Your workplace. Your data. One platform.
Stacular brings mail, calendar, messaging, room booking, and visitor management into one privacy-first workspace — EU-hosted, per-tenant encrypted, self-hostable.
Enterprise security with the simplicity of a consumer app.
Early access — Stacular is in active development with pilot organizations.
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Everything your team needs. Nothing you don't control.
Stacular is a privacy-first European workplace platform: the collaboration basics your team lives in — mail, calendar, contacts, messaging — combined with the workplace tools other suites treat as afterthoughts: room booking, visitor management, and digital signage.
Built in Europe, hosted in Europe, and designed so your organization's data stays yours — encrypted per tenant, isolated at the database level, with self-hosting on the roadmap for teams that want full control.
We're in early access and onboarding pilot organizations now.
Why Stacular
Private by design
EU data sovereignty isn't a compliance checkbox — it's the architecture. Per-tenant encryption, database-level isolation, audit logs, and no ads, no tracking, no data resale. Ever.
Instant workspace
Sign up and get a working workspace immediately — no weeks of IT setup, no consultants. Start personal, create an organization when your team is ready, and everything works the same in both.
One platform, not twenty tabs
Book a room, message a colleague, check your inbox, and register a visitor — in one coherent app on web and mobile, instead of a patchwork of single-purpose tools.
Yours to host
SaaS by default, self-hosted when you need it. Stacular builds on open standards like JMAP and Matrix — your mail and messages aren't locked into a proprietary silo.
What's inside
Mail & Calendar
A real mail server under the hood — not a wrapper around someone else's. Mail, calendar, and contacts share one account on an open-source backbone speaking JMAP, an open standard, so standard mail clients keep working too.
Messaging
Team chat built on the Matrix protocol — encrypted, federated, and standards-based. Your conversations belong to your organization, not to us.
Workplace management
Room and desk booking, visitor management, and digital signage as first-class features — the things big office suites do poorly, done properly.
Enterprise foundations
Organizations, roles, and multi-workspace membership are built in. Audit logs, SSO, and self-hosting are on the path to general availability — with a free tier for small teams as we move out of early access.