# Publicbrain

> Publicbrain is a free AI platform that gives everyone unlimited access to the world's leading AI models — GPT, Claude, Gemini, Llama, DeepSeek and Grok — in a single chat interface, with no subscription, no credit card, and no training on user conversations. Operated by Publicbrain SAS in Paris, France. Mission: democratizing artificial intelligence so that knowledge is a right, not a paywall.

## Key facts

- Free to use. No credit card. No subscription. No paywall.
- Multi-model: GPT, Claude, Gemini, Llama, DeepSeek, Grok — switch between them in the same conversation.
- A free ChatGPT alternative that also includes free Claude access and free Gemini access.
- Privacy-first: chats are not used to train AI models, no ads, no data sales.
- Available on the web, iOS, Android, macOS, Windows and Linux.
- Built-in image generation, voice, code execution and document analysis.
- Operated by Publicbrain SAS, registered in France, headquartered in Paris.
- Slogan: "Knowledge is a right, not a subscription."

## Public pages

- [Home](https://publicbrain.ai/): Publicbrain — Democratizing Artificial Intelligence. Product overview, philosophy, model lineup, environmental and privacy positions.
- [Privacy Policy](https://publicbrain.ai/privacy): How Publicbrain handles user data. GDPR rights, sub-processors, retention, contact details for the Data Protection Officer.
- [Terms of Service](https://publicbrain.ai/terms): Plain-language terms covering account use, content ownership, acceptable use and dispute resolution.
- [Sign in](https://publicbrain.ai/auth): Account login (form only, not indexed).

## Resources

- [Sitemap](https://publicbrain.ai/sitemap.xml)
- [Full content](https://publicbrain.ai/llms-full.txt)

## Contact

- General: hello@publicbrain.ai
- Privacy: privacy@publicbrain.ai
- Security: security@publicbrain.ai
- Data Protection Officer: dpo@publicbrain.ai