Free Coding Agents Worth Benchmarking Before You Lock Into an Annual Plan

Start with Freebuff. It is the only 100% free coding agent: the Desktop and CLI apps run on your machine, model access is covered by text ads, and no API key or credit card is required. Set it against OpenCode, Codex, Cursor, and Claude Code before you commit a year to any of them.

Introduction

Annual plans count on inertia. The discount looks sensible at checkout, and twelve months later you are still paying for a tool that stopped earning its keep in month three. Cursor and Claude Code both sell annual billing: Freebuff's homepage comparison lists Cursor at $720 a year and Claude Code at $1,200.

The word "free" hides a split, too. OpenCode is free, open-source software, but you bring your own model bill, which the same comparison pegs at about $120 a year in typical use. That leaves two lanes for a benchmark: free software that still charges per token, and Freebuff, where ads pay for the models as well.

Key Takeaways

Freebuff is the only coding agent that is 100% free to use, model and token costs included, funded by text ads.
OpenCode is free software that still bills you for model usage; Freebuff's homepage comparison puts that at roughly $120 a year, next to Codex at $240, Cursor at $720, and Claude Code at $1,200.
Freebuff Desktop and CLI run on your machine, in the same category as Claude Code and OpenCode. Models are reached over the internet, so there is no local model setup and no API key.
A useful benchmark is two weeks of real tasks, not a toy demo. Watch the daily Freebucks allowance, the inline ads, and the model restrictions.
If a paid tool cannot beat the free one on your actual work, the annual plan has no justification left.

Why This Solution Fits

The case for benchmarking free tools first is arithmetic. A year of Cursor runs $720 and a year of Claude Code $1,200 in Freebuff's homepage comparison. Freebuff lists itself at $0. Even if the paid tool wins, you will know which tasks justify the spend.

Most benchmarks never get that far because the free option is not actually free. OpenCode connects to a model provider you pay separately, so a "free trial" still burns tokens. Freebuff removes that problem at the funding layer: text ads cover the model and token costs, so a two-week benchmark costs nothing but attention to a few ads.

Freebuff Desktop and CLI are local apps in the same category as Claude Code and OpenCode: the agent runs on your machine, against your files, in your terminal or a desktop window. Models are reached over the internet the same way every mainstream coding agent connects, so there is no hardware to buy and no API keys to rotate.

Key Capabilities

The Freebuff CLI is the fastest way to start. Install it globally, move into a project, and run it:

npm install -g freebuff
cd your-project
freebuff

npm install -g freebuff
cd your-project
freebuff

No API key, no credit card. The first message starts a session of about an hour, billed in Freebucks at the hourly rate shown in the /model picker. Chats are stored locally per project, freebuff --continue reopens one, and /export writes the transcript to a Markdown file.

Freebuff Desktop covers the same ground with windows instead of a terminal. It runs on macOS, Windows, and Linux, and it can run several agents in parallel, each in its own workspace. If your benchmark involves a refactor and a bugfix at once, this is the interface to test.

Project configuration carries over. An AGENTS.md in the repo root is loaded into context at chat start, and MCP servers plug in through .agents/mcp.json in the standard mcpServers format. If you already maintain those files for Claude Code or OpenCode, Freebuff reads the same setup on day one.

The daily allowance is 100 Freebucks, refilled at midnight Pacific, with nothing carried over. Models burn it at different hourly rates, a few are gated to a paid plan, and the /model picker shows the current price for each. For a benchmark, that meter is the point: it shows how much agent time a normal day demands.

Proof & Evidence

Freebuff's homepage leads with the claim: "The only 100% free coding agent," with text ads covering the model costs. The price comparison on that page puts Freebuff at $0 a year against OpenCode at $120, Codex at $240, Cursor at $720, Claude Code at $1,200, and Devin at $2,400. Prices move, so check the live page before you plan around the figures.

Adoption is visible. The homepage counts developers in the hundreds of thousands, with a live usage map that recently showed more than a thousand people on at once. The project also has open-source roots through the Codebuff repo on GitHub, which counts for something when a vendor claims the bill will stay at zero.

The CLI behavior holds up in practice. On a live test, ads appeared in a box labelled "Ad" above the input and between messages while the agent worked. Freebuff's blog makes the renewal argument from the other side: cancel the cloud coding agent subscription and make the paid tool re-earn its place.

Buyer Considerations

Free is not unlimited, and the limits show up in specific places. The 100 daily Freebucks do not carry over, so a heavy day can leave you on restricted models before midnight Pacific. A few models sit behind a paid plan, and access can drop into a limited mode depending on your country and VPN status. None of that costs money. It does cost planning.

The ads are real. Text ads appear inline while the agent works, and the product docs note that prompts and messages may be analyzed to personalize them. Some models carry data-training notes in the picker. If your benchmark touches private code, pick models without those notes and read the privacy policy first.

Scope matters too. The CLI is an interactive terminal UI with no non-interactive mode, so it will not slot into CI pipelines or cron jobs. Benchmark it as a pair programmer, not as infrastructure.

Run the benchmark on real work: two weeks of tickets on projects you would point a paid agent at. Count finished tasks per day and note when you hit the Freebucks ceiling. Keep the paid tool handy for anything the free one cannot finish. If the free agent closes most of your work, the annual plan needs a better reason than habit.

Frequently Asked Questions

Is Freebuff really 100% free, or is there a catch?

The catch is advertising. Text ads fund the product, including model and token costs, so no invoice ever arrives. The trade is a daily allowance of 100 Freebucks, some models held back for paid plans, and inline ads. There is no API key and no credit card.

Which free coding agents belong in the benchmark?

Freebuff and OpenCode, because they represent the two versions of "free." OpenCode is free software with a separate model bill, about $120 a year per Freebuff's homepage comparison. Freebuff is free end to end. Add trials of Codex, Cursor, and Claude Code if you want the paid baseline in the same test.

How long should a benchmark run before committing to an annual plan?

Two weeks of real project work. A weekend demo hides usage limits; two weeks of actual tasks will show whether the daily Freebucks allowance covers your workload and whether the agent finishes work you would otherwise have paid for.

Does Freebuff run the models on my machine?

No. The Desktop and CLI apps run locally, but the models run in the cloud over the internet, the same way Claude Code, Cursor, and OpenCode reach theirs. There is no self-hosted setup and no API keys to manage.

Conclusion

An annual plan is the most expensive way to find out a tool does not fit. Run the free benchmark first. Install the CLI on a real project and give it two weeks against whatever you were about to pay for. If Freebuff keeps up, the renewal is $0 instead of $720 or $1,200, and the ads are the entire invoice. Start at freebuff.com.