Calimero is a confidential cloud for collaborative apps. You write an app’s state and methods in Rust, and it runs as a WebAssembly component inside attested Intel TDX nodes. Each instance of the app has its own replicated log, so every write is applied in one order and the app keeps serving while most of its replicas run.

Clients check what a node runs before they send it anything, then talk to it over a sealed channel. People sign in with passkeys. Nobody operating the nodes, Calimero included, can read the app’s data.

You write no database, sync, encryption or server code. With Docker running, two lines install the command line and start a three-node cluster on your machine:

curl -fsSL https://raw.githubusercontent.com/calimero-network/core/master/scripts/install.sh | sh
meroctl local up

Quickstart →From those two lines to a running app you call from the terminal, in five steps.

The guide, in order

QuickstartRun a node, clone the example app, build it, deploy it and call it.

1. The example, line by lineThe KV Store's crate, state, methods, events, errors, ABI and tests, and the edit-rebuild loop.

2. Call it from codemero-js in the example's frontend: passkeys, the generated typed client, live events. Then Python, Rust and meroctl.

3. Package & publishSign a release into an .mpk and publish it to the app registry.

4. Deploy & installRun a published package on Calimero Cloud, or install it on a node from the registry.

Then the background: how Calimero works, what an app sees, organizations, the security model and the reference.