A suite of AI development tools built on the promise of making coding 100% free. It runs on open models such as DeepSeek, MiMo, and MiniMax, and covers its operating costs through advertising, so there is no subscription, no credit purchase, and no API key registration. It launched on February 12, 2026, and is developed by James Grugett, co-founder of Codebuff (YC F24), and his team. The core product is a CLI agent that runs in the terminal, but there are five entry points in total: Web for turning a prompt into a deployed web app, Cloud for working on GitHub repositories in a cloud IDE, Chat for research questions, and Desktop for running multiple agents in parallel. The source code is published under Apache-2.0.
Key Features
- No subscription and no API key: Install with
npm install -g freebuff, then runfreebuffin your project directory to get started. No credit card registration and no OpenAI or Anthropic API key are required - Ads make the free tier work: Small text ads from sponsor companies appear between agent turns. They are text-only rather than images or video, so they interfere little with your work, but it is worth understanding that prompts may be used to personalize those ads
- Choose from open models: You can pick from leading open-weight models such as DeepSeek, MiMo, GLM, and MiniMax. The lineup rotates over time. Claude is available through BYOK (bring your own API key)
- Four entry points beyond the CLI: Alongside the terminal CLI, there is Web, which turns a prompt into a web app with its own live URL; Cloud, a cloud IDE with an editor and terminal; Chat, focused on research; and Desktop, which runs multiple agents in parallel on your own machine
- Multi-agent architecture: Rather than routing everything through a single model, it splits context gathering, planning, code editing, research, and review across dedicated agents. That foundation is the open “Codebuff” framework, which you can also use to build custom agents or embed into another application
- Does not store your codebase: According to the official description, the codebase itself is not stored, and only minimal logs are collected for debugging
Pricing
| Plan | Price | What you get |
|---|---|---|
| Freebuff (full mode) | $0 (with ads) | Available in supported countries. Multiple models to choose from |
| Freebuff (limited mode) | $0 (with ads) | Outside supported countries or over a VPN. Lightweight model only, up to 6 one-hour sessions per day |
| Codebuff Pro | See official site | Paid plan for teams that want no ads and priority models |
Full mode is offered in 25+ countries including the US, Canada, the UK, and the EU; other regions and VPN connections fall back to limited mode. Check the official site’s current country list to see which applies where you are.
Pricing is current as of August 2026. Please check the official site for the latest pricing.
Pros & Cons
✅ Pros
- Costs nothing at all, which makes the barrier to trying an AI coding agent extremely low
- No API key issuance, billing setup, or usage monitoring is required, so you can go from install to running in a few minutes
- Separate entry points for CLI, Web, Cloud, Chat, and Desktop make it easy to extend beyond terminal work
- Open source under Apache-2.0, so you can also build your own agents on the underlying Codebuff framework
- Not locked to a single vendor’s model — you choose among open models
⚠️ Cons
- Prompts and messages may be used to personalize ads, which calls for careful judgment when handling confidential code at work
- Functionality is restricted outside supported countries, with limits on model choice and daily usage time
- Because the models are funded by advertising revenue, the lineup and limits can change without notice
- As the flip side of being free, support and SLAs cannot be expected to match those of paid services
- Some features carry a “may use data for AI training” notice, which takes some effort to review before use
Comparison with Similar Services
| Criteria | Freebuff | Claude Code | Gemini CLI | Codex CLI |
|---|---|---|---|---|
| Provider | Freebuff, Inc. | Anthropic | OpenAI | |
| Cost | Free (ads) | Mostly paid plans | Free tier available | Mostly paid plans |
| Setup required | None | Account/plan | Google account | Account/plan |
| Models used | Open models (selectable) | Claude | Gemini | GPT family |
| Form factors | CLI/Web/Cloud/Chat/Desktop | CLI/desktop | CLI | CLI/Web |
| License | Apache-2.0 | Proprietary | Apache-2.0 | Open source |
Who Is It For
- People curious about AI coding agents who want to try one before committing to a monthly or usage-based plan
- Learners and students who want to just run something without managing API keys or watching usage meters
- Anyone who wants an agent for everyday use in low-confidentiality settings such as personal projects or OSS side work
- People who want to see what open models can actually do on their own repositories
- Developers who want to build their own multi-agent setup on top of the Codebuff framework
Summary
Freebuff takes the idea of covering operating costs with advertising and uses it to drive the price of an AI coding agent effectively to zero. Its ease of adoption stands out: install it, type a command, and you are working — something paid tools rarely match. On the other hand, prompts may be used for ad optimization, functionality is regionally restricted, and models and limits can shift; these constraints are the other side of being free. A practical approach is to judge by the confidentiality of the code you handle: Freebuff for personal projects and learning, paid tools for sensitive work.