Rivestack – Managed PostgreSQL with pgvector, $29/mo
It spins up dedicated Postgres instances with pgvector pre-installed, uses Patroni for HA and pgBackRest for snapshots, and publishes concrete vector benchmarks (2k QPS @ <4ms for 10k vectors; 252 QPS at 1M). The stack choices (Hetzner NVMe, read replicas, HNSW) feel pragmatic for teams who don't want serverless/shared trade-offs, though I'd want clearer SLA/multi-region details and independent benchmarks at larger scales before moving critical workloads.
