Hollo 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.
Hollo
Single-user federated microblogging server
VS
ActivityPub for WordPress
Turn a WordPress blog into a fediverse actor
| Feature | Hollo | ActivityPub for WordPress |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 79 · Good | 80 · Excellent |
| Category | Social Networks | Social Networks |
| License | AGPL-3.0 | MIT |
| Language | TypeScript | PHP |
| Setup difficulty | Medium | Easy |
| Min. RAM | 512 MB | 256 MB |
| Deployment | docker, source | source |
| GitHub stars | ★ 489 | ★ 583 |
| First released | 2024 | 2019 |
| Replaces | Twitter, Mastodon | Twitter, Medium |
What are Hollo and ActivityPub for WordPress?
Hollo
Hollo is a federated single-user microblogging server compatible with the Mastodon client API. It is designed for individuals who want their own ActivityPub presence without running a multi-user instance.
- Single-user microblog
- Mastodon API compatible
- ActivityPub federation
- Markdown posts
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
Hollo vs ActivityPub for WordPress: key differences
Hollo is written in TypeScript, while ActivityPub for WordPress is built with PHP. Licensing differs — AGPL-3.0 for Hollo versus MIT for ActivityPub for WordPress. ActivityPub for WordPress is the lighter option, starting around 256 MB of RAM against 512 MB for Hollo. ActivityPub for WordPress is the more established project (first released 2019), while Hollo arrived in 2024. Hollo lists first-class Docker deployment; ActivityPub for WordPress does not.
Why pick each one
Choose Hollo if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Written in TypeScript
- Lightweight — runs in 512 MB RAM
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 Hollo or ActivityPub for WordPress better?
ActivityPub for WordPress is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Hollo if its specific feature set fits your needs better.
Are Hollo and ActivityPub for WordPress free and open-source?
Yes. Hollo is licensed under AGPL-3.0 and ActivityPub for WordPress under MIT. Both can be self-hosted at no software cost.
Can I run Hollo and ActivityPub for WordPress with Docker?
Hollo: yes. ActivityPub for WordPress: check the project docs for container support.
Which is lighter on resources, Hollo or ActivityPub for WordPress?
ActivityPub for WordPress has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Hollo. Real-world usage depends on library size, user count, and enabled features.