LanceDB alternatives
6 rag tools in the same lane as LanceDB, ranked by editorial score.
DV
Databricks Vector Search
RAG · Multi-model (BYO embeddings or Databricks-hosted)
8.1
Managed hybrid vector search that lives inside the Databricks lakehouse and auto-syncs with your source tables.
Enterprise· Standard: $605 · Storage Optimized: $922rag-retrievalhybrid-search
DA
DataStax Astra DB
RAG · Bring-your-own embeddings; integrates with OpenAI, Cohere, Hugging Face, Mistral, NVIDIA NIM, and Vertex AI via server-side vectorize
8.6
Serverless vector and document database for production RAG and AI agents
Freemium· Small On-Demand: Contact sales · Medium (Balanced): Contact sales · Medium (Storage Optimized): Contact sales · Large (Balanced): Contact sales · Large (Storage Optimized): Contact salesRAG chatbot over enterprise documentsAgent long-term memory store
RI
Rivestack
RAG · OpenAI embeddings (auto-embeddings)
7.1
Managed Postgres with pgvector on dedicated NVMe, pitched as a cheaper RAG backend than Pinecone or Supabase.
Freemium· Free: $0/month · Solo: $29/month · HA Cluster: Starting at $49/node/monthrag-backendvector-search
PO
PostgresML
RAG · Multi-model (Llama, Mistral, open-source embeddings)
7.1
PostgreSQL extension that runs embeddings, vector search, and LLM inference inside your database.
Freemium· Serverless: From $7.50 per query hour · Dedicated: From $0.60 per instance hour · Enterprise: Custom pricingvector-searchrag
LC
Langchain-Chatchat
RAG · Multi-model (GLM-4, Qwen2, Llama 3, etc. via Xinference/Ollama/LocalAI/FastChat)
7.4
Self-hostable RAG and agent framework that wires LangChain to any local open-source LLM and a knowledge base.
Free· Apache-2.0 open source; self-hosted, infra costs onlyprivate-knowledge-baseoffline-rag
SU
Supabase
RAG
Open-source Firebase alternative built on Postgres with a first-class pgvector AI toolkit.
Freemium· Free: $0 · Pro: $25 · Team: $599 · Enterprise: CustomRAG chatbot backendsemantic document search