Best free OpenManus alternatives

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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

✦ WhyA OpenManus 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