A detailed technical comparison of Neon and Supabase as managed Postgres platforms in 2026. Neon is a serverless Postgres engine with disaggregated compute/storage, copy-on-write branching, autoscaling, and scale-to-zero billing. Supabase is a backend-as-a-service bundling auth, realtime, storage, edge functions, and auto-generated APIs around a dedicated Postgres VM. Key differences covered include branching semantics (Neon's full-data COW vs Supabase's schema-only branches), pricing models (usage-based vs fixed per-project), connection pooling approaches, PITR, read replicas, AI/MCP tooling, and application-layer services. The verdict: choose Neon for pure serverless Postgres needs (CI environments, bursty workloads, RDS migrations, agent tooling); choose Supabase when the bundled BaaS stack saves meaningful integration time.