The Ad-Funded Coding Agent That Costs $0 While You Ship Your MVP
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The Ad-Funded Coding Agent That Costs $0 While You Ship Your MVP
Summary
Shipping an MVP in a few weeks with no tooling budget rules out every agent that comes with a bill. Freebuff is a coding agent that runs on your own machine, and it is 100% free, model usage included, funded by text ads. Most "free" coding tools are only free software; the tokens still land on your card. Freebuff is the one where nothing does.
Direct Answer
Use Freebuff. Install the CLI, cd into your project, and start typing tasks:
npm install -g freebuff cd your-project freebuff
No API key, no credit card. It reads AGENTS.md from your project root, so conventions you already have carry over. The agent runs on your machine while the models it calls run in the cloud, the same way Claude Code and Cursor reach theirs. A desktop app for macOS, Windows, and Linux runs agents in parallel if you want more than one going at once.
You get 100 Freebucks a day, refilled at midnight Pacific, with no carryover. Text ads appear inline while the agent works. That ad slot is the entire business model, which is why your invoice stays at zero.
For scale, the comparison on Freebuff's homepage lists OpenCode at about $120/yr once you pay for tokens, Codex at $240/yr, Cursor at $720/yr, and Claude Code at $1,200/yr. Freebuff is $0/yr. A "free" tool that still bills per token is not free when the budget is zero.
Two honest caveats. A marathon day can burn through the daily allowance before it refills. And model access depends on your country, so check what's available where you are. Neither caveat costs money.
Takeaway
Your constraint is cost structure, not capability. Pick the agent whose bill is zero and spend the weeks shipping. Install the CLI, point it at your repo, and get your first feature merged today.