Rivestack

Managed Postgres with pgvector on dedicated NVMe, pitched as a cheaper RAG backend than Pinecone or Supabase.

Freemium· Free shared tier; Solo $15/mo, Starter $35, Growth $59, Scale $99 (EU Central)RAGOpenAI embeddings (auto-embeddings)

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Best for

Pick Rivestack if you want a cheap, fast managed pgvector host for a RAG app and prefer one Postgres over a separate vector DB.

Skip if

Skip it if you need billion-scale vector search, US/APAC-region nodes, or a managed RAG framework rather than raw infrastructure.

Rivestack is a managed PostgreSQL service tuned for vector workloads. It ships with pgvector + HNSW indexes preconfigured on dedicated NVMe nodes, an auto-embeddings feature that turns inserted text into OpenAI vectors on the fly, and a spreadsheet-style table editor for poking at rows without writing SQL. Because it's just Postgres under the hood, any standard driver (Python, Node, Go, Java, Rust, .NET) talks to it directly, and Terraform is supported for cluster provisioning.

The pitch is aimed squarely at RAG teams who've felt the bill from Pinecone, Supabase, or Neon and want to collapse their vector store and relational data into one box. Pricing starts at a free shared tier with no card required, climbs through a $15/mo Solo plan, and tops out around $99/mo for a Scale node rated for roughly 1M vectors at ~1,000 QPS and 3.7ms p50. There's a live RAG demo running against 30 days of Hacker News for sanity-checking the latency claims.

It is infrastructure, not an AI model, so you bring your own embedding pipeline (or lean on the bundled OpenAI auto-embeddings) and your own LLM for generation. Best treated as a drop-in pgvector host rather than a full RAG framework.

Editor's take

A no-nonsense managed Postgres play for the pgvector crowd that's been priced out of Pinecone. The dedicated-NVMe angle is the real differentiator, and the numbers they quote are credible for the price. Just remember you're buying a database, not a RAG stack.

— The AI Tool Bible editorial team