Bluesky provides an open, decentralized social networking protocol (AT Protocol) that lets developers build interoperable microblogging applications sharing a common user graph. The protocol uses decentralized identifiers, content‑addressed storage, and federated moderation to enable portable accounts, data portability, and secure, verifiable posts across participating services. It offers public REST and GraphQL APIs for third‑party clients, analytics tools, and bots.
Funding
Funding not disclosed
Founders
Product
Problem
Centralized social platforms retain user data, enforce proprietary APIs, and restrict cross‑service interaction, which limits user control, data portability, and the ability to build interoperable social experiences.
Solution
Bluesky implements an open, decentralized social networking protocol that enables any developer to create interoperable microblogging applications. The protocol defines a standard data model, authentication mechanisms, and content addressing so that users can move their accounts and content across services without friction. Cryptographic signatures verify the integrity of posts and identities, while the network’s federated architecture distributes storage and moderation responsibilities. By exposing a public API, Bluesky allows third‑party clients to read and write to the same social graph, fostering a competitive ecosystem of apps that share a common user base.
Target Audience
The primary customers are developers and product teams building social or community applications, as well as end users who want a microblogging experience that is not locked into a single proprietary platform.
Features
- AT Protocol specification with modular, extensible data schemas for posts, likes, follows, and media
- Decentralized identifier (DID) system that ties user identities to cryptographic keys, enabling portable accounts
- Content‑addressed storage using Merkle‑based structures to ensure immutability and efficient synchronization
- Federated moderation framework that supports server‑side policies, user‑controlled filters, and transparent reporting
- Open REST and GraphQL APIs allowing developers to build native clients, analytics tools, and bots on the same network
- Built‑in data portability tools for exporting and importing user histories across participating services
- End‑to‑end encryption for direct messages and optional private groups
- Scalable peer‑to‑peer replication layer that distributes load across participating servers