Mellium Co-op


Mellium is a collection of Go libraries, tools, and modules related to XMPP.

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Financial Contributions

Recurring contribution


By supporting Mellium with a recurring donation you're helping ensure continued development.

Starts at$1 USD / month

Custom contribution


Make a custom one-time or recurring contribution.


Support the following initiatives from Mellium Co-op.


Sponsor an Outreachy intern

Provide a paid internship to someone subject to systemic bias and impacted by underrepresentation...

Security Audit

Fundraising to contract an independent third party to perform a security audit

OMEMO Encryption

Support end-to-end encryption with OMEMO

Mediated Information Exchange

Implement a modern groupchat protocol and help maintain the specifications.

Jingle Voice and Video

Implement a Jingle peer-to-peer voice and video stack to combate proprietary VOIP stacks.


Mellium Co-op is hosting the following events.

Past event

XMPP Office Hours: Virtual Co-working Hour

12:00 PM UTC
Join us for some virtual co-working with other folks from Mellium and the XSF!
Past event

XMPP Office Hours: Overview of Open Collective and Fiscal Hosting

04:00 PM UTC
We will discuss the XSF's new role as a fiscal host for the XMPP community and show off Open Coll...Read more
Past event

XMPP Office Hours: Preview of Communiqué

04:00 PM UTC
Mellium member Sam Whited will present a preview of our new TUI client, Communiqué for the XMPP O...Read more

Mellium Co-op is all of us

Our contributors 1

Thank you for supporting Mellium Co-op.

Sam Whited

Cooperator at Willow Bark, Corner Garage, and M...


Transparent and open finances.

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Let’s get the ball rolling!

News from Mellium Co-op

Updates on our activities and progress.

Dev Communiqué for October 2021

Work this month was slow and primarily focused around PubSub and Bookmarks which now have basic implementations! Recap · This month in...
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Published on October 31, 2021 by Sam Whited

Dev Communiqué for September 2021

The big news this month is the release of[email protected]! Most of the major improvements were covered in the release announcement and...
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Published on September 29, 2021 by Sam Whited

New release: v0.20.0!

After five months of work and 121 commits by three contributors, today we're releasing [email protected]! The following new contribut...
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Published on September 26, 2021 by Sam Whited


Mellium is a collection of libraries and tools relating to XMPP and written in Go. Our goal is to develop cooperative software that extends and contributes back to the XMPP ecosystem.

Our team

Sam Whited

Cooperator at Willow Bark, Corner Garage, and M...