Mastodon vs pump.io
A side-by-side comparison of two self-hosted social networks options — licensing, setup difficulty, resource needs, and what each one replaces.
Mastodon
Decentralized open-source microblogging server
VS
pump.io
Streams server for the social web
| Feature | Mastodon | pump.io |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 100 · Excellent | 48 · Fair |
| Category | Social Networks | Social Networks |
| License | AGPL-3.0 | Apache-2.0 |
| Language | Ruby | JavaScript |
| Setup difficulty | Hard | Medium |
| Min. RAM | 2,048 MB | 256 MB |
| Deployment | docker, bare-metal, source | bare-metal, source |
| GitHub stars | ★ 50,319 | ★ 2,237 |
| First released | 2016 | 2013 |
| Replaces | Twitter, X |
What are Mastodon and pump.io?
Mastodon
Mastodon is a free, open-source decentralized social network and microblogging server. It is part of the fediverse, federating with other ActivityPub servers so users can follow accounts across instances.
- ActivityPub federation
- Chronological timelines
- Content warnings and moderation tools
- Rich third-party app ecosystem
pump.io
pump.io is a stream server that lets users post activities to their followers and to the web, implementing the Activity Streams format. It can be self-hosted as a personal social networking node.
- Activity Streams social server
- Personal social networking node
- Federation support
Mastodon vs pump.io: key differences
Mastodon is written in Ruby, while pump.io is built with JavaScript. Licensing differs — AGPL-3.0 for Mastodon versus Apache-2.0 for pump.io. Pump.io is the lighter option, starting around 256 MB of RAM against 2,048 MB for Mastodon. Pump.io is the more established project (first released 2013), while Mastodon arrived in 2016. Mastodon has the considerably larger community, at 50,319 GitHub stars versus 2,237. Mastodon lists first-class Docker deployment; pump.io does not.
Why pick each one
Choose Mastodon if…
- Large fediverse network
- Strong moderation features
Watch out for
- Resource-heavy to host
- Operationally complex
Choose pump.io if…
- Released under the Apache-2.0 license
- Active community (2.2k GitHub stars)
- Written in JavaScript
- Tiny footprint — runs in 256 MB RAM
Frequently asked questions
Is Mastodon or pump.io better?
Neither is universally better. Mastodon has the larger community, while pump.io is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Mastodon and pump.io free and open-source?
Yes. Mastodon is licensed under AGPL-3.0 and pump.io under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Mastodon and pump.io with Docker?
Mastodon: yes. pump.io: check the project docs for container support.
Which is lighter on resources, Mastodon or pump.io?
pump.io has the smaller minimum footprint at 256 MB of RAM, compared to about 2,048 MB for Mastodon. Real-world usage depends on library size, user count, and enabled features.