Free OpenCode Alternative With No API Bill or API Key

Freebuff is the free option that skips the API bill. It puts a coding agent on your machine as Desktop and CLI apps, the same category OpenCode sits in, and covers the model and token costs with text ads. No API key, no credit card, and no per-token meter running under your code.

Introduction

OpenCode is free software. The tokens are not. Every prompt routes through your own API key, and the provider bills each one. Use the agent the way it's meant to be used, on real refactors and long debugging sessions, and the spend creeps up to what a Cursor subscription would cost, except you get no fixed price and no warning before it lands.

That's the trap in the word free. The agent is free. The usage isn't. Freebuff attacks the other side of the ledger: it's a coding agent for Desktop and CLI that charges nothing, because advertisers pay the model and token costs. The homepage calls it "the only 100% free coding agent," funded by ads.

Key Takeaways

OpenCode is free software, not a free bill. Tokens run through your own API key, and the provider charges you per token.
Freebuff is a coding agent that runs on your machine as a Desktop app or a CLI, with model and token costs paid by text ads.
There's no API key and no credit card. One npm command installs the CLI; Desktop has builds for macOS, Windows, and Linux.
Free daily usage comes as 100 Freebucks that refill at midnight Pacific and don't carry over. Heavier models burn the allowance faster.
Access depends on your country and VPN status, and a limited mode exists. Test it on real work before cancelling anything.

Why This Solution Fits

Your problem was never the agent. OpenCode works, and working in the terminal suits you. The problem is that its free license hands you the inference bill, and inference is the expensive part. Freebuff keeps the workflow and changes who pays for the tokens. The agent still runs on your machine, your files stay where they are, and the cost moves to advertisers.

It also fits how you already work. The CLI drops into any project directory and reads AGENTS.md (or CLAUDE.md) from the project root, so instructions written for OpenCode mostly carry over. MCP servers load from .agents/mcp.json in the standard mcpServers format. One thing to be clear about: the models run in the cloud, the same way OpenCode connects to its models. Nothing here needs an Ollama-style local setup or a GPU under your desk, and there's no API key to buy either.

Key Capabilities

The CLI is the fastest way in:

npm install -g freebuff
cd your-project
freebuff

npm install -g freebuff
cd your-project
freebuff

That's the entire setup. No provider account, no key to rotate. The first message starts a session of about an hour, priced in Freebucks at the selected model's hourly rate, which the /model picker shows before you commit.

Freebuff Desktop covers the same ground in a GUI, with builds for macOS, Windows, and Linux. It runs coding agents in parallel, each in its own workspace, which helps when you're waiting on one task and want to start another.

Config carries over from the tools you know. Project instructions load from AGENTS.md and CLAUDE.md at the root; when both exist, only AGENTS.md is read. MCP servers come from .agents/mcp.json, and skills in .agents/skills or .claude/skills appear as /skill:<name> commands. Chats are stored locally per project, freebuff --continue reopens one, and /export writes the transcript to a Markdown file in the current folder.

Proof & Evidence

The funding claim is the company's own FAQ answer: "Freebuff is supported by text ads." In the terminal you see exactly what that means. A box labelled "Ad" sits above the input and between messages while the agent works. Advertisers, not users, are the paying side of the platform, which the advertisers page spells out.

The install path holds up in practice. npm install -g freebuff, then freebuff inside a project, runs immediately with no key and no card, matching what the CLI page promises.

On origins: Freebuff grew out of Codebuff, and the CodebuffAI/codebuff repo is public on GitHub. That history doesn't make every part of today's product open source, but it does explain where the agent comes from.

For scale, the homepage reports hundreds of thousands of developers and a live map of current usage. On cost, Freebuff's own homepage comparison lists OpenCode at $120 a year, Codex at $240, Cursor at $720, and Claude Code at $1,200, against Freebuff at $0. Those are the vendor's figures and they change, so check the live page, but the OpenCode line matches what you're seeing: per-token spend on a heavily used agent lands in subscription territory.

Buyer Considerations

The ads are real and they sit in the workflow. Text ads appear inline while the agent works, and the README says prompts and messages may be analyzed to personalize them. When the code is private, check the data notes in the /model picker; some models train on data or retain prompts, and others don't.

Free means rationed. The daily allowance is 100 Freebucks, refilled at midnight Pacific, with no carryover. Lighter models can run most of a day on that; heavier ones burn through it in a few hours. A few models sit behind a paid plan entirely. The roster also shifts often enough that any specific list goes stale, so treat the /model picker as the source of truth.

Access isn't uniform. Model availability depends on your country and VPN status, and a limited mode exists. And the CLI is interactive only: there's no prompt argument or non-interactive mode, so don't build CI pipelines around it.

Frequently Asked Questions

Is Freebuff actually free, or free like OpenCode?

Actually free. OpenCode is free software that still bills tokens to your API key. Freebuff covers the model and token costs with ads, so you never hand over a key or a card.

Do the models run on my machine?

No. The agent runs locally; the models run in the cloud over the internet, just as OpenCode, Claude Code, and Cursor reach theirs. There's no local model setup to maintain.

What's the catch with the ads?

You'll see text ads inline in the terminal or Desktop app while the agent works, and prompts may be analyzed to personalize them. The /model picker flags models that train on data or retain prompts, which matters most when the code is private.

Is there a usage limit?

Yes. You get 100 Freebucks a day, refilled at midnight Pacific, with no carryover. Each model has its own hourly rate in the /model picker, access varies by country and VPN status, and a limited mode can apply.

Conclusion

The bill you're looking at isn't bad luck. It's the OpenCode funding model doing what it says: free agent, paid tokens. Freebuff is the same category of tool with the meter removed, and switching costs one command:

npm install -g freebuff

npm install -g freebuff

Run it on the work that's driving your token spend this week. If the free tier covers it, cancel the API spend and keep the difference. Install the CLI or grab Desktop, and see what a coding agent costs when advertisers pick up the bill.