AP
Backend
Appwrite
Open-source backend platform for auth, databases, functions, and storage.
iOSAndroidWebReact NativeFlutterA free cloud tier, a Pro plan from $25 per month with metered overages, and custom Enterprise pricing; the open-source server is free to self-host.
Best for
- -Open-source backend
- -Self-hosting option
- -Auth and storage
Pricing checked Jul 19, 2026
FI
Backend
Firebase
Google-backed backend, analytics, crash reporting, and messaging suite.
iOSAndroidWebUnityFlutterThe Spark plan is free within generous quotas; the Blaze plan adds metered pay-as-you-go pricing through Google Cloud, while analytics and Crashlytics stay free on both.
Best for
- -Google ecosystem apps
- -Realtime app backends
- -Crashlytics
Pricing checked Jul 19, 2026
SU
Backend
Supabase
Open-source backend platform with Postgres, Auth, Storage, and Edge Functions.
iOSAndroidWebReact NativeFlutterFree tier for small projects; Pro is $25 per month with usage-based overages; Team is $599 per month; Enterprise is custom.
Best for
- -Auth
- -Postgres
- -Rapid backend setup
Pricing checked Jul 19, 2026