## Startup showcase (1-1 of 1)

### Bluesky
Open social media, built on the AT Protocol

18,361 GitHub stars (bluesky-social/social-app, MIT, 2026-10-28) · App Store 3.9/5 from 13,801 ratings (2026-10-28)

Website + app · Social & community · by Bluesky · launched 2022-06-07. https://bsky.app

- Mobile: React Native, Expo
- Backend: AT Protocol
- Analytics: GrowthBook (`growthbook`)
- Monitoring: Bitdrift, Sentry (`sentry`, priced)

Most used: AT Protocol (1), Bitdrift (1), Expo (1), GrowthBook (1), React Native (1), Sentry (1).

**Caveats (show these word for word)**
- Stacks are read from each product's public code (manifests and environment templates) on the date shown; a service listed there may be optional or used only by the hosted version. GitHub and App Store figures are as read on their checked_at date.

Confidence: medium.

Use estimate_cost or audit_stack with the priced vendor ids to see what a stack like this costs.