# FAQ

> Stub — frequently asked questions.

## Does ETM PowerSync send my data to the cloud?

No. The optimisation logic runs locally, on your hardware. That is an architectural
decision, not an option.

## Is the project open source?

The foundation (`powersync-core`) and the plugins are under GPL-3.0. So is the connector
to the optimiser (`optimizer-plugin`) — everything linked against nymea is. The
optimisation **business logic**, however (`powersync-optimizer`: tariff arbitration,
Predict AI), is proprietary: it runs in a separate process, reached over a Unix socket.
That IPC boundary is the heart of the Open Core model — the plugin stays free, the
business logic stays proprietary.