BlueSky

Decentralized Application

Decentralized microblogging social app built on the AT Protocol; users share posts, images and videos across a composable, algorithm-choice feed ecosystem

Company
Links
Visit Website See this tool in the graph Suggest an edit

Details

License Permissive — MIT/Apache (github.com/bluesky-social)
Dev Status 🟢 Active
Dev Status Detail Released / Active — 20M+ registered users on bsky.app; iOS, Android, and web clients; AT Protocol production deployment with open federation; IETF standardization track initiated September 2025
Owner Bluesky Social PBC (Jay Graber, CEO); board includes Jeremie Miller, Mike Masnick, Kinjal Shah (Blockchain Capital)
Owner - List
  • Bluesky Social PBC
Governing Body Company-controlled (Bluesky Social PBC — Public Benefit Corporation)
Country USA
Start Year 2019
Stack TypeScript + React Native (mobile); Go (some backend services)
Funding VC
Last Investigated Mar 9, 2026

Topology view

This tool in the centre and the things it is directly related to. Each line names the kind of relationship.

Topology view: BlueSkyThis tool in the centre and the things it is directly related to. Each line names the kind of relationship.BlueSkyATproto (Basis for, Built on)ATprotoBitchat (Basis for)BitchatBluesky Social PBC (Developed by)BlueskySocial PBCDIDs (Identity primitive for)DIDsdid:scid (Interoperates with)did:scid
  • ATproto (Tool): Basis for, Built on
  • Bitchat (Tool): Basis for
  • Bluesky Social PBC (Organization): Developed by
  • DIDs (Tool): Identity primitive for
  • did:scid (Tool): Interoperates with

Open in Graph Explorer

Use Case Domains

Communication

Affordances

Protocol federation Sovereign identity Data portability

Decentralized Application Attributes

Owner - List
  • Bluesky Social PBC
Origins Social Network; originated as Twitter-funded decentralized social media research initiative
Database DAG (AT Protocol Merkle trees / repo structure; Personal Data Servers store user repos)
Query Language Custom (AT Protocol Lexicon / XRPC queries)
Data Formats Custom (DAG-CBOR + AT Protocol Lexicons)
Collaborative Live Editing N/A
Rich Text Editing No (basic text with images/video attachments; 3-min video support added March 2025)
Mobile Support Yes (iOS + Android native apps)
Web Support Yes (bsky.app)
Native Apps No official desktop app; third-party clients exist (Beeskie, Skeetdeck)
Terms Free SaaS (bsky.app) + self-hosting possible via AT Protocol PDS
Funds $36M total across 3 rounds: $13M initial (Twitter backing), $8M seed 2023, $15M Series A October 2024 (led by Blockchain Capital)
Based On AT Protocol
Use Case Category Social Network
User Interface Type Timeline/Feed with custom algorithmic feeds, Starter Packs, Trending Topics
Offline Capabilities Read-only offline
Collaboration Features N/A
Data Portability Full export (AT Protocol ensures account portability; data stored in user-controlled PDS repos)
Integration Ecosystem API integrations + third-party clients + ATmosphere developer ecosystem (Smoke Signal, Bluecast, Skyfeed)
Web2 Data Export N/A
Prosocial Coherence Moderation tools + community labelling + Trusted Verifiers verification system (April 2025)
Economic Flows N/A (subscription model planned; custom domain hosting as initial revenue)
Governance & Decision Making Company-controlled (PBC — Public Benefit Corporation)
Media / Publishing Yes (posts, images, video up to 3 min)
Knowledge Management No
Sensemaking No
Project Management No
Communication Model Public broadcast with algorithmic feed curation; DMs; speech/reach separation via AT Protocol labeling system
Network Resilience Federated (AT Protocol PDS servers; Relay/AppView architecture); users can self-host PDS
Discovery Mechanism AT Protocol Relay indexes public content; custom feeds, Starter Packs, Trending Topics, Explore feature
Max Participants Open (25M+ registered users as of Dec 2024; ~1.5M DAU as of Sep 2025)
Data Sovereignty User data stored in personal AT Protocol repos (PDS); account portability between servers; self-hosting possible

Relationships

How this tool connects to other tools and organizations, from relationships reviewed by the OpenHaven data steward. They describe how projects connect, not how good they are.

Built on
Developed by
  • Bluesky Social PBC
Interoperates with
Basis for
Identity primitive for