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Top Free to start & Open-Source AI Coding Tools & Agents
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🚀 Top Free to Start & Open-Source AI Coding Tools & Agents (2026)
⚠️ Security note
Many coding AIs run with elevated permissions (sometimes root).
Always:
- Avoid granting full disk / root access unless absolutely required
- Back up your repo before AI-driven refactors
- Review diffs carefully (AI can and does break working code)
This post covers free, open-source, or high-value AI coding tools including IDE copilots, autonomous agents, CLI tools, app builders, and code-search engines.
⚡ Quick List (Fast Overview)
- Gemini CLI / AI Studio – https://google-gemini.github.io/gemini-cli/
- GitHub Copilot – https://github.com/features/copilot
- OpenCode – https://opencode.ai/
- Google Antigravity – https://antigravity.google/
- Code Web Chat – https://codeweb.chat/
- Windsurf – https://www.windsurf.com/
- Qwen Code – https://github.com/QwenLM/qwen-code
- Llama Coder – https://llamacoder.together.ai/
- Supermaven – https://supermaven.com/
- OpenHands – https://www.all-hands.dev/
- Continue – https://continue.dev/
- Aider – https://aider.chat/
- Open Interpreter – https://github.com/OpenInterpreter/open-interpreter
- AnyCoder – https://huggingface.co/spaces/akhaliq/anycoder
- Vercel AI SDK – https://sdk.vercel.ai/
- Qodo – https://www.qodo.ai/
- Orchids – https://orchids.app/
- v0 (Vercel) – https://v0.app/
- DeepSite – https://huggingface.co/spaces/enzostvs/deepsite
- Bolt.new – https://bolt.new/
- Fragments (E2B) – https://fragments.e2b.dev/
- Rork – https://rork.com/
- Blinky – https://github.com/blinkylabs/blinky
- Bloop – https://bloop.ai/
- BondAI – https://github.com/krohling/bondai
- bumpgen – https://github.com/nikolovlazar/bumpgen
- Automata – https://github.com/emrgnt-cmplxty/automata
- AutoPR – https://github.com/irgolic/AutoPR
- Codestral (Mistral) – https://mistral.ai/technology/#codestral
- Devstral 2 – https://openrouter.ai/mistralai/devstral-2
- Qwen3 Coder – https://openrouter.ai/qwen/qwen3-coder
- Denigma – https://denigma.app/
📚 Detailed Description
Gemini CLI / AI Studio
Google’s Gemini-powered coding assistant.
- Very generous free daily limits
- CLI, IDE, and web usage
- Strong reasoning and refactoring
Best for: General coding, refactors, explanations.
GitHub Copilot
https://github.com/features/copilot
AI pair programmer built into VS Code & JetBrains.
- Free tier with monthly limits
- Strong autocomplete and inline suggestions
Best for: Everyday coding assistance.
OpenCode
Open-source autonomous coding agent.
- Runs locally
- Bring your own API keys
- Privacy-focused
Best for: Agent workflows & automation.
Google Antigravity
Experimental Gemini IDE agent.
- Free preview
- Limits reset every few hours
- Natural-language terminal commands
Best for: Testing next-gen IDE AI.
Code Web Chat
Open-source framework for building coding chat tools.
- No sign-up
- Self-hostable
- Multi-model support
Best for: Building your own coding AI UI.
Windsurf
AI web & app builder.
- Free monthly credits
- Visual builder + prompts
- One deploy/day
Best for: Fast prototypes.
Qwen Code
https://github.com/QwenLM/qwen-code
Alibaba’s open-source CLI coding assistant.
- Free daily requests
- MIT licensed
Best for: Terminal-based workflows.
Llama Coder
https://llamacoder.together.ai/
Free browser-based code generator.
- No sign-up
- Open source
Best for: Quick snippets.
Supermaven
Fast AI autocomplete tool.
- Free tier
- Low-latency suggestions
Best for: Speed-focused coding.
OpenHands
Agentic coding assistant.
- Free local mode
- Optional hosted mode
Best for: Autonomous coding tasks.
Continue
Open-source IDE AI agents.
- Free solo plan
- Custom agent definitions
Best for: Custom IDE workflows.
Aider
Terminal-based AI pair programmer.
- Uses your API keys
- No artificial limits
Best for: Git-based development.
Open Interpreter
https://github.com/OpenInterpreter/open-interpreter
Run code locally using natural language.
- Fully open source
- Executes Python & shell
Best for: Local automation.
AnyCoder
https://huggingface.co/spaces/akhaliq/anycoder
Free open-source “vibe-coding” tool.
- Text & image input
- Generates deployable sites
Best for: UI-driven coding.
Vercel AI SDK
Open-source framework for AI apps.
- Free
- Streaming + tool calling
Best for: AI web apps.
Qodo
AI coding assistant with automation.
- Free monthly credits
- IDE + CLI support
Best for: Reviews & workflows.
Orchids
Text-to-website generator.
- Free monthly tokens
- Exportable code
v0 (Vercel)
Prompt-based UI generator.
- Free credits
- React + Tailwind output
DeepSite
https://huggingface.co/spaces/enzostvs/deepsite
Open-source AI website builder.
- No sign-up
- DeepSeek-powered
Bolt.new
AI web app builder.
- Free tier
- Token-based usage
Fragments (E2B)
AI app sandbox.
- Free usage credits
- Secure execution
Rork
AI app builder with code export.
- Daily free credits
Blinky
https://github.com/blinkylabs/blinky
AI debugging agent for VS Code.
- Open source
- Backend bug fixing
Bloop
Semantic AI code search.
- Natural language search
- Large repo support
BondAI
https://github.com/krohling/bondai
Autonomous code interpreter + API.
- CLI + REST
- Bring your own keys
bumpgen
https://github.com/nikolovlazar/bumpgen
AI dependency upgrade tool.
- Auto-fix breaking changes
Automata
https://github.com/emrgnt-cmplxty/automata
Autonomous GPT-based coding system.
AutoPR
https://github.com/irgolic/AutoPR
AI-generated pull requests.
Codestral (Mistral)
https://mistral.ai/technology/#codestral
Free code-focused LLM (with limits).
Devstral 2
https://openrouter.ai/mistralai/devstral-2
Large agentic coding model (123B).
Qwen3 Coder
https://openrouter.ai/qwen/qwen3-coder
Mixture-of-Experts coding model (480B).
Denigma
AI coding assistant for IDEs.
✅ Final Notes
This list focuses on free access, open source, and high-value tiers.
AI tools change fast — always double-check limits before relying on them.