The short answer
MongoDB Atlas Vector Search is billed atlas cluster consumption-based. It has a free tier: M0 cluster: 512MB storage, shared. The paid plans we list start at $8-$30/mo (Flex).
Plans and prices
| Plan | Price | What it covers |
|---|---|---|
| Free (M0) | $0/mo | 512 MB storage, shared RAM/vCPU; for learning and prototyping. Vector Search available on shared tiers with limits. |
| Flex | $8-$30/mo | Usage-based ($0.011-$0.041/hr), 5 GB storage, tiered by ops/sec; for dev/test and unpredictable traffic. |
| Dedicated (M10+) | from $0.08/hr (~$57/mo) | M10 = 2 vCPU / 2 GB RAM; scales to M300 (96 vCPU / 384 GB) at $21.85/hr. Required for production with 99.995% SLA. |
| Vector Search Nodes (High-CPU) | $0.12-$3.26/hr per node | Dedicated search compute, billed separately, two-node minimum. S20 ($0.12) to S80 (64 vCPU / 128 GB, $3.26). |
| Vector Search Nodes (Storage-optimized) | ~$1.04/hr for s50 (2 nodes) | s50 = 32 GB RAM / 4 vCPU used in MongoDB benchmarks for scalar-quantized 15.3M-vector workloads. |
How MongoDB Atlas Vector Search bills you
The pricing model is atlas cluster consumption-based. Vector search native to Atlas, letting teams add embeddings to an existing operational DB with no new service. Best suited to: vector search inside operational mongodb.
What to watch for on the bill
- Pricing is the most common complaint across G2/PeerSpot - expensive and hard to predict versus self-hosting
- HNSW indexes need ~1.2-1.5x raw vector size in RAM and must fit in memory, making memory planning critical and upgrades costly
- Production vector workloads require separately-billed Search Nodes with a two-node minimum, adding base cost
The pricing page we read
Source: https://www.mongodb.com/pricing. Prices change, so confirm there before you commit.
Compare MongoDB Atlas Vector Search with alternatives
- Pinecone vs MongoDB Atlas Vector Search pricing
- MongoDB Atlas Vector Search vs Zilliz Cloud (Milvus) pricing
- MongoDB Atlas Vector Search vs Supabase Vector (pgvector) pricing
Other vector database apis: Pinecone, Zilliz Cloud (Milvus), Supabase Vector (pgvector), Qdrant Cloud, Weaviate Cloud.
Looking at quality rather than price? See the MongoDB Atlas Vector Search score on APIbenchmarks. Full entry: MongoDB Atlas Vector Search pricing.