Best free ChatGPT Agent alternatives

Looking for a free alternative to ChatGPT Agent? Here are 9 general autonomous agents worth trying — 9 with a free tier. ChatGPT Agent itself is paid.

ToolChatGPT Agent (you searched)Kortix (Suna)AutoGPTManus
Pricingfreefreefreemium
Best forOperates its own virtual computer in the cloudOpen-source agent platform (formerly Suna) that runs specialist agents on isolated cloud computersOpen-source platform for building and running continuous AI agentsFully autonomous agent in a cloud sandbox
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ChatGPT Agent alternatives — straight answers

What is the best free alternative to ChatGPT Agent?

Kortix (Suna) is the closest free alternative to ChatGPT Agent: same General Autonomous Agents sub-category, and it is free. Open-source agent platform (formerly Suna) that runs specialist agents on isolated cloud computers

Are there free ChatGPT Agent alternatives?

Yes — 9 of the 9 alternatives listed here are free or freemium: Kortix (Suna), AutoGPT, Manus, Genspark, MiniMax Agent. None of them are paid-only.

Is ChatGPT Agent free?

ChatGPT Agent is paid. That is why this page exists: the free and freemium options are listed first below.

How were these ChatGPT Agent alternatives chosen?

They are the other tools in General Autonomous Agents, then the rest of AI Agents & Automation, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.

All ChatGPT Agent alternatives

Browse General Autonomous Agents →

Kortix (Suna)

General Autonomous Agents
freeNew

✦ WhyA ChatGPT Agent alternative — Open-source agent platform (formerly Suna) that runs specialist agents on isolated cloud computers.

  • Open-source agent platform (formerly Suna) that runs specialist agents on isolated cloud computers
  • Agents produce finished deliverables such as reports and code and return them for human approval
  • Free to self-host; managed cloud is paid
  • Works with your own LLM provider keys
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AutoGPT

General Autonomous Agents
freeNew

✦ WhyA ChatGPT Agent alternative — Open-source platform for building and running continuous AI agents.

  • Open-source platform for building and running continuous AI agents
  • Low-code builder for agent workflows
  • Self-host free
  • One of the most starred AI repos
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Manus

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — Fully autonomous agent in a cloud sandbox.

  • Fully autonomous agent in a cloud sandbox
  • Breaks goals into steps and executes them
  • Web research, code execution and file output
  • 'My Computer' desktop environment
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Genspark

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — 'Super agent' that plans and executes end-to-end.

  • 'Super agent' that plans and executes end-to-end
  • Generates sheets, slides and even phone calls
  • Mixes multiple models and tools
  • Free daily credits
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MiniMax Agent

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — General-purpose autonomous agent from MiniMax, separate from its Hailuo video product.

  • General-purpose autonomous agent from MiniMax, separate from its Hailuo video product
  • Built on MiniMax's M3-series multimodal agentic models
  • Free daily credits; paid credit plans for heavier use
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Flowith

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — Infinite-canvas workspace where every prompt/output is a branchable, reusable node.

  • Infinite-canvas workspace where every prompt/output is a branchable, reusable node
  • Agent Neo: autonomous agent that runs long tasks in the background 24/7
  • Free Starter plan with one-time credits granting access to frontier models (Opus, GPT, Gemini) and Agent Neo
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Skywork AI

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — Five specialized agents for docs, sheets, slides, podcasts and web content in one workspace.

  • Five specialized agents for docs, sheets, slides, podcasts and web content in one workspace
  • DeepResearch-powered output generation across formats
  • Free tier available alongside paid workspace plans
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Ninja AI (NinjaTech)

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — SuperNinja: autonomous agent running on its own dedicated VM for coding, research, website building.

  • SuperNinja: autonomous agent running on its own dedicated VM for coding, research, website building
  • Bundles multiple frontier models behind one subscription with 'Inference Level Optimization'
  • Single agent spans coding, document analysis, and content generation tasks
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HyperWrite AI Agent

General Autonomous Agents
freemium

✦ WhyA ChatGPT Agent alternative — Browser-native personal agent that books, emails, and researches inside your existing tabs.

  • Browser-native personal agent that books, emails, and researches inside your existing tabs
  • Free tier confirmed live plus paid upgrade for higher-volume agent tasks
  • Long-running writing-assistant product line (from OthersideAI) now extended into full agentic tasks
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ChatGPT Agent head-to-head

ChatGPT Agent vs Kortix (Suna)ChatGPT Agent vs AutoGPTChatGPT Agent vs ManusChatGPT Agent vs GensparkChatGPT Agent vs MiniMax AgentChatGPT Agent vs FlowithChatGPT Agent vs Skywork AIChatGPT Agent vs Ninja AI (NinjaTech)