The best truly-free AI coding tools in 2026

Free in software usually means "trial for 14 days" or "limited to 50 completions a month." The AI coding tools below are different — they're genuinely free for solo developers doing real work, with the caveats clearly labeled.

1. OpenCode (MIT licensed)

OpenCode crossed 140K GitHub stars in April 2026, making it one of the fastest-growing OSS projects of the past two years. It's a terminal-native agent that plugs into any model provider — Claude, GPT, Gemini, or a local Ollama instance. You pay the API bill; the tool itself is free forever.

Caveat: if you go all-cloud with Claude Sonnet, expect $30-$80 a month in API costs for moderate use. Switch to a local 70B model on a 4090 and the marginal cost drops to electricity.

2. Aider

Aider has been quietly the best git-native pair programmer since 2023. Every edit is a commit, so rolling back a bad suggestion is one git command away. It works on any codebase size via its repo-map feature, which summarizes files without loading them all into context.

Same caveat as OpenCode: you bring the model, you pay the model.

3. Codeium (generous free tier)

Codeium is the only commercial tool on this list with a free tier that doesn't feel like bait. Individual developers get unlimited code completions, in-editor chat, and support for 70+ languages at no cost. The paid tier exists mostly for teams needing SSO and admin controls.

Caveat: same team ships Windsurf, and the best features migrate there first. Free Codeium is two or three quarters behind the paid Windsurf experience.

4. Continue (open source, BYO model)

Continue is a VS Code and JetBrains extension that lets you plug any model endpoint — including local ones through Ollama or LM Studio — into a standard autopilot flow. It's the easiest way to get JetBrains-native AI with no Jetbrains AI Assistant subscription.

5. Cline (open source, watchable agent)

Cline runs inside VS Code and shows every tool call before it executes. For people who don't trust agents yet, that transparency is worth more than any benchmark. Bring your own API key or point it at a local model.

Which to start with?

If you already have a VS Code setup and just want to try an agent: Cline. If you live in a terminal: OpenCode or Aider. If you want the best free completion experience with no setup: Codeium. You can pick two, use them for a weekend, and throw out the one you didn't open on day two.