ActivityPub vs AT Protocol

What is the difference between Mastodon's ActivityPub and BlueSky's AT Protocol? Here are more of my thoughts about why the Mastodon business model doesn't make sense for community run servers https://justingarrison.com/blog/2023-04-24-mastodon-is-doomed/ ActivityPub website https://activitypub.rocks/ AT Protocol website https://atproto.com/ 0:00 - Decentralization protocols 0:40 - What is ActivityPub? 2:40 - How ActivityPub works 9:28 - What is AT Protocol? 10:12 - How AT Protocol works 21:57 - How to integrate with decentralized networks 25:22 - Other resources #activitypub #atproto #socialmedia