Freebuff

What it does

Freebuff is a coding agent that takes a natural-language task about your project and works on it, producing code edits, test runs and pull requests. The page's examples show it fixing a flaky auth test, rate-limiting a Stripe webhook with a 429 response and a Retry-After header, and adding a dark mode toggle that it then opens as a PR for review. Threads live in the cloud, so you can start a task on desktop, check it from a phone, and finish it in the browser.

People use it to hand off bounded engineering work and review the result, with the agent able to call connected tools such as GitHub, Linear, Stripe, Vercel and Sentry as it works. What distinguishes it on the page is the business model: the company says the models are funded by ads instead of a subscription, with no card or credits required.

It suits developers who want an agent for everyday coding tasks at no cost. Access is through desktop downloads for macOS, Windows and Linux, the terminal via npm, a web app, and Android today with iOS listed as coming soon. Limits to weigh are that the page names no paid tiers or quotas, does not list every model or integration, and presents the ad-funded model as the core trade-off.

What it can do

• Works on a coding task you describe in plain language, editing files and running tests.
• Runs tests and iterates, such as repeating a test run to confirm a fix is deterministic.
• Adds features such as rate limiting and dark mode, including tests for new code paths.
• Opens pull requests and requests review when a change is ready.
• Keeps threads in the cloud so work can continue across desktop, mobile and browser.
• Connects to external tools so the agent can use them while working.

Works with

• GitHub
• Linear
• Notion
• Stripe
• Vercel
• Supabase
• Sentry
• PostHog
• Resend

Before you choose

• The page says the service is funded by ads instead of a subscription; plan for ad-supported use rather than a paid tier.
• Mobile access is Android today with iOS listed as coming soon, so check current platform support before relying on it.
• Connected integrations are shown as one-click options, but the page does not state permissions or data handling for them.

Listed under

• Coding
• Coding agents
• Ad-supported
• AI coding
• CLI
• Coding agent
• Desktop
• Developer tools

Get started

Download the desktop app or run npm install -g freebuff in a shell, then run freebuff in your project.

1. Download the desktop app for your operating system from the downloads section, or run npm install -g freebuff in your terminal.
2. Sign in at freebuff.com using the sign-in link on the page.
3. Run freebuff inside your project folder, or open the web version in your browser to start a thread.

The page says the agent is free with no subscription, card or credits, funded by ads. No paid plans, quotas or rate limits are stated.

Freebuff is free to use. See their pricing page ↗

Sources for this overview

Product pages, documentation, and pricing checked 30 Oct 2026. Each source supports part of the overview; availability and prices can change.

• Freebuff: The free coding agent ↗freebuff.com

Company website

freebuff.com: product, pricing and policy pages

GitHub

Public code and releases

YC directory mirror

Batch and company name

Social accounts

Accounts the company links, and its posts on X

Human review

Checked by a person

manual_review

Last checked 30 Oct 2026. Every field keeps its source and date; unknown means we couldn’t confirm it.