TL;DR: WebBrain runs entirely in your browser. We don't collect, store, or transmit any of your data. Your API keys stay on your device. We have no servers, no analytics, no tracking.

What WebBrain Is
WebBrain is an open-source browser extension for Chrome and Firefox that connects to AI language model providers (such as OpenAI, Google Gemini, Anthropic, or OpenRouter) to help you read, analyze, and interact with web pages. It operates entirely within your browser.

Data We Collect
None. WebBrain does not collect, store, or transmit any personal data, browsing history, page content, or usage statistics to us or any third party. We operate no servers and have no backend infrastructure that receives your data.

How Your Data Flows
When you use WebBrain, data flows directly between your browser and the AI provider you have configured:

Page content — When you ask a question about a page, the relevant page content is sent directly from your browser to your chosen AI provider's API. WebBrain does not relay, intercept, or store this data.
API keys — Your API keys are stored locally in your browser's extension storage (chrome.storage.local or browser.storage.local). They are never transmitted to us or any third party. They are only sent directly to the AI provider you have selected.
Conversations — Your chat history exists only in your browser's memory during the session. It is not persisted to disk or sent anywhere other than to your configured AI provider for generating responses.
Third-Party AI Providers
WebBrain connects to the AI provider of your choice. Each provider has its own privacy policy and data handling practices:

OpenAI — openai.com/privacy
Google (Gemini) — ai.google.dev/terms
Anthropic (Claude) — anthropic.com/privacy
OpenRouter — openrouter.ai/privacy
We encourage you to review the privacy policy of whichever provider you use. When using API keys (as opposed to consumer products), most providers do not use your data for training by default, but please verify with your chosen provider.

Browser Permissions
WebBrain requires certain browser permissions to function. Here is what each permission is used for and why:

activeTab / tabs — To read the content of the current page when you ask a question, and to manage per-tab conversations.
scripting — To inject content scripts that can read page content and perform actions in Act mode.
sidePanel (Chrome) / sidebar_action (Firefox) — To display the WebBrain chat interface as a side panel.
storage — To save your settings (selected provider, API key, preferences) locally on your device.
No permission is used to monitor, track, or collect your browsing activity.

Act Mode
When you enable Act mode, WebBrain can interact with web pages on your behalf (clicking, typing, scrolling, navigating). This is done via content scripts running in your browser — no data about these actions is sent to us. All actions are performed locally and are visible to you in real time. Act mode requires explicit activation and displays a visible warning banner.

Cookies & Analytics
WebBrain does not use cookies. The webbrain.one website does not use analytics, tracking pixels, or any third-party scripts. There are no ads.

Children's Privacy
WebBrain is not directed at children under 13. We do not knowingly collect any information from children.

Open Source
WebBrain is fully open source under the MIT License. You can audit the complete source code to verify all claims in this privacy policy:

github.com/esokullu/webbrain

Changes to This Policy
If we make changes to this privacy policy, we will update the "Last updated" date at the top. Since WebBrain is open source with no data collection, significant privacy-relevant changes are unlikely.

Contact
If you have questions about this privacy policy, you can reach us at:

GitHub: github.com/esokullu/webbrain/issues
Website: emresokullu.com