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Restow Backup icon

Restow Backup

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Self-hosted backup for Microsoft 365, IMAP, servers, file shares and Proxmox VE that regularly proves your backups can actually be restored.

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  • New

Updated

  • Updated Nov 2026

Platforms

  • Linux  Server runs with Docker Compose on Debian 12/13 or Ubuntu 22.04/24.04/26.04 (amd64, arm64). Backup agent for Linux and macOS servers and clients.
  • Docker  Official images on ghcr.io for amd64 and arm64, signed with cosign, with SBOM.
  • Proxmox Virtual Environment  Backs up VMs and containers of Proxmox VE 8.4 and newer (preview). A small helper is installed on each node.
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Restow Backup was added to AlternativeTo by lcsfls on and this page was last updated .

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What is Restow Backup?

Self-hosted backup and archive for Microsoft 365 (Exchange Online, OneDrive, SharePoint Online, groups), IMAP mailboxes, Linux and macOS servers and clients, SMB and NFS file shares, and Proxmox VE (preview).

Restow does not stop at “backup succeeded”: a restore check regularly reads a sample of each backup back through the real restore path, decrypts it and compares it with the fingerprints recorded at backup time. A backup only shows green after that check has passed.

Your data stays on storage you choose (local disk, S3-compatible, NFS), encrypted with your own key. Immutable backups with S3 Object Lock and ransomware detection are included in every edition. The archive is designed for GoBD-compliant email retention. The Service Provider edition adds multi-tenancy for MSPs.

Open core: the Community edition is free under the Apache License 2.0, with no mailbox limit. Business and Service Provider are one-time licenses with optional update years, no per-user pricing. Restow is currently in beta: run it alongside your existing backup until you have verified restores with your own data.