RAG & vector databases
Retrieval infrastructure
Vector stores, embedding indexes, and retrieval pipelines that ground LLM responses in your data.
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#01
Pinecone
· Pinecone Recommended FeaturedManaged vector database that pioneered the category. Serverless tier with pay-per-use pricing makes it the easiest production-grade vector store.
AIMenta — Default choice for production RAG when you don't want to run a database yourself. At very high scale, self-hosted alternatives win on unit economics.
Freemium · Free starter; pay-as-you-go from US$0.33/M reads · API · Free tier · Since 2019 -
#02
LlamaIndex
· LlamaIndex RecommendedRAG-first LLM framework. LlamaParse for document parsing is genuinely class-leading; LlamaCloud handles managed RAG infrastructure.
AIMenta — Pick this if document parsing and RAG quality dominate your use case. LangChain for broader agent work.
Open source · Free OSS; LlamaCloud usage-based · API · Free tier · Self-host · Since 2022 -
#03
Qdrant
· Qdrant RecommendedRust-built vector database focused on performance and quantization. Strong default if you want raw speed and open source.
AIMenta — A serious choice for performance-sensitive deployments. Benchmarks well against the alternatives.
Open source · Free OSS; Cloud free 1GB; pay-per-use · API · Free tier · Self-host · Since 2021 -
#04
Weaviate
· Weaviate RecommendedOpen-source vector database with strong hybrid search and built-in modules for vectorization. Self-hostable; managed cloud option for production.
AIMenta — The strongest open-source option. Pick this when you want production-grade vector search without vendor lock-in.
Open source · Free OSS; Cloud Sandbox free; Standard US$25/mo · API · Free tier · Self-host · Since 2019 -
#05
Chroma
· Chroma Decent fitDeveloper-friendly vector database. Easiest to start with for prototyping; cloud product still in beta.
AIMenta — Excellent starting point for RAG prototypes. For production at scale, migrate to Pinecone, Weaviate, or Qdrant.
Open source · Free OSS; Cloud beta · API · Free tier · Self-host · Since 2022 -
#06
Cohere
· Cohere Decent fitEnterprise-focused LLM provider with strong RAG and embedding models. Notable for private deployment options and a focus on regulated-industry customers.
AIMenta — Strong choice when retrieval quality and private deployment matter more than raw frontier reasoning. Their rerank model is class-leading.
Usage-based · Command R+ ~US$2.50/M input · API · Free tier · Since 2019 -
#07
Milvus
· Zilliz Decent fitMature open-source vector database with strong scaling characteristics. Zilliz Cloud is the managed service. Popular in China and APAC.
AIMenta — Pick this for billion-scale vector workloads or when APAC presence matters. Below that, simpler options are easier.
Open source · Free OSS; Zilliz Cloud Standard US$0.10/hr · API · Free tier · Self-host · Since 2019