Marek here from bunny.net. We’re not saying SQLite is universally better than Postgres. The trade-off we’re optimizing for is cost model and operational simplicity.

Even as a managed service, Postgres DBaaS still tends to push users into capacity planning, instance tiers, and paying for idle headroom. Using a SQLite-compatible engine lets us offer a truly usage-based model with affordable read replication and minimal idle costs.