Mastodon

Use Mastodon to run a decentralized social media service described as free and open source.

joinmastodon.org
Mastodon homepage screenshot

About Mastodon

Mastodon is a decentralized social networking service. It is made up of independent servers that can communicate with each other, so an account on one server can follow and be followed by people on other Mastodon servers. The homepage says a user's home feed shows posts in chronological order, with no algorithms or ads, and that users can follow anyone across any Mastodon server from one account.

Users can post audio, video and pictures, add accessibility descriptions, and use polls, content warnings, animated avatars, custom emojis and thumbnail crop control. Each server sets its own rules, which are enforced locally rather than across the whole network. The homepage also says Mastodon can be deployed on your own infrastructure, which lets an operator run a server. The homepage describes Mastodon as free and open-source software and says the service does not serve ads, though the source does not describe the service's data handling in detail, so privacy and safety depend on the server a user joins.

Key features

  • Chronological home feed with no algorithms or ads
  • Follow accounts on any Mastodon server from one account
  • Audio, video and picture posts with accessibility descriptions
  • Polls, content warnings, animated avatars and custom emojis
  • Thumbnail crop control for posts
  • Self-hosting on your own infrastructure with interoperability via ActivityPub
Best for: People who want to follow and post across independent community servers, each with its own rules, and people who want to run their own server.
Good for
  • Home feed shows posts in chronological order, without algorithms or ads, according to the homepage
  • Supports accessibility descriptions for media posts
  • Moderation rules are set by each server rather than a single company
Watch out for
  • Rules and moderation vary by server, so the experience depends on which server a user joins
  • Hosting a server requires your own infrastructure

Mastodon at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
Web
Open source
Not stated
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

Mastodon alternatives

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Bridgy Fed

fed.brid.gy

Bridgy Fed connects profiles across social networks, bridging Mastodon and other decentralized social platforms.

phanpy

github.com/cheeaun/phanpy

Access Mastodon through Phanpy, a minimalistic web client described by its project repository.

Open source
24 alternatives

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Mastodon FAQ

Do I need to choose a server to join?
The homepage offers joining mastodon.social or picking another server. Each server creates its own rules and regulations.
Can I follow people on other servers?
Yes. The homepage says you can follow anyone across any Mastodon server from a single account.
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