Gajim vs Synapse
A side-by-side comparison of two self-hosted matrix & xmpp options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Gajim | Synapse |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Category | Matrix & XMPP | Matrix & XMPP |
| License | GPL-3.0 | AGPL-3.0 |
| Language | Python | Python |
| Setup difficulty | Easy | Hard |
| Min. RAM | 128 MB | 1,024 MB |
| Deployment | binary, source | docker, bare-metal |
| GitHub stars | ★ 600 | ★ 4,643 |
| First released | 2005 | 2014 |
| Replaces | Skype, Slack | Slack, Discord, WhatsApp |
What are Gajim and Synapse?
Gajim
Gajim is a cross-platform XMPP instant messaging client written in Python with a GTK interface. It supports OMEMO encryption, group chats, file transfer, and an extensive plugin system.
- OMEMO encryption
- Plugin system
- Group chat support
- Cross-platform
Synapse
Synapse is the reference homeserver implementation for Matrix, an open protocol for decentralized, federated, secure chat. It targets communities and organizations running their own messaging infrastructure. It is deployed via Docker or native packages.
- Federated Matrix homeserver
- End-to-end encrypted rooms
- Bridges to other networks
- Many compatible clients
Gajim vs Synapse: key differences
Both projects are written in Python. Licensing differs — GPL-3.0 for Gajim versus AGPL-3.0 for Synapse. Gajim is the lighter option, starting around 128 MB of RAM against 1,024 MB for Synapse. Gajim is the more established project (first released 2005), while Synapse arrived in 2014. Synapse has the considerably larger community, at 4,643 GitHub stars versus 600. Synapse lists first-class Docker deployment; Gajim does not.
Why pick each one
Choose Gajim if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Written in Python
- Tiny footprint — runs in 128 MB RAM
Choose Synapse if…
- Open federated protocol
- Strong encryption
- Bridges to other chats
Watch out for
- Resource and maintenance heavy
- Complex to operate well
Frequently asked questions
Is Gajim or Synapse better?
Neither is universally better. Synapse has the larger community, while Gajim is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Gajim and Synapse free and open-source?
Yes. Gajim is licensed under GPL-3.0 and Synapse under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Gajim and Synapse with Docker?
Gajim: check the project docs for container support. Synapse: yes.
Which is lighter on resources, Gajim or Synapse?
Gajim has the smaller minimum footprint at 128 MB of RAM, compared to about 1,024 MB for Synapse. Real-world usage depends on library size, user count, and enabled features.