Plume

Plume creates a branched copy of your Postgres database per preview deployment. Like Git branches but for data. Used in 4 production setups I know of. I built it because Neon's branching was expensive and Supabase didn't have it. The interesting engineering was the copy-on-write at the table level. I'm leaving because the company I built this for is shutting down and the use case at my new job doesn't need it.