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hardSystem Design

pgvector vs Pinecone vs Qdrant: how do you choose a vector DB in 2025?

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01

Understand the problem

Self-hosted Postgres vs managed ANN — scale, cost, filtering, and tenancy trade-offs.

vectordbpgvector
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

pgvector for <5M vectors + strong OLTP needs; Pinecone/Qdrant for >10M, heavy filtering, and serverless scale. Do not pick on hype — measure QPS, filter selectivity, and tenancy.

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04

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