always-on computer-use agent operating a private cloud virtual desktop |
| Voiceflow | Trial | Workflow Automation | Visual design canvas for building both voice and chat AI agents from one flow |
| ChatGPT Agent | Paid | General Autonomous Agents | Operates its own virtual computer in the cloud |
| Claude Cowork | Paid | General Autonomous Agents | Runs in the Claude desktop app (Mac/Windows) |