Pro
Community runs the server. Pro adds the clients, the scale and the modules.
Pro is not a different product, and it is not a cloud. It is the same AGPL engine you can run yourself — plus the proprietary client apps your users open every day, the storage layer that takes you past a few thousand accounts, and optional modules you switch on as you need them. You still own it, on your infrastructure, in your jurisdiction.
Side by side
What each edition includes.
| What you get | Community | Pro |
|---|---|---|
| Licence | AGPL-3.0-or-later | Commercial licence (+ AGPL exemption for operators who resell) |
| Price | Free — you self-host | From CHF 0.50 / box (N1). Four tiers. |
| Mail, calendar, contacts, tasks | Complete | The same engine |
| Anti-spam | Three-stage scored pipeline (network → content → per-tenant Bayesian model), built in | A neural model (DistilBERT / ONNX) swaps into the model stage · Shield add-on (roadmap): attachment scanning, link protection, BEC |
| Client apps | Bring your own — any JMAP / IMAP / CalDAV client | Workspace (web) + Sync (desktop), built and supported by us |
| Storage & scale | SQLite — validated to ~2000 accounts / instance | PostgreSQL, object storage, clustering |
| Directory | — | LDAP / directory integration |
| Modules | — | AI (available) · Booking, Notify (Q2 2026) · Comms, Meet (Q4 2026) · Drive (pilot Q3 2026) — each labelled |
| Support | Community — GitHub issues & discussions | Commercial support bundles |
| Who operates it | You | You — Pro is still sovereign and self-hosted |
Nothing in Pro is taken away from Community. Community is, and stays, a complete sovereign mail-and-groupware server. Pro adds faces and scale on top — proprietary client apps and the layer that carries a large organisation.
Go deeper
Two ways to read the rest.
Or start with Community — the free, self-hosted server →Not sure which edition fits?
Tell us your shape — account count, who operates it, your jurisdiction — and we point you at the right edition and a firm figure.
Talk to us