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Open Archiver

A secure, sovereign, and open-source platform for email archiving and eDiscovery.

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A secure, sovereign, and open-source platform for email archiving and eDiscovery. Open Archiver provides a robust, self-hosted solution for archiving, storing, indexing, and searching emails from major platforms, including Google Workspace (Gmail), Microsoft 365, PST files, as well as generic IMAP-enabled email inboxes. Use Open Archiver to keep a permanent, tamper-proof record of your communication history, free from vendor lock-in.

Platform availability

Available on 3 of 9 platforms

  • Unraid
  • TrueNAS
  • Umbrel (not listed)
  • ZimaOS (not listed)
  • Proxmox
  • Helm (not listed)
  • Mac (not listed)
  • Windows (not listed)
  • Linux (not listed)

Health score?A 0-100 score computed nightly from four factors: maintained (40%: recent commits and steady activity), popular (25%: GitHub stars, log scale), easy to install (20%: platforms, install notes, setup guides, Docker image) and light to run (15%: minimum RAM, ARM support). When the source code has been checked, a fifth factor, security check (20%: automated scan for committed secrets, unsafe desktop-app settings, known-vulnerable dependencies and project hygiene; any serious finding caps it at 20), is added. Factors without data are left out and the rest are rescaled.

67/100 Good

Maintained
82last commit 26 days ago
Popular
682,402 GitHub stars
Easy to install
553 install platforms, install notes, Docker image
Light to run
404 GB minimum RAM, runs on ARM

Availability: platform listings confirmed today, links checked 10 days ago

GitHub stars
2,402
Open issues
225
Last commit
2026-09-17
Latest release
v0.6.0
License
AGPL-3.0
Activity
declining

Checked 7 days ago - source: GitHub (LogicLabs-OU/OpenArchiver)

Resources & Compatibility

Minimum requirements: 4 GB RAM. ARM (e.g. Raspberry Pi) is supported.

Checked 15 days ago - source: Docker Hub image tags and published docs

First-install notes

  • Add 32-bit support and libraries Run the apt commands from the docs to enable 32-bit architecture and install the needed libraries plus screen. Without them the program may not start or may crash because it expects 32-bit files. source
  • Dependencies Runs on Docker with PostgreSQL, Meilisearch, and Redis as backing services. source

Fetched 5 days ago - each note links to its source

Alternatives (2)

  • MailStore - MailStore Home - A 100% free single-private-user desktop solution MailStore Home enables you to backup all your email messages from multipl…
  • mail-archiver - Mail Archiver is a self-hosted web application for archiving, searching, and exporting email and its attachments, storing everything in a P…

Checked 12 days ago - source: AlternativeTo

Common questions

Does Open Archiver support role-based access?

Open Archiver v0.3 added role-based support.

What installation problem has been reported for Open Archiver on TrueNAS?

A TrueNAS forum thread reports that the Open Archiver app can fail to install and needs troubleshooting.

Can Open Archiver search text inside attachments?

Yes, Open Archiver indexes email and supports full-text search of attachments.

Where does Open Archiver keep archived mail on the server?

Open Archiver stores mailboxes as .eml files on your server.

Has Open Archiver had issues with losing archived messages?

Open Archiver had message-loss bugs, and four of them were fixed in one update.

Answers sourced from forum.cloudron.io, forums.truenas.com, korben.info, www.reddit.com

Community

Collected 14 days ago - public community threads