Schleuder

A GPG-enabled mailing list manager for encrypted group communication

About Schleuder

Schleuder is a free, open-source mailing list manager with GPG encryption and resending capabilities. Subscribers communicate with a list address, and Schleuder decrypts, verifies, encrypts and forwards messages so groups can discuss pseudonymously and confidentially without trusting a central platform with plaintext. It integrates with standard mail servers and includes a web interface for administration. Schleuder is designed for activist groups, journalists, NGOs and other teams whose mailing lists genuinely need end-to-end encrypted communication.

Schleuder website preview

Live preview of schleuder.nadir.org via the WordPress mShots service — it can take a few seconds to generate on a first visit.

Schleuder: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers mailing list, gpg, encryption, privacy — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 619 tools in the Communication & Collaboration category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

Schleuder pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	schleuder.nadir.org

Schleuder key facts

Category: Communication & Collaboration
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: mailing list, gpg, encryption, privacy
Official site: schleuder.nadir.org

Schleuder FAQ

How much does Schleuder cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (schleuder.nadir.org).

What is Schleuder used for?

A GPG-enabled mailing list manager for encrypted group communication Its focus areas in the Communication & Collaboration category: mailing list, gpg, encryption, privacy.

Where can I try Schleuder?

On its official site, schleuder.nadir.org — the Visit Official Site button above goes straight there.

Schleuder vs alternatives

	Schleuder	Mailfence	Signal	Tox
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Freemium — a free tier lets you start, and paid plans are available if you need more.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas	mailing list, gpg, encryption, privacy	secure email, encryption, privacy, openpgp	messaging, encryption, privacy	messaging, peer to peer, encryption, privacy
Official site	schleuder.nadir.org	mailfence.com	signal.org	tox.chat
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Communication & Collaboration category

Chat, video meetings, and messaging apps that keep teams connected. The Communication & Collaboration category on Tools Hub currently lists 619 tools. Alongside Schleuder, it includes Roundcube, InspIRCd, RobustIRC, ZNC.

FreeCommunication & Collaborationmailing-listgpgencryptionprivacy

Alternatives to Schleuder

Tools in the same Communication & Collaboration category that share focus areas with Schleuder — worth comparing before you commit:

Communication & Collaboration

Mailfence

Belgian secure email suite with OpenPGP encryption

Freemiumsecure-emailencryptionprivacyopenpgp

Communication & Collaboration

Signal

Private messaging with gold-standard encryption

Freemessagingencryptionprivacy

Communication & Collaboration

Tox

Peer-to-peer encrypted messaging with audio and video chat, no central servers

Freemessagingpeer-to-peerencryptionprivacy

Communication & Collaboration

Addy.io

Anonymous email forwarding to protect your inbox

Freemiumemailaliasesforwardingprivacy

Communication & Collaboration

Burner

Disposable and second phone numbers for privacy

Freemiumtemporary-numbersprivacysecond-line

Communication & Collaboration

Canary Mail

Secure email with PGP and AI assistance

Freemiumemailencryptionapple

More in Communication & Collaboration

Comparing tools in the Communication & Collaboration category? These related listings are worth a look: Roundcube — Free and open-source webmail software with an application-like interface; InspIRCd — Modular Internet Relay Chat server written in C++; RobustIRC — IRC without netsplits, a distributed IRC server.