Your browser, your models, your data. WebBrain is a free, open-source AI browser agent for Chromium browsers and Firefox. Run it locally with llama.cpp and most queries cost nothing — your data never leaves your device. It reads pages, extracts data, and automates tasks right from the sidebar. Prefer the cloud? Bring your own API key for OpenAI, Claude, OpenRouter, or 100+ OpenAI-compatible providers. Multilingual UI, token-conscious screenshots. MIT licensed.
Today I’m launching WebBrain, a free, open-source AI browser agent that lives directly inside your browser.
I built it because the most capable browser agents are generally closed source, tied to specific models, and locked behind subscriptions. WebBrain takes a different approach:
Works with Claude, OpenAI, OpenRouter, or local models through llama.cpp
Runs on Chrome, Firefox, and Edge
Uses screenshots and browser accessibility data to understand and operate websites
Keeps you in control of the model, provider, and data
Drafting this launch, I used WebBrain to write parts of it. 🙂
Ask. Act. Automate. Any LLM.
This isn’t my first attempt at making the web more programmable. In 2006, I launched Grou.ps, which grew to 350,000 communities and 12 million registered members before its assets were acquired by a publicly traded telecom company.
Later, I launched GraphJS here on Product Hunt—an open-source toolkit that let developers add social-network features to websites using a few HTML tags and JavaScript. About a year later, it was acquired by its first enterprise customer.
Now I’m bringing that same open-web philosophy to AI browser agents.
Try it on this page right now — have it draft or revise your comment and actually post it. Or just ask "who built this?"
About WebBrain on Product Hunt
“The sidebar agent for the rest of us”
WebBrain launched on Product Hunt on August 13th, 2026 and earned 120 upvotes and 9 comments, placing #12 on the daily leaderboard. Your browser, your models, your data. WebBrain is a free, open-source AI browser agent for Chromium browsers and Firefox. Run it locally with llama.cpp and most queries cost nothing — your data never leaves your device. It reads pages, extracts data, and automates tasks right from the sidebar. Prefer the cloud? Bring your own API key for OpenAI, Claude, OpenRouter, or 100+ OpenAI-compatible providers. Multilingual UI, token-conscious screenshots. MIT licensed.
On the analytics side, WebBrain competes within Browser Extensions, Chrome Extensions, Artificial Intelligence and GitHub — topics that collectively have 576.7k followers on Product Hunt. The dashboard above tracks how WebBrain performed against the three products that launched closest to it on the same day.
Who hunted WebBrain?
WebBrain was hunted by Chris Messina. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of WebBrain including community comment highlights and product details, visit the product overview.
Chris Messina
Hi Product Hunt! I’m Emre — and I’m back.
Today I’m launching WebBrain, a free, open-source AI browser agent that lives directly inside your browser.
I built it because the most capable browser agents are generally closed source, tied to specific models, and locked behind subscriptions. WebBrain takes a different approach:
Works with Claude, OpenAI, OpenRouter, or local models through llama.cpp
Runs on Chrome, Firefox, and Edge
Uses screenshots and browser accessibility data to understand and operate websites
Keeps you in control of the model, provider, and data
Drafting this launch, I used WebBrain to write parts of it. 🙂
Ask. Act. Automate. Any LLM.
This isn’t my first attempt at making the web more programmable. In 2006, I launched Grou.ps, which grew to 350,000 communities and 12 million registered members before its assets were acquired by a publicly traded telecom company.
Later, I launched GraphJS here on Product Hunt—an open-source toolkit that let developers add social-network features to websites using a few HTML tags and JavaScript. About a year later, it was acquired by its first enterprise customer.
Now I’m bringing that same open-web philosophy to AI browser agents.
Try it: 👉 webbrain.one
Star it: ⭐ github.com/webbrain-one/webbrain
MIT licensed and open source.
Try it on this page right now — have it draft or revise your comment and actually post it. Or just ask "who built this?"