Free Coding Agents Worth Trying Before You Commit to a Subscription

Try Freebuff first. It is a coding agent that runs on your machine, and it is 100% free because ads cover the model costs, so there is no subscription and no token bill to regret in three months. Then compare it against OpenCode, which is free software but still charges you separately for model usage.

Introduction

Subscriptions punish slow decisions in both directions. Pay annually for the wrong agent and you spend three months rationing a tool that does not fit. Wait too long and you keep paying full price for a tool you barely open. Freebuff's homepage comparison puts Claude Code at $1,200 a year and Cursor at $720, so a wrong pick is an expensive one.

The free route flips the risk. You run real work through a free agent, note where it holds up and where it doesn't, and only then decide whether any paid plan earns your money. Freebuff is the strongest starting point because it is free end to end, model costs included.

Key Takeaways

Freebuff is a local coding agent (Desktop and CLI) that is 100% free. Text ads fund the models, so there is no subscription and no per-token charge.
OpenCode is free, open-source software, but you pay the model API bill separately, which is where the real cost lives.
Freebuff's homepage comparison lists Codex at $240/yr, Cursor at $720/yr, and Claude Code at $1,200/yr, against Freebuff at $0.
The free tier gives you 100 Freebucks a day, refilled at midnight Pacific, and heavier models burn through the allowance faster.
A week of real repository work costs nothing and tells you more than any pricing page.

Why This Solution Fits

The regret you are trying to avoid has a specific shape. Claude Code and Cursor sell annual tiers, so a mismatch locks in for twelve months. OpenCode avoids the subscription but hands you the token bill, which most developers underestimate until the first month of heavy agent use.

Freebuff removes the commitment instead of reselling it. Text ads pay for the models, so trying it costs $0 and staying costs $0. It sits in the same category as Claude Code and OpenCode: the agent runs on your machine and the models run in the cloud. You get a real agent with a different business model, not a demo with a countdown timer.

That makes the comparison cheap in a way no trial does. Install it this week, run your actual backlog through it, and the subscription question either answers itself or disappears. If Freebuff covers your workload, you never have to pick. If it doesn't, you have lost a week, not a year.

Key Capabilities

The Freebuff CLI installs in one command and runs in your terminal:

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 rate shown in the /model picker. The agent reads AGENTS.md or CLAUDE.md from the project root and loads MCP servers from .agents/mcp.json. Skills in .agents/skills show up as slash commands. Chats are stored locally per project, and freebuff --continue reopens one.

Ads show up inline while the agent works, in a box labelled "Ad" above the input and between messages. That is the trade: a little screen space in exchange for the entire model bill.

Freebuff Desktop runs on macOS, Windows, and Linux and runs coding agents in parallel, each in its own workspace. Same deal: no API key, no credit card.

Model choice is part of the comparison. The daily 100 Freebucks can be spent across a mix of models, and the roster changes often enough that the /model picker is the only reliable source for current names and rates. Some models are gated to a paid plan.

Proof & Evidence

Freebuff's homepage calls it "the only 100% free coding agent," and its FAQ states the funding plainly: Freebuff is supported by text ads. The ads are visible in the product itself, in a box labelled "Ad" inside the CLI while the agent works.

The project has open-source roots via Codebuff on GitHub, and the homepage reports hundreds of thousands of developers joined, with a live map of current usage.

On price, Freebuff's own homepage comparison lists OpenCode at $120/yr, Codex at $240/yr, Cursor at $720/yr, and Claude Code at $1,200/yr, against Freebuff at $0. Those figures change, so check the live page before quoting them. The shape of the comparison holds either way: every alternative bills you directly, Freebuff bills advertisers.

Buyer Considerations

The free tier has edges you should test against. The 100 daily Freebucks do not carry over, and a heavy model can consume the whole allowance in a few hours. Access also depends on your country and VPN status, and a limited mode exists.

There are data tradeoffs. The CLI documentation says prompts and messages may be analyzed to personalize ads, and some models note that data may be used for training. Check the privacy policy and the notes in the /model picker before pointing the agent at private code, and pick models without those notes for sensitive work.

Budget the test across several days. If your normal day is eight hours of agent time, one day of allowance will not cover it on the heavier models, and unused Freebucks vanish at midnight. The CLI is a terminal UI only, with no scripted or CI mode. If you need unlimited usage on a specific frontier model, a paid subscription may still be the right answer. The difference is that you can verify that with a week of evidence instead of a hunch.

Frequently Asked Questions

Is Freebuff really 100% free?

Yes. Text ads fund it, including the model and token costs. You never enter a credit card or an API key, and the daily Freebucks allowance refills every day.

How is that different from OpenCode being free?

OpenCode is free, open-source software, but it connects to models with your own API key, so you pay the token charges. Freebuff covers the model costs too, which is the part that usually gets expensive.

What should I test during a free week?

Hand it a refactor you have been putting off. Set up AGENTS.md first so it follows your project's rules, and add an MCP server if you use one. Then watch whether the daily allowance covers your pace.

Do I need a fast machine or a local model?

No. The agent runs on your machine and the models run in the cloud, the same way Claude Code, Cursor, and OpenCode reach their models. There is no Ollama-style setup to maintain.

Conclusion

You have three months of regret to avoid and a free way to avoid it. Install the CLI, run it on your real backlog for a week, and watch whether the daily allowance and the model quality hold up. If Freebuff covers your work, you never have to pick a subscription. If it doesn't, you will know exactly what to pay for instead. Start at freebuff.com.