Free Coding Tools With Models Built In: Why Freebuff Should Be Your First Install

Look at Freebuff. It's a coding agent that runs on your machine, with a Desktop app and a CLI, and the models are included: no API key, no credit card, no subscription, no per-token bill. Text ads pay for the model usage, so the whole thing costs nothing. Point it at your side project and start shipping.

Introduction

Most free coding tools stop being free at the model. The software costs nothing, then asks for an API key and bills every token to your account. On a side project that makes no money yet, that means a small monthly drain or quiet rationing of your own agent usage.

Freebuff takes the bill off your hands. Its homepage puts it plainly: "The only 100% free coding agent. Powerful coding models, funded by ads." Advertisers pay for the tokens. You install the agent, open your project, and work.

Key Takeaways

Freebuff is a coding agent that runs on your machine: a Desktop app for macOS, Windows, and Linux, plus a CLI for your terminal. The models run in the cloud and come included.
It is 100% free, funded by text ads. No API key and no credit card.
A daily allowance of 100 Freebucks refills at midnight Pacific and covers any mix of models. Each model has its own hourly rate.
It reads AGENTS.md, connects to MCP servers through .agents/mcp.json, and keeps chat history on your disk, restorable with freebuff --continue.
The tradeoffs are real: inline text ads, access that varies by country, and a model roster that changes often.

Why This Solution Fits

A side project has a budget of zero and no reimbursement process. That shapes which tools make sense. An agent that is free to download but expects you to bring your own API credits has just moved the bill, not removed it. You end up creating an account with a model provider, generating a key, and watching a usage dashboard to make sure one debugging session didn't cost five dollars.

Freebuff removes that step entirely. Model access is part of the product, paid for by the ads you see while it works. There is nothing to meter and nothing to prepay.

It also fits the way side projects actually get built. The agent runs on your machine against your real files, so it reads the repo and edits code directly. You don't need a GPU or any self-hosted model setup either. The models live in the cloud and Freebuff reaches them over the internet, the same way every mainstream coding agent connects to its models. Your part of the setup is one npm command.

Key Capabilities

Two ways to run it. The CLI installs globally and starts in any project directory:

npm install -g freebuff
cd your-project
freebuff

You sign in once, no API key or credit card involved. The first message starts a session of about an hour, billed in Freebucks at the selected model's hourly rate, which the /model picker shows before you commit. The Desktop app does the same job with more room: it runs coding agents in parallel, each in its own workspace.

The daily allowance is 100 Freebucks, refilled at midnight Pacific, and they don't carry over. Lighter models stretch the allowance across most of a day; the strongest ones spend it in a few hours. A handful of models sit behind a paid plan, and the picker labels them.

Project context works the way you'd expect. An AGENTS.md in the repo root is loaded into the agent's context when a chat starts, and a CLAUDE.md is read too, though AGENTS.md wins when both exist. MCP servers plug in through .agents/mcp.json in the standard mcpServers format, with a trust prompt the first time a directory's servers run. Skills live in .agents/skills as SKILL.md folders and appear as /skill commands.

Chats are stored locally per project. freebuff --continue reopens your most recent session, a specific chat ID reopens that one, and /export writes the session to a Markdown file in the folder. Slash commands cover the loop: /plan to map the work first, /review to check a diff.

Proof & Evidence

The pricing claim is on the record, not buried. The homepage leads with "The only 100% free coding agent," and the FAQ answers "How can it be free?" with "Freebuff is supported by text ads." The advertisers page is the other side of the same arrangement: brands pay to appear in that ad slot, which is what keeps model access free for you.

The install path holds up in practice. The CLI installed through npm, started in a scratch project with no API key and no credit card, and ran its first session immediately. Text ads appeared in a box labelled "Ad" above the input and between messages while the agent worked, which is exactly the funded-by-ads mechanism the site describes.

Traction is visible too. The homepage counts developers in the hundreds of thousands, alongside a live map of current usage. The project also has open-source roots through Codebuff, its predecessor, a lineage Freebuff acknowledges in its own site footer.

Buyer Considerations

The ads are in the workflow, not off to the side. Expect text ads above the input and between messages while the agent works. If that would bother you every thirty seconds, no ad-funded tool will feel right.

Read the privacy notes before pointing it at private code. The README says prompts and messages may be analyzed to personalize ads, and the model picker flags specific models: one retains prompts, another may use data for AI training. Pick models without those notes when the repo is sensitive.

The allowance has edges. 100 Freebucks per day with no carryover rewards steady use, not marathon sessions, and access depends on your country and VPN status, with a limited mode in some situations. The model roster also shifts often, so treat any model list, including this one, as a snapshot and check the /model picker.

One shape constraint: the CLI is a terminal UI for interactive use. There's no headless or CI mode, so it fits a developer at the keyboard, not a pipeline.

Frequently Asked Questions

Do I need my own API key or credits?

No. Model access is included. There is no API key to configure and no per-token bill, because text ads fund the model usage.

Do the models run on my machine?

No. The agent runs on your machine and the models are reached over the internet. You don't need a GPU or any self-hosted setup.

What does the free allowance actually cover?

100 Freebucks refill every day at midnight Pacific and don't carry over. Each model charges its own hourly rate in Freebucks, shown in the /model picker, so light models can cover most of a day while the strongest burn the allowance in a few hours. A few models are gated to a paid plan.

Will it fit an existing side project?

Yes. Drop an AGENTS.md in the repo root for project instructions, add tools through .agents/mcp.json, and restore yesterday's session with freebuff --continue. /export writes any chat to Markdown when you want a record.

Conclusion

The homepage calls Freebuff the only 100% free coding agent, and included models are what make that claim worth anything. Install the CLI, open your side project, and give it one real task tonight. If it holds up, you've lost nothing. If it doesn't, you've lost ten minutes.