About Lycana
Lycana is an AI diagramming tool for system design. Describe an architecture with voice or text, then refine the resulting diagram on the canvas.
Built for thinking through systems
Lycana helps software engineers practice system-design interviews and explain software architecture. Commands turn an idea into structured, editable nodes and links. You can move components, change names, add notes, and group related parts in boundaries. Voice, typed commands, and direct editing work on the same diagram.
Who operates Lycana
Lycana is operated by Justin Zhi Yong Seow and Jensen Huang Yan Kai, based in Singapore. For product questions, feedback, or help with an account, visit the Contact page.
Try a diagram
You can start drawing without an account. A guest draft stays in that browser on that device. Sign in to save your diagram to your account. AI commands and voice input have usage allowances. The Pricing page explains the Free and Lycana Pro plans.
Lycana is in beta. Keep a private copy of work that matters to you. Read the Privacy Policy for how diagrams, commands, voice input, and account information are handled.