Criterion Pinecone Qdrant
CategoryRAG & Vector DatabasesRAG & Vector Databases
In one sentenceFully managed vector database for semantic search and retrieval-augmented generation.Open-source vector search engine written in Rust, available self-hosted or as a managed cloud.
Problem it solvesSearching large collections by meaning rather than exact keywords, without running your own vector infrastructure.Fast similarity search with filters for RAG and search apps, with the option to keep data on your own infrastructure.
Free planYesYes
Developer APIYes — docsYes — docs
Open sourceNoYes
PlatformsWeb console, REST APIDocker, Kubernetes, Qdrant Cloud, Linux, macOS, Windows
Pricing (summary)Starter is free (5 indexes, 2 GB storage, 2M write and 1M read units per month). Builder is $20/month flat. Standard has a $50/month minimum and Enterprise $500/month, with pay-as-you-go storage ($0.33/GB/month), writes and reads above that.
Checked 2026-10-19
The engine is free and open source. Qdrant Cloud has a free-forever single-node cluster; Standard is billed hourly by resources used; Premium, Hybrid and Private Cloud pricing is on request.
Checked 2026-10-19
Strengths
  • Fully managed
  • Generous free Starter limits for prototyping
  • Clear usage rates
  • Permissive open-source licence
  • Flexible deployment options
  • Free cloud tier
Limitations
  • Proprietary, cannot self-host the core product
  • Monthly minimums on paid plans
  • Read/write unit pricing takes effort to estimate
  • Managed pricing is usage-based without published dollar amounts on the pricing page
  • Self-hosting requires operational effort
  • Free cluster is small