What is the best free AI coding tool?
Last updated
Short answer: Cline. It is our pick in “Best free / open-source / bring-your-own-key”; runner-up Aider, budget pick Gemini CLI. Cline pricing: Free and open source for individuals; pay for inference at cost or BYOK. Enterprise: contact sales.
Preliminary · based on public infoFree here means free to use: open-source tools where you bring your own model key or local model, or vendors with a real free tier. Model/API costs may still apply with bring-your-own-key tools.
| Tool | Score | What it is | Pricing |
|---|---|---|---|
| Cline | 79 (free / open-source / bring-your-own-key) | Open-source autonomous agent extension for VS Code. | Free and open source for individuals; pay for inference at cost or BYOK. Enterprise: contact sales. Price checked 2026-10-14 |
| Aider | 77 (free / open-source / bring-your-own-key) | Git-aware AI pair programmer in the terminal. | Free and open source (Apache 2.0); bring your own model API key or local model. Price checked 2026-10-14 |
| OpenCode | 76 (free / open-source / bring-your-own-key) | Open-source terminal coding agent. | Free and open source, any provider. Optional OpenCode Zen pay-as-you-go balance (starts at $20). Price checked 2026-10-14 |
| Gemini CLI | 73 (free / open-source / bring-your-own-key) | Open-source terminal agent for Gemini models. | Open source. Free with Google login: 1,000 requests/user/day; free Gemini API key: 250/day; Google AI Pro 1,500/day, Ultra 2,000/day; pay-as-you-go via API/Vertex. Price checked 2026-10-14 |
| Kilo Code | 71 (free / open-source / bring-your-own-key) | Open-source coding agent for VS Code/JetBrains. | Free and open source (BYOK/local, $0); Kilo Gateway pay-as-you-go; Kilo Pass from $19/mo; Teams $15/user/mo; Enterprise custom. Price checked 2026-10-14 |
| Continue | 68 (free / open-source / bring-your-own-key) | Open-source assistant and checks for IDEs and CI. Note: continue.dev says Continue was acquired by Cursor (checked 2026-10-14). | Open-source codebase remains free; Continue has been acquired by Cursor and no paid plans are offered on continue.dev. Price checked 2026-10-14 |
Full ranking with FAQ: Best free / open-source / bring-your-own-key.
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FAQ
What is the best free AI coding tool?
Cline. It is our pick in “Best free / open-source / bring-your-own-key”; runner-up Aider, budget pick Gemini CLI. Cline pricing: Free and open source for individuals; pay for inference at cost or BYOK. Enterprise: contact sales.
Which tools did you compare?
Cline, Aider, OpenCode, Gemini CLI, Kilo Code, Continue.
Are these scores hands-on tested?
Mostly not. Scores are preliminary, based on vendor documentation and public reporting applied to our 100-point rubric; any hands-on runs are published with logs on the tool pages.
Do affiliate commissions affect the answer?
No. Affiliate status is never a scoring input.
Next steps
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Prices link to vendor pages; see how we score.
Free: the AI Coding Cost Cheat Sheet (PDF)
What $0, about $20 and $100+ a month gets you across 30+ AI coding tools, with prices copied from vendor pages (checked Oct 14, 2026). Enter your email to download it now. You'll also get our free weekly email: what shipped and which picks or prices moved, about a 2-minute read. Unsubscribe anytime.