Vector Databases
Databases and search engines purpose-built for storing and querying high-dimensional embedding vectors.
Scoring method (open_source_ai_tools_v1): 40% GitHub activity (time-decay since last push) + 40% stars (log-normalized within category) + 20% license permissiveness, minus 5 points if archived. Last generated: 2026-11-08T07:01:40.632225+00:00
#1
10.0
Milvus
Open-source vector database built for scalable similarity search
+ 46612 GitHub stars (top of category)
+ recently active
+ permissive license (Apache-2.0)
#2
9.89
Qdrant
Vector similarity search engine and database
+ 35467 GitHub stars (top of category)
+ recently active
+ permissive license (Apache-2.0)
#3
9.81
Chroma
Open-source embedding database for AI applications
+ 29652 GitHub stars (top of category)
+ recently active
+ permissive license (Apache-2.0)
#4
8.7
pgvector
Open-source vector similarity search extension for PostgreSQL
+ 23617 GitHub stars (top of category)
+ recently active
#5
8.61
Weaviate
Open-source vector database with built-in ML model integrations
+ 16943 GitHub stars (top of category)
+ recently active
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