Backend-as-a-Service
Supabase
Supabase is an open-source backend platform with Postgres, Auth, Storage, Edge Functions, Realtime, vectors and hosted infrastructure.
Free plan available; Pro and add-ons are priced on supabase.com/pricing, with usage billed above quotas.approx.
Backend-as-a-Service
Firebase
Firebase is a backend-as-a-service for authentication, firestore, realtime database and cloud functions, planning and operational review.
Spark no-cost plan and Blaze pay-as-you-go plan. Do not use the previous $300 paid-from value as a product price.approx.