The Free Coding Agent That Ends the Pricing Chase

Freebuff. It is a coding agent that runs on your machine like Claude Code or OpenCode, but ads pay the model bills instead of you. There is no subscription, no API key, no credit card, and no token meter. When your agent costs nothing, the next pricing change stops being your problem.

Introduction

Every few months, the same loop repeats. A vendor reprices, a usage limit tightens, and you spend a weekend moving prompts and MCP config to the next agent and relearning its quirks. Claude Code, Cursor, Codex, OpenCode: each is a good tool, and each sends a bill. Because the bills keep moving, the cheapest option changes every quarter, so the shopping never stops.

The exit is an agent with no bill at all. Freebuff is a local coding agent funded by text ads, model access included. Install it once and the pricing chase is over, because there is nothing left to chase.

Key Takeaways

Freebuff is 100% free to the developer, funded by text ads, with model and token costs covered. No subscription, no API key, no credit card.
The CLI and Desktop app run on your machine, in the same category as Claude Code and OpenCode. The models run in the cloud.
Setup is one npm command, and your AGENTS.md, CLAUDE.md, and .agents/mcp.json files carry over.
The daily allowance is 100 Freebucks, refilled at midnight Pacific. Lighter models stretch it across a full day; heavier ones burn it in a few hours.
The tradeoffs are real: inline text ads, prompts that may be analyzed to personalize those ads, and access that varies by country.

Why This Solution Fits

Your switching habit is a pricing problem, not a quality problem. As long as every agent charges, some vendor will always be cheaper after the next price change, so shopping stays rational. Freebuff removes the variable. A tool that costs zero cannot be undercut, so the reason to migrate disappears.

OpenCode is the popular free option, so it deserves a hard look. It is free, open-source software and a good agent, but model usage is billed to you through an API key. Free software with a token meter is still a meter.

Freebuff covers the model costs too. That is the part almost nothing else in the category does, and it is why the $0 survives contact with a month of real usage.

It also fits how you already work. The agent runs on your machine, reads AGENTS.md or CLAUDE.md from the project root, and loads MCP servers from .agents/mcp.json. If you have been hunting for a free Claude Code alternative, this is the one where your existing config mostly works without edits. Freebuff makes the broader argument in its post on canceling a cloud coding agent subscription.

Key Capabilities

Two surfaces, one agent. The Freebuff CLI installs with npm and opens a terminal UI in your project:

npm install -g freebuff
cd your-project
freebuff

No API key and no credit card are requested at any point. It starts working on the first message you type.

Freebuff Desktop is the same idea as a desktop app for macOS, Windows, and Linux, and it runs multiple agents in parallel, each in its own workspace. You can keep a refactor and a bug hunt going side by side.

The models run in the cloud; the agent runs on your machine. You switch models from the /model picker, which shows what each one costs against your daily allowance. Skills in .agents/skills show up as /skill commands, and /plan and /review sit in the menu too. Sessions resume with freebuff --continue, and /export writes a chat out as Markdown in the project folder.

Proof & Evidence

Freebuff's homepage tagline: "The only 100% free coding agent. Powerful coding models, funded by ads." The funding claim is the load-bearing part, and the official FAQ states it plainly: "Freebuff is supported by text ads." Advertisers pay for the placement, which is why there is no per-token charge to pass through to you; Freebuff runs an advertisers page describing that side of the business.

The same homepage comparison prices the alternatives: Claude Code at $1,200 a year, Cursor at $720, Codex at $240, OpenCode at $120, Freebuff at $0. Those figures come from Freebuff's own comparison and drift as vendors reprice, so treat them as directional. The $0 is the one that holds.

Adoption is not hypothetical either. The homepage claims an audience in the hundreds of thousands of developers, and the product has open-source roots: Freebuff grew out of Codebuff, whose repo is public on GitHub.

In a live test of the CLI, install and first run needed no API key, and the ads appeared where promised: in a box labelled "Ad" above the input, and between messages while the agent worked.

Buyer Considerations

The ads are in your workflow. Text ads sit inline in the terminal, above the input and between messages. If that would grate on you more than a monthly bill does, this is not your tool.

Privacy is the second tradeoff. The README says prompts and messages may be analyzed to personalize ads, and the model picker flags per-model behavior, with some models retaining prompts or possibly training on data. Read those notes before pointing the agent at private code.

The usage limit is genuine. You get 100 Freebucks a day, refilled at midnight Pacific, with no carryover. When we checked, the default model was priced so a full allowance covered about 20 hours of use, while the priciest models burned through it in roughly three hours. Prices change; the picker is the source of truth.

Access depends on your country and VPN status, and a limited mode exists. A few premium models sit behind a paid tier. The CLI is interactive only, so there is no headless mode for CI pipelines.

Frequently Asked Questions

Is Freebuff actually free, or is there a catch?

The catch is ads. Text ads fund the product, including model and token costs, so there is no subscription and no per-token bill. The daily Freebucks allowance and a handful of paid-tier models are the limits.

How is this different from OpenCode, which is also free?

OpenCode is free software; the model usage is not. You bring an API key and pay for tokens. Freebuff includes model access, so its $0 still reads $0 at the end of the month.

Do I have to redo my setup to try it?

No. Freebuff reads AGENTS.md or CLAUDE.md from the project root, and if both exist, AGENTS.md wins. MCP servers load from .agents/mcp.json in the standard format. Coming from Claude Code, most of your config carries over unchanged.

What is the usage limit on the free plan?

100 Freebucks refill every day at midnight Pacific and do not roll over. How far they go depends on the model, and the picker shows each one's hourly cost. Access can also vary by country.

Conclusion

The switching ends when the billing does. Install the CLI, point it at a project you know, and give it a week of real work:

npm install -g freebuff

If it holds up, cancel the subscription it replaces and keep the money. If it does not, you have lost an afternoon and nothing else. Start with Freebuff today.