SHSelfHostIndex

Hollo

Single-user federated microblogging server

Social Networks ★ 493 stars Medium setup AGPL-3.0

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.

Official siteSource code

Key features

  • Single-user microblog
  • Mastodon API compatible
  • ActivityPub federation
  • Markdown posts

Strengths

  • Released under the AGPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in TypeScript
  • Lightweight — runs in 512 MB RAM

Is Hollo secure?

No known vulnerabilities affect Hollo's latest release (0.9.23). OSV.dev lists 2 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2026-25808, published 2026-02-09 (247 days ago), fixed in 0.6.20, 0.7.2

Source: OSV.dev, checked 2026-10-14. How this is measured.

Hollo replaces

Self-hosted Twitter alternativesSelf-hosted Mastodon alternatives

Health badge

Maintain Hollo? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 83 · excellent

Markdown
[![SelfHostIndex health score for Hollo](https://selfhostindex.com/badge/hollo-social.svg)](https://selfhostindex.com/app/hollo-social/)
HTML
<a href="https://selfhostindex.com/app/hollo-social/"><img src="https://selfhostindex.com/badge/hollo-social.svg" alt="SelfHostIndex health score for Hollo"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/hollo-social.svg
   :alt: SelfHostIndex health score for Hollo
   :target: https://selfhostindex.com/app/hollo-social/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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