Retrieval frameworks, vector databases, and data systems used in AI stacks.
GitHub stars among selected RAG/vector/data infrastructure alternatives.
Ranked alternatives
Popularity-ranked entries linked back to graph nodes and deterministic sources.
| Rank | Component | Kind | Openness | Popularity metric | Tasks | Source |
|---|---|---|---|---|---|---|
| 1 | LangChainsoftware:langchain | software | open source | 138,900GitHub stars as of 2026-06-10 | rag, agents | source |
| 2 | LlamaIndexsoftware:llamaindex | software | open source | 50,046GitHub stars as of 2026-06-10 | rag | source |
| 3 | Milvussoftware:milvus | software | open source | 44,703GitHub stars as of 2026-06-10 | vector-search | source |
| 4 | FAISSsoftware:faiss | software | open source | 40,241GitHub stars as of 2026-06-10 | vector-search | source |
| 5 | Qdrantsoftware:qdrant | software | open source | 31,982GitHub stars as of 2026-06-10 | vector-search | source |
| 6 | Chromasoftware:chroma | software | open source | 28,330GitHub stars as of 2026-06-10 | vector-search | source |
| 7 | Haystacksoftware:haystack | software | open source | 25,506GitHub stars as of 2026-06-10 | rag | source |
| 8 | pgvectorsoftware:pgvector | software | open source | 21,681GitHub stars as of 2026-06-10 | vector-search | source |
| 9 | Weaviatesoftware:weaviate | software | open source | 16,303GitHub stars as of 2026-06-10 | vector-search | source |
| 10 | LanceDBsoftware:lancedb | software | open source | 10,555GitHub stars as of 2026-06-10 | vector-search | source |