restowbackup
Included Community Free Business €476 once, net List price from release: €595 Service Provider €1,560 once, net List price from release: €1,950
Available now
Microsoft 365 backup and restore (mail, calendar, contacts, OneDrive) Yes Yes Yes
IMAP backup and restore Yes Yes Yes
Non-destructive restore (never overwrites the original) Yes Yes Yes
Weekly recovery readiness checks (sampled restore verification) Yes Yes Yes
Basic operations log (job history, error messages) Yes Yes Yes
REST API Yes Yes Yes
Alerts by e-mail, in-app and webhook (failed backups, failed restore checks, storage damage) Yes Yes Yes
Mailbox limit None None None
Scheduled reports (daily, weekly or monthly summary by e-mail) No Yes Yes
Several administrators with roles (owner, administrator, technician, read only) One administrator Yes Yes
Archive with Microsoft 365 and IMAP sync, SHA-256 hash chain and full-text search Yes Yes Yes
GoBD layer for the archive (Exchange Online journaling, enforced retention, legal hold) No Yes Yes
Multiple tenants and the cross-tenant REST API One tenant One tenant Yes
Server and client backup with an agent (Linux and macOS, file-level, append-only) Yes Yes Yes
Mail file import (EML, MSG, MBOX, MailStore export) and export (EML ZIP, MBOX) Yes Yes Yes
Failure explanations: what happened, why, and what to do Yes Yes Yes
Update check (off until you turn it on) and an optional updater with automatic rollback Yes Yes Yes
Signed release images for amd64 and arm64, with SBOM Yes Yes Yes
In development
Audit log viewer (search, details, hash-chain verification, export as CSV and PDF) Recorded, no viewer In development In development
Single sign-on (Entra ID, OIDC, LDAP) No In development In development
Four-eyes approval for restores and deletions No In development In development
Signed, independently verifiable restore report (with checksum) No In development In development
Planned, not started
Delegated tenant administrators and tenant reporting No No Planned
White label No No Planned
Windows agent (with VSS snapshots) Planned Planned Planned
Agent mTLS and LVM, ZFS and btrfs snapshots Planned Planned Planned
PST and OST import, PST and MSG export Planned Planned Planned
Proxmox VE support (via PBS) Planned Planned Planned
SFTP storage target Planned Planned Planned

Mailbox and tenant counts are an honour rule, not a technically enforced limit: we trust you to buy the edition that matches how you use Restow. Business and Service Provider are for business customers only (§ 14 BGB), sold in the EU/EEA, Switzerland and the UK at launch.

Prefer to pay by invoice? Write to us.

License terms: German (authoritative) · English

Business customers only (§ 14 BGB).

Find your installation ID under Settings → License in Restow.

What "one-time purchase" means

  • A license is verified offline by a signed key: no phone-home check, nothing that can remotely disable the software, and no subscription that lapses.
  • All updates are included for as long as we actively develop Restow. If we ever stop, we will announce it at least twelve months in advance and publish the Business and Service Provider modules under the AGPL. Your installation then keeps running without a license key.
  • Licenses include the software and all updates. No support is included.

Backup and restore are complete in every edition and never limited by price or a mailbox count: the editions differ by what's added on top, not by what's held back.