Press kit
By Lucas Flores, IT Systeme Flores UG. Last updated
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 reads a sample back from every backup each week to check that it can be restored.
In two sentences
Restow backs up Exchange Online mail, calendars, contacts, OneDrive, SharePoint Online sites and IMAP mailboxes to storage the customer controls. Every week it reads a sample back from each backup and checks it against the recorded hashes, so a backup only counts as proven 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 or NFS. Every week it reads a sample back from each backup, checks it against the recorded hashes and shows the result per mailbox. The core is open source under the Apache License 2.0 and free; Business and Service Provider are one-time licenses (€595 and €1,950 net from release), with no per-mailbox fee and an optional update year after the first 12 months of updates.
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 |
| Status | Beta, public on GitHub since 2 October 2026; the latest release is listed on GitHub; what is planned next is on the roadmap, without version numbers |
| License | Core: Apache License 2.0; Business and Service Provider modules: Restow license terms, in the same repository (open core) |
| Runs on | Linux with Docker Compose, self-hosted. Recommended: a dedicated Linux VM (Debian 12 or 13, Ubuntu 22.04, 24.04 or 26.04, amd64 or arm64) on other hardware than the systems it backs up, set up with the install script of the release |
| Container images | Two builds per release, each for amd64 and arm64, signed with cosign, with SBOM: full (ghcr.io/restow-backup/restow and restow-web, Business and Service Provider modules locked until a license key is installed) and Community (restow-community and restow-web-community, Apache 2.0 core only) |
| Protects | Exchange Online mail, calendar, contacts; OneDrive; SharePoint Online sites (since 0.4.0); IMAP mailboxes; SMB and NFS file shares without an agent; Linux and macOS servers and clients (file-level agent); Proxmox VE VMs and containers (preview); 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) |
| Updates | Pre-sale licenses include every 1.x update; from version 1.0, a license includes 12 months of updates, then an optional update year (Business €295, Service Provider €595 net per year). |
| Not included | Teams chats; 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.
Screenshots
Unretouched, from the public demo with synthetic data.
Recovery readiness (PNG)
Overview (PNG)
Restore explorer (PNG)
Audit log (PNG)
Machine (PNG)
Mail archive (PNG)
Alert and report rules (PNG)
Members (PNG)
Contact
Lucas Flores, info@it-flores.de, +49 2204 7675640 · About Lucas
More: pricing · Roadmap · comparisons · Changelog