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“Google's BaaS: auth, Firestore, hosting, functions. Powerful but captive.”
Firebase is still the BaaS reference, but the dependence on Google and the surprise costs at scale are real friction points.
Realtime NoSQL database with synchronization between clients
Chat, live dashboards, collaborative apps without managing WebSockets
Limit: No SQL, data modeling is different from PostgreSQL
Email, Google, Apple, Facebook, phone, anonymous in a few lines of code
Production-ready auth in <1h, with a prebuilt UI (FirebaseUI)
Serverless functions triggered by Firestore, HTTP, Auth events...
Server-side business logic without managing a server
Limit: Cold starts of up to 3 to 5 seconds on rarely called functions
Static and dynamic deployment with a global CDN, automatic SSL
Deploy a Next.js or React app with one command, CDN included
JSON database synchronized in realtime between all clients
Simple realtime apps (games, online presence), cheaper than Firestore
Limit: Less flexible data model than Firestore, more limited scaling
Each alternative has its own page. See all comparisons.
“The industry standard for mobile BaaS, but surprise costs and vendor lock-in are real frictions at scale.”