#firebase
3
2026-09-22
Show HN: Sealr – E2EE messenger with per-message rules and screenshot blocking
unrated
Sealr is an end-to-end encrypted messenger built on React Native and Firebase. It gives senders absolute post-send control by attaching cryptographic rules (views, expiry, geo-fencing) to each message. We use AES-256-GCM and RSA-OAEP-2048, enforcing permissions via Firestore rules without the server ever reading the content and without any plain-text and media ever being stored on the local device. Screen capture and mirroring is blocked at the OS level.
2026-08-29
Supabase
unrated
The Open Source Firebase Alternative to build backends. Free Plan offers Authentication, Realtime Database & Object Storage.
2026-08-29
TrailBase
unrated
Open, sub-millisecond, single-executable FireBase alternative with type-safe REST & realtime APIs, built-in JS/TS runtime, auth & admin UI. (Demo, Source Code) OSL-3.0 Rust/Docker