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Bluesky Counter

Mastodon vs Bluesky: Which Decentralized Network is Better?

By DEVBUILDTOOLโ€ข

The great debate in decentralized social media is Mastodon vs Bluesky. While both aim to provide a refuge from corporate-controlled social networks, they take entirely different architectural and cultural approaches. Here is how they stack up.

The Protocols: ActivityPub vs AT Protocol

Mastodon runs on ActivityPub, a W3C standard. It uses a "federated" model similar to email. You join a specific server (an "instance"), and your identity is tied to that server (e.g., @[email protected]). If that server shuts down, you have to create a new account elsewhere. You can migrate followers, but your old posts are lost.

Bluesky runs on the AT Protocol. It uses a "self-authenticating" model. Your identity is a cryptographic key (DID) that exists independently of the server hosting your data. If you move from one server (PDS) to another, your entire account, including all past posts, moves seamlessly with you.

Character Limits and Formatting

In the Mastodon vs Bluesky posting experience, limits vary:

  • Mastodon: 500 characters by default (some servers allow more). URLs are wrapped and count as 23 characters.
  • Bluesky: 300 graphemes. URLs are NOT wrapped and consume their full character length. Emoji count as 1 grapheme.

Discovery and Algorithms

Mastodon is heavily chronological. You have a Home feed (people you follow), a Local feed (people on your server), and a Federated feed (people across servers your server knows about). There are no algorithms pushing content to you.

Bluesky embraces algorithms, but with a twist: they are open. You can subscribe to "Custom Feeds" built by the community. You choose the algorithm that dictates what you see.

Which Should You Choose?

Choose Mastodon if you value chronological feeds, smaller community-moderated spaces, and an established W3C standard protocol.

Choose Bluesky if you want true account portability, custom algorithmic feeds, global search, and the ability to use your own domain name as your handle.

If you post to both, use our Mastodon vs Bluesky Comparison Tool to ensure your drafts fit the character constraints of both networks.