Press kit
Free to quote and use. Please link to restowbackup.com.
In one sentence
Restow is self-hosted, open-source backup for Microsoft 365 and IMAP that proves every week that backups can actually be restored.
In two sentences
Restow backs up Exchange Online mail, calendars, contacts, OneDrive and IMAP mailboxes to storage the customer controls. Every week it restores a sample from each backup and compares it byte for byte, so a backup only counts as restorable once it has been read back.
In four sentences
Restow is self-hosted backup for Microsoft 365 and IMAP, made by IT Systeme Flores in Bergisch Gladbach, Germany. It runs as one Docker Compose stack on a Linux server, encrypts every backup with a key per organization and writes to local disk, S3-compatible storage, NFS or SMB. Every week it restores a sample from each backup and compares it byte for byte, and shows the result per mailbox. The core is AGPL-3.0 and free; Business and Service Provider are one-time licenses (€595 and €1,950 net from release), with no per-mailbox fee.
Fact sheet
| Product | Restow, backup for Microsoft 365 and IMAP |
|---|---|
| Tagline | Restow. Backup you can prove is restorable. |
| Name | To stow is to put something away so carefully that you can find it again when it matters. Restow does that with your data, and checks every week that it still can. |
| Pronunciation | ri-STOH, stress on the second syllable; written Restow in running text and restow backup in the logo |
| Maker | IT Systeme Flores UG (haftungsbeschränkt), Bergisch Gladbach, Deutschland |
| Founder | Lucas Flores |
| Version | 0.1.0 beta, public on GitHub from 6 October 2026 |
| License | Core AGPL-3.0; Business and Service Provider modules source-available under a separate license, in the same repository (open core) |
| Runs on | Linux server or VM, Docker Compose, self-hosted |
| Protects | Exchange Online mail, calendar, contacts; OneDrive; IMAP mailboxes; Linux and macOS servers and clients (file-level agent); imported mail files (EML, MSG, MBOX) |
| Editions | Community free; Business €595, Service Provider €1,950 one-time, net, from release (pre-sale €476 and €1,560) |
| Not included | SharePoint and Teams; a Windows agent, disk images and PST import (planned or not in scope); support (setup on quote) |
| Development | Built by one person with AI assistance; tests and storage format are open |
Logos
- Logo mark, for light backgrounds (SVG)
- Logo mark, for dark backgrounds (SVG)
- App tile (SVG)
- Wordmark, for light backgrounds (SVG)
- Wordmark, for dark backgrounds (SVG)
Keep a clear space of one stroke width around the mark and do not go below 16 px. Please do not recolor, distort or add effects.
Contact
Lucas Flores, info@it-flores.de, +49 2204 7675640 · About Lucas
More: pricing · Roadmap · comparisons · Changelog