Schleuder Review, Pricing & Features

Learn how Schleuder provides GPG-encrypted mailing lists for privacy-focused groups, its features, self-hosting requirements, and open-source licensing.

Category
Email Marketing
Pricing
Free and open source, from Free
Verified
Not yet
Last updated
July 19, 2026
APIOpen SourceSelf-Hosted

Overview

Schleuder is a free, open-source encrypted mailing list manager written in Ruby and licensed under GPL 3.0. It allows subscribers to exchange OpenPGP-encrypted email among themselves while also safely sending and receiving messages from non-subscribers through automatic decryption and re-encryption.

The project is developed on the 0xacab.org GitLab instance, with a mirror on GitHub, and is commonly used by activist groups, privacy-focused organizations, and technical teams that need a self-hosted, encrypted group email solution.

Key Features

Schleuder automatically handles GPG encryption and decryption, header stripping, and format conversions for list traffic, removing the need for every subscriber to manage encryption manually for each message.

Version 3 introduced an internationalized, more robust rewrite along with an API that powers an optional web interface for managing list configuration and subscriptions.

Pricing

Schleuder is entirely free and open source, distributed under the GNU GPL 3.0 license with no commercial pricing tiers, subscriptions, or paid hosting offered by the project itself.

Because it is self-hosted software rather than a SaaS product, users are responsible for their own server, mail transfer agent, and ongoing maintenance costs, but there is no license fee to use Schleuder.

Key Features

Pros & Cons

Pros

  • Completely free and open source with no licensing cost
  • Strong end-to-end encryption model for sensitive group communication
  • Can safely bridge encrypted communication with non-subscribers
  • Available as prebuilt packages for major Linux distributions
  • Backed by an established privacy-tooling community (0xacab.org / Riseup infrastructure)

Cons

  • Requires self-hosting and server administration skills to deploy
  • No commercial support, SLA, or vendor to contact for help
  • No official cloud-hosted version offered by the project
  • Smaller user base and documentation compared to mainstream mailing list tools
  • Ongoing GPG key management still required at the list-admin level

Pricing

Frequently Asked Questions

Is Schleuder free to use

Yes, Schleuder is free, open-source software released under the GNU GPL 3.0 license with no licensing cost.

What does Schleuder do

Schleuder is a GPG-enabled mailing list manager that automatically encrypts and decrypts messages so subscribers can exchange OpenPGP-encrypted email securely.

Do I need to self-host Schleuder

Yes, Schleuder is self-hosted software; there is no official managed cloud version offered by the project.

What programming language is Schleuder written in

Schleuder is written in Ruby.

Can Schleuder communicate with people who are not on the list

Yes, Schleuder can receive and send messages to non-subscribers, re-encrypting traffic as needed to keep subscriber communication secure.

Where is Schleuder developed

Schleuder is developed primarily on the 0xacab.org GitLab instance, with a mirror available on GitHub.

Does Schleuder have a web interface

An optional web interface called schleuder-web can be used alongside Schleuder's API, introduced with the version 3 rewrite.

Related Tools