Ptero

Ptero is a free, non-profit AI chat platform that provides access to multiple powerful language models without requiring any signup or account creation. The platform prioritizes user privacy with a local-first approach where conversations are stored directly in your browser and never sent to servers. Users can pick a name for each session, which is saved locally so conversations persist across visits.

Key features include support for multiple AI models, complete privacy with local storage of chat history, optional cloud storage only for projects and custom files, and availability in 20+ languages. The platform is fully open-source and commits to remaining completely free forever with no paid plans, subscriptions, or paywalls. Ptero is ideal for developers, researchers, and anyone seeking a private, accessible AI chat experience without barriers to entry.