Vithos

A keyboard-first, local-first mail client for Gmail on macOS. Three keys to learn: up and down to move, A to archive, and the palette. Mail stays in Gmail; Vithos keeps a fast local SQLite index on the machine so search answers as you type and the inbox still works on a plane. Every interaction is held to a 60 FPS, sub-50ms bar. Agents are a first-class surface, not a bolted-on inbox AI: a public API and MCP server give your own assistant scoped, revocable access to search, draft, and file. Vithy, the in-app assistant, drafts and rewrites only when asked, and sending mail stays a human action.