About Souvera
Not just hosting. Built, not assembled.
Souvera Workspace is built on Nextcloud – but that's just the foundation. Underneath lies extensive proprietary development: a dedicated mail server per instance, a compliant mail archive, spam and virus protection, and a modern JMAP mail client. All seamlessly integrated – greater than the sum of its parts.
- Dedicated mail server per workspace
- Souvera Shield – spam & virus protection
- Compliant mail archive (GoBD)
- Souvera Mail powered by JMAP
Not your average hosting
What sets Souvera apart from Nextcloud hosting
Standard hosting gives you file storage and a calendar. Souvera delivers a complete, deeply integrated system with its own infrastructure – developed and fine-tuned from a single source.
Dedicated mail server
Every workspace gets its own dedicated Stalwart mail server – no shared mailbox systems, no spillover effects from other customers.
Souvera Mail with JMAP
A modern mail client based on JMAP (RFC 8620): faster, more secure and more efficient than IMAP/SMTP. Includes import wizard, team mailboxes and help.
Souvera Shield
Upstream spam and virus filter, per-user quarantine, reputation management and suspicious login detection – all inside your workspace.
Compliant mail archive
GoBD-compliant, tamper-proof archiving with WORM storage and statutory retention periods – fully integrated on request.
Built to work together
Modules that interlock
Every Souvera module was built specifically for this workspace – not a patchwork of third-party plugins. All components share login, search and contacts.
Dedicated mail infrastructure
Private Stalwart mail server per instance, OIDC single sign-on without a second password, combined app passwords for IMAP, SMTP, Sieve, CalDAV and CardDAV.
Souvera Mail – the client
Modern JMAP protocol (RFC 8620), import wizard for migration, shared team mailboxes with automatic send-as, live quota and integrated help.
Souvera Shield – the protection
Per-user spam quarantine, virus scanning, personal whitelists and blacklists, reputation management for admins, suspicious login detection.
Souvera Central & beyond
Central admin panel, compliant mail archive, Android app with JMAP and its own push pipeline – Souvera AI is in development.
Seamlessly connected
One login, one search, one place
Email, files, calendar, contacts, office, chat and video – perfectly aligned. No isolated silos, no second logins.
Attachments directly to files
Save email attachments to your file storage in one click, or attach cloud documents directly to outgoing emails.
Calendar invites in one click
Meeting invitations received by email are recognized automatically and can be added to your calendar with a single click.
One central search for everything
Stop searching through separate apps. The smart, unified search finds emails, files, contacts and calendar events simultaneously.
Central address book
All recipients and contacts are available across the platform – whether composing emails or sharing documents.
Easy import wizard
Switching is simple. Our built-in migration tool transfers your existing emails and folder structure from your old provider.
Dashboard inbox widget
Stay on top of things from the moment you start. The dashboard widget shows your unread emails and upcoming tasks at a glance.
Your advantage
Sovereignty and convenience combined
Souvera Workspace delivers a turnkey solution that protects your data and is ready to use immediately – without tedious DIY setup.
No DIY – fully integrated
Skip the complex configuration of Nextcloud, mail and security. We deliver a perfectly tuned system from a single source.
GDPR-compliant German hosting
Operated in German data centers by Host-On Service Provider GmbH in Frankfurt. Fully GDPR-compliant and free from the US CLOUD Act.
Maintenance & support included
We handle ongoing maintenance, security updates and optimization – you focus entirely on your business.
Future-proof with apps & AI
Android app with JMAP and push pipeline already in the Play Store, iOS in development, local Souvera AI language models underway.
Ready for your sovereign workspace?
Let us discuss how Souvera Workspace can make your team's collaboration more productive, secure and independent.