OÜ Catyonic is an Estonian software company building privacy-first tools for communication, language learning, and secure internet access.
Free VPN client. Bring your own server key — no accounts, no logs, no tracking. Supports VLESS, VMess, Trojan, Hysteria, and other XRAY-based protocols.
AI-powered language learning platform built on the Language Skeleton method — a complete minimal core of any language on a few pages, designed to get you speaking from day one.
Coming soonCatyonic was founded in 2026 in Tallinn, Estonia. We build software tools that put users in control of their own data. Our products are designed to be lightweight, transparent, and free of unnecessary data collection.