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Freebuff

Imagine a coding agent in your terminal with no subscription, no API key and no card. Freebuff pays for the models with ads shown between agent turns. The catch is in the small print: outside 24 countries you get a limited mode, and your prompts help pick the ads.

We have not run it ourselves: described from the docs and the repository.

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In numbers

countries with full access
Freebucks a day in Russia, Belarus and Israel
models in limited mode
subagents inside

What it is

Freebuff calls itself a free alternative to Claude Code, Codex and Cursor. You install it with one npm command, describe the task in plain words, and the agent finds the relevant files, makes the changes and runs the checks that matter for your project. The work is split between nine subagents: one finds files, another reviews the edits, a third drives a real browser. Advertisers pick up the bill, and a short text ad about cloud or hosting shows up right in the terminal between agent turns.

The free part has a border, and it runs around 24 countries. Russia, Belarus and Israel are not on the full-access list, so there Freebuff runs in limited mode: six fast Flash models from Xiaomi, Zhipu, DeepSeek and Upstage plus an anonymous beta, at 25 Freebucks a day. Claude, GPT and Gemini are not in that set. For a pet project, or to see at no cost how an agent finds its own way around a codebase, that is enough. Work code under an NDA is better kept out of it.

How it works

npm install -g freebuffno key
Needs Node.js 18 or newer on macOS, Windows or Linux. Go to your project folder, run freebuff and type the task. No API key and no card.
file-picker · code-reviewer · browser-use
Subagents split the job: one picks the files, another reviews the changes, a third opens a browser. After every answer three buttons suggest the next step.
Adads
A text ad from a developer-focused sponsor appears between agent turns. It is matched to what you are working on right now.
Freebuckslimit
An in-app currency that buys one-hour model sessions. The US gets 150 a day, Russia, Belarus and Israel get 25. The balance resets at midnight and nothing carries over.

Know before installing

A VPN does not unlock full access. Through a VPN or proxy Freebuff switches on the same limited mode and gives 20 Freebucks instead of 25, and the terms explicitly forbid hiding your country. Breaking that can get the account blocked.
Prompts, code and repository data go to the service's servers. The privacy policy allows deriving interest categories from your prompts and personalising ads with them. Uploaded files and connected repositories are not shared with advertisers.
Two models in the limited set deserve a deliberate choice. DeepSeek V4.1 Flash is marked «May use data for AI training», and Space Bunny Alpha runs at an anonymous provider that retains prompts.
The service itself says «Limits can change»: a model's price in Freebucks follows what it costs to run. Terms and limits change, so check the current ones.
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Also read

722 papers from a closed OpenAI model on math. How many did a machine actually check?October 7, 2026Opting out of training doesn't hide your chat from a reviewer. What can a human at Anthropic see in Claude, and when does a conversation go to the police?October 6, 2026

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