Your whole desktop,
right where you left it.
Terrarium is a desktop app, not a phone one. Browser tabs, notes, timers and mini-apps on a pinboard you never have to rebuild. Quit, come back, and it's all still there, down to the seconds on a running timer.
A pinboard you pan and zoom.
Drag any empty space to pan, from anywhere, at any zoom. ⌘-scroll zooms toward the cursor. Hit Fit and every window snaps into frame.
- Floating windows: drag, resize, raise, snap to an edge to tile
- Layers: send behind, keep normal, or pin always-on-top
- Workspaces: a row of pills, each with its own windows and theme
Everything, in one window manager.
A real browser, real notes, real files, plus the small stuff you keep reaching for.
- Browser with real Chromium tabs and logins that stick
- Rich-text Notes with a saved library · a File viewer for images and PDFs
- A live mirror of any Mac app · Reminders, Timer, Alarm, Stopwatch, Clock
One keystroke to anything.
A fuzzy command palette over every action: open a panel of any type, run layout and zoom commands, jump between workspaces, open settings. Rebind the shortcut if ⌘K isn't yours.
Themed down to the pixel.
Light and dark, glass chrome, styled scrollbars. Set the accent, text and background colour, or drop in a background image, for this workspace, or all of them at once.
The same desktop, wherever you open it.
Windows, positions, layers, note contents, workspaces and themes are kept as plain files, not locked inside one computer. They sync end-to-end encrypted, so the server only ever relays a blob. Open Terrarium on another machine and your setup is already there. macOS ships first; Windows is the next port.
Where it's going
- A third-party plugin runtime: web, worker and native tiers
- Connectors with an MCP layer, so an in-app Claude gets tools for free
- In-app Claude: an edge-bar chat, a full panel, and ⌘K
- Cross-device sync: end-to-end encrypted layouts, notes and themes
- A mobile companion shell
- The Windows port
Terrarium is coming to macOS.
It's in early development. Drop your email and we'll tell you the moment the beta opens.