Bluesky
Decentralized social network built on the open AT Protocol, founded by Jack Dorsey's Twitter spinout
Consumer
📍 Seattle, WA
Founded 2019
Current Valuation
$700M
as of 2025-Q4
PRIVATE
Bluesky is the decentralized social network spun out of Twitter in 2021 under Jay Graber, built on the open AT Protocol that lets users move their identity and posts across servers. Raised $100M Series B in late 2025 led by Bain Capital Ventures at a $700M valuation. User base surged past 43M and the company is building an 'Atmosphere' ecosystem of interoperable third-party apps - a direct alternative to X's closed graph.
Company Profile
Growth
43M+ users, monetization in development
Last Round
Series B — $100M (Nov 2025) · Lead: Bain Capital Ventures
Founders & Key People
Jay Graber
Investors
Bain Capital Ventures · Blockchain Capital · Alumni Ventures · Jack Dorsey (founding sponsor)
Products
- Bluesky social app
- AT Protocol (open-source)
- Personal Data Servers (PDS)
- Feed generators
- Atmosphere ecosystem of third-party apps
Competitors
X (Twitter) · Threads (Meta) · Mastodon · Nostr · Farcaster
Social MediaDecentralizedOpen ProtocolConsumer
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2025-Q4. Refreshed quarterly.