Convex has become a go-to for teams that want a reactive backend with realtime data sync and a tight, code-first developer experience. But the alternatives landscape spans very different philosophies: Supabase centers everything on “real Postgres” with SQL and RLS, Firebase offers the most comprehensive mobile/web app platform (including push, analytics, and hosting), and InstantDB leans into low-latency collaboration with a highly streamlined, AI-friendly workflow. On the more open and self-hostable end, Appwrite aims to be a Firebase-like BaaS you can run yourself, while Turso takes an edge-first route by scaling familiar SQLite patterns into globally distributed apps.
In comparing options, the key considerations were how much power you get in the data model (SQL vs document vs SQLite), how realtime is delivered (and how much operational work it avoids), auth and permissions ergonomics, local development and dashboard usability, portability/lock-in and self-hosting flexibility, and how pricing and scalability behave as projects grow.