OSS Tanbou

Mastodon — a self-hosted social-network server federated through ActivityPub

OSS health 96
About these scores

Discovery score is an unbounded weighted, log-compressed index of stars, watchers, forks, and contributors. Growth momentum is its change over the observed period; OSS health is a 0–100 score from available repository recency, Community Health, and release data.

Stars
50,297
Primary language
Ruby
License
AGPL-3.0
Repository last updated
Sep 13, 2026

Overview

Mastodon is self-hostable microblogging software that connects servers through ActivityPub. As part of the Fediverse, users can follow and reply across different software while using chronological timelines, media, moderation, and APIs.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Combine a local community with federation across the Fediverse

It provides real-time chronological timelines, image and video attachments, private posts, locked accounts, phrase filters, muting, blocking, reports, and moderation. As an OAuth2 provider it exposes REST and Streaming APIs that support a third-party client ecosystem.

Sources: [1]

For communities that want to own policy and data operations

It fits organizations that want to manage registration, moderation rules, branding, and data retention without depending on a central service while still interacting with external instances. Pilot staffing, reports, backups, and federation policy on a small instance.

Sources: [1]

Take responsibility for federation, moderation, and the full stack

The current README requires Ruby 3.3+, PostgreSQL 14+, Redis 7+, Node.js 22+, and FFmpeg 5.1+, with Docker configurations and a standalone guide. A public instance also owns spam and abuse response, legal obligations, media storage, upgrades, and federation decisions. Mastodon uses AGPLv3.

Sources: [1]

Official sources

  1. [1]Mastodon README(2026-09-13)
Supplemental curator note

Selected for separating a name shared with animals and music through the distinctive search vocabulary of ActivityPub, Fediverse, and instances.

Growth

Growth trends · Last 30 days

50,297 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
201
Open PRs
189

Development activity is still being collected.

Built with

Categories and tags

GitHub data

GitHub dataView detailed GitHub data

GitHub Topics

  • mastodon
  • docker
  • microblog
  • activity-stream
  • webfinger
  • social-network
  • activitypub
  • fediverse
  • social-web
Stars
50,297
Forks
7,494
Watchers
711
Open issues
4,355
Primary language
Ruby
License
AGPL-3.0
Repository last updated
Sep 13, 2026
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