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 service prioritizes user privacy with a local-first approach, keeping all conversations stored directly in the browser rather than on servers. Users can choose a name for each session, and their chat history remains on their device, giving them complete control over their data.

The platform offers both local storage for regular conversations and optional cloud storage for projects and custom files. Ptero is committed to remaining completely free forever with no premium tiers, paywalls, or paid plans. It's designed for anyone seeking private, accessible AI assistance without the barriers of registration or subscription costs.