Saved 30% on Database Costs: Benchmarking Postgres 17 vs. PlanetScale 5 vs. Fauna 2026

When our 12-person backend team migrated from PlanetScale 5 to Postgres 17 for our 400TB e-commerce workload, we cut monthly database costs by 32% while reducing p99 write latency from 210ms to 89ms. This isn’t a one-off: after benchmarking Postgres ...