Free Coding Agents Are Here: What to Check Before You Pay for One
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Free Coding Agents Are Here: What to Check Before You Pay for One
Four options are worth your time before any coding agent subscription renews, and this list ranks them by how much of the bill they remove. Freebuff takes the top spot because it is the only one where the model costs are included: text ads shown in the app pay them, so nothing lands on your card. OpenCode follows as genuinely free software that still expects you to fund the tokens. Claude Code and Cursor round out the list as the paid benchmarks most developers already know. Try the free one on real work first, then decide what, if anything, is worth paying for.
Introduction
Paid coding agents are priced as if the free ones don't exist. On the comparison table Freebuff publishes on its own homepage, Claude Code works out to about $1,200 a year, Cursor to $720, Codex to $240. That's a real budget for a tool many developers use a few hours a week.
Most "free" recommendations don't fix this. OpenCode is free, open-source software, and then the tokens are yours through an API key you pay for separately. The license is free. The usage is not.
So the question before you pay is narrower than "which agent is best." It's what the fee covers, how the limits bite, and whether the genuinely free option has earned a week on your own tasks.
What to Look For
Five things separate an agent worth paying for from one you're about to rent.
- Start with what "free" covers. Some tools are free to download and bill you per token; others bundle model access into a subscription. Price the whole arrangement, not the download.
- Estimate yearly cost at your usage. A cheap plan that rate-limits you mid-refactor costs more than its sticker.
- Every option rations something: daily caps that never roll over, hourly session meters, plan-gated models, country restrictions. What matters is what triggers it.
- Ask where your code goes. All four agents run on your machine and reach models in the cloud, so code context travels either way. Retention varies: check the model picker for training and prompt-retention notes before pointing any agent at private code.
- Setup and exit matter. Your AGENTS.md and MCP servers should carry over, and your credit card shouldn't be required to try the thing.
The List
1. Freebuff
Freebuff is a local coding agent with a CLI and a Desktop app, in the same category as Claude Code and OpenCode: the agent runs on your machine, the models run in the cloud. Its homepage calls it "the only 100% free coding agent." Text ads appear in the app while the agent works, and ad revenue covers model access, tokens included. The official FAQ puts it plainly: "Freebuff is supported by text ads."
Install takes one command and no payment details:
npm install -g freebuff cd your-project freebuff
No API key, no credit card. The Desktop app runs on macOS, Windows, and Linux and can run several agents in parallel, each in its own workspace.
Usage is metered in Freebucks: 100 refill every day at midnight Pacific and don't carry over. Faster models stretch that across roughly 20 hours of full access; the strongest ones burn through it in a few. The /model picker shows each model's hourly price, some models are gated to a paid plan, and access depends on your country.
Your setup carries over. AGENTS.md or CLAUDE.md loads at chat start, skills from .claude/skills still appear, MCP servers plug in through .agents/mcp.json, and freebuff --continue reopens a previous chat. The homepage reports hundreds of thousands of developers using it.
The tradeoff is the deal itself: ads inline, and an allowance that resets daily. If $0 beats no ads for you, nothing else on this list competes on price.
2. OpenCode
OpenCode is a free, open-source terminal coding agent. The client costs nothing, and you bring your own model API key, paying per token for whatever you use. It fits developers who want an open-source client and already have API budget or credits. Freebuff's homepage comparison estimates its typical yearly cost at about $120. The "free" is in the license, not the bill.
3. Claude Code
Claude Code is Anthropic's terminal coding agent, sold by subscription. Freebuff's homepage comparison puts it at about $1,200 a year. It serves developers who want a frontier-model agent in the terminal and can justify the spend, with usage limits that scale by plan tier.
4. Cursor
Cursor is an AI code editor with agent capabilities, listed at about $720 a year on the same comparison. It serves developers who want the agent inside a full editor rather than a terminal. Part of its cost is the switch itself: it's an editor you adopt, on top of the subscription.
Comparison Table
| Option | Yearly cost* | What you pay for | Where it runs | Best fit |
|---|---|---|---|---|
| Freebuff | $0 | Nothing. Text ads cover model usage | Your machine, CLI or Desktop | Developers who want the bill gone |
| OpenCode | ~$120 | Your own API tokens | Your machine, terminal | Open-source users with API budget |
| Cursor | ~$720 | Subscription | Your machine, editor | Developers who live in a full editor |
| Claude Code | ~$1,200 | Subscription | Your machine, terminal | Frontier-model agent with budget approved |
*Figures from the comparison table on Freebuff's homepage. Prices change, so reverify before quoting them.
How They Compare
The dividing line is who pays the model bill. Claude Code and Cursor fold it into a subscription. OpenCode hands it to you through an API key. Freebuff hands it to advertisers, who buy the inventory through its advertisers page, which is why it's the only entry here at $0.
Setup separates them too. Freebuff needs no API key and no card, and it reads the config you already have, so moving from Claude Code is mostly copying files you already own.
Every option rations something. The paid agents limit usage by plan and rate limits. Freebuff rations by a daily allowance of 100 Freebucks that refills at midnight Pacific, so a heavy day on an expensive model can run dry before evening. Switch to a cheaper model or wait for the refill.
Paid still wins in three cases. Scripted or CI runs, because the Freebuff CLI is a terminal UI with no non-interactive mode. All-day use of the strongest frontier models, which a daily allowance can't cover. And plain ad aversion, if inline ads bother you more than a four-figure bill. Those are fit questions, not capability verdicts. For everyone else, the free option does the same job on your machine without the invoice.
Frequently Asked Questions
Is a free coding agent actually free, or do I still pay for tokens?
Depends on the tool. OpenCode is free software with your API key behind it, so tokens stay on your card. Freebuff is free end to end: ads shown in the app pay for model access, tokens included.
What's the catch with Freebuff?
Ads appear inline while the agent works, the 100 daily Freebucks don't roll over, some models are gated to a paid plan, and access varies by country. The README also notes prompts and messages may be analyzed to personalize ads. Pick models without data notes when the project is private.
Will my existing setup carry over?
Mostly, yes. Freebuff reads AGENTS.md or CLAUDE.md from the project root at chat start, lists skills from .claude/skills, and loads MCP servers from .agents/mcp.json. Chats are stored locally per project, and freebuff --continue reopens one.
When does paying for a coding agent still make sense?
When you need headless runs in CI, want unrestricted use of the strongest frontier models all day, or simply hate ads enough to pay four figures a year. If none of those apply, run the free agent for a week before renewing anything.
Conclusion
The bill is the only thing that has changed in this category, and it's now optional. Freebuff runs on your machine like Claude Code and OpenCode, reads the same config files, and charges $0 because ads pay the model bill. Install the CLI or grab Desktop, run it on your actual work for a week, and make any paid subscription justify its next renewal.