Caspian - Your Local AI Workbench

Anything can become a workspace

Point Caspian at a diagram, a map, a live feed, or your own API. It builds the workspace around it and your notes pin to the parts that matter, same pattern for a floor plan or a running dashboard.

Connect your AI models

Bring your own key. Pick the provider a canvas is built with: Anthropic Claude, Google Gemini, OpenAI, or OpenRouter. Set it in Settings → AI, choose the exact model, and switch any time. Keys stay on your machine, never on our servers.

Private vault for your notes

Your notes are plain Markdown files in a vault on your own disk, pinned to the parts of a workspace that matter. Private by default: nothing synced, nothing uploaded, nothing shared unless you decide to.

Local by construction

The whole workspace is files on your disk: notes as plain Markdown, everything else as ordinary code and data you can open, edit, or move. No account, no hosted database, nothing that breaks when a server goes down.

But, publish to web instantly!

Right-click a workspace and hit Publish to put a read-only copy on the web at its own address. Before it goes live, tick exactly which of the workspace's controls visitors get to use and leave the rest out. Password-protect it or take it down anytime.

Built by describing them.

Each of these started as a sentence. Different projects, different workspaces. Same workbench!

Live

Shipping Watch: Tracking vessel traffic Live AIS off Dover. Notes stay pinned to each ship as it moves, so what you wrote last week is still on the right vessel today.

Live

Top 10 Stocks: Watching the market The day's biggest movers, refreshed on their own. A note stays with its row through every re-rank.

Notes pinned to a brain anatomy diagram in Caspian

Reference diagrams: Learning a system Any diagram becomes living documentation. Click a part, get your note.

Notes pinned to the Caspian Sea on an interactive map

Maps: Fieldwork and research Anchor what you know to the exact place it's about.

Notes pinned to rooms on a floor plan in Caspian

Floor plans: Planning a space Pin notes straight onto the room, the rack, or the build.

Self-serve

Free

Bring your own keys and run Caspian entirely on your machine.

Add your own API keys: Anthropic, OpenAI, Gemini, and OpenRouter all supported.

Get for Free

Managed

$20/ month

We manage the models and the infrastructure so you don't have to.

We manage the models for you, no API keys to set up.
Auto-selects the best model for the task at hand.
Daily backups of your whole Workbench, restorable to any point.
Publish Workspaces to the website, we host them!

A Managed Workbench for Scattered Vibe Coding Projects.