Mastodon vs ActivityPub for WordPress
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
ActivityPub for WordPress
Turn a WordPress blog into a fediverse actor
| Feature | Mastodon | ActivityPub for WordPress |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 100 · Excellent | 80 · Excellent |
| Category | Social Networks | Social Networks |
| License | AGPL-3.0 | MIT |
| Language | Ruby | PHP |
| Setup difficulty | Hard | Easy |
| Min. RAM | 2,048 MB | 256 MB |
| Deployment | docker, bare-metal, source | source |
| GitHub stars | ★ 50,319 | ★ 583 |
| First released | 2016 | 2019 |
| Replaces | Twitter, X | Twitter, Medium |
What are Mastodon and ActivityPub for WordPress?
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
ActivityPub for WordPress
The ActivityPub plugin lets a self-hosted WordPress site federate with the fediverse, so people can follow blog posts from Mastodon and other ActivityPub software. It also delivers comments back as replies.
- Federates WordPress posts
- Follow blogs from Mastodon
- Comments as replies
- Official Automattic plugin
Mastodon vs ActivityPub for WordPress: key differences
Mastodon is written in Ruby, while ActivityPub for WordPress is built with PHP. Licensing differs — AGPL-3.0 for Mastodon versus MIT for ActivityPub for WordPress. ActivityPub for WordPress is the lighter option, starting around 256 MB of RAM against 2,048 MB for Mastodon. Mastodon is the more established project (first released 2016), while ActivityPub for WordPress arrived in 2019. Mastodon has the considerably larger community, at 50,319 GitHub stars versus 583. Mastodon lists first-class Docker deployment; ActivityPub for WordPress 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 ActivityPub for WordPress if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- Written in PHP
- Tiny footprint — runs in 256 MB RAM
Frequently asked questions
Is Mastodon or ActivityPub for WordPress better?
Neither is universally better. Mastodon has the larger community, while ActivityPub for WordPress is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Mastodon and ActivityPub for WordPress free and open-source?
Yes. Mastodon is licensed under AGPL-3.0 and ActivityPub for WordPress under MIT. Both can be self-hosted at no software cost.
Can I run Mastodon and ActivityPub for WordPress with Docker?
Mastodon: yes. ActivityPub for WordPress: check the project docs for container support.
Which is lighter on resources, Mastodon or ActivityPub for WordPress?
ActivityPub for WordPress 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.