Registry › Compare › FAISS vs LanceDB

FAISS vs LanceDB

LanceDB leads on trust: 87.9/100 (Grade A) against 75.6/100 (Grade B), a 12.3-point gap. FAISS leads on adoption; LanceDB leads on supply-chain integrity and provenance.

B FAISS 75.6

A library for efficient similarity search and clustering of dense vectors.

facebookresearch/faiss · #247 overall · #12 Memory & Knowledge · coverage A (4/5)

Choose FAISS if adoption matters most.

+1.6Adoption: 2.9M weekly downloads against 1.8M

A LanceDB 87.9

Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.

lancedb/lancedb · #61 overall · #3 Memory & Knowledge · coverage A (4/5)

Choose LanceDB if supply-chain integrity and provenance matter most.

+12.4Safety / Integrity: 97% of recent commits signed, against 0%
+7.2Identity / Provenance: package provenance attested, against none

Where they differ

7.6

Safety / IntegrityLanceDB +12.4

20.0

10.8

Identity / ProvenanceLanceDB +7.2

18.0

19.8

MaintenanceLanceDB +0.1

19.9

19.7

AdoptionFAISS +1.6

18.1

+4.0

Runtime calibrationFAISS +5.8

-1.8

1 dimension identical: Transparency 13.7 · Full evidence table

An independent, evidence-based trust comparison of FAISS and LanceDB, two Memory & Knowledge projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.

Full evidence

Signal	FAISSfacebookresearch/faiss	LanceDBlancedb/lancedb
HVTrust score	75.6	87.9
Evidence grade	B	A
Coverage grade	A	A
Overall rank	#247	#61
Rank in Memory & Knowledge	#12	#3
GitHub stars	41.3k	11.8k
Last updated	1d ago	1d ago
Build provenance	No	Yes
OSSF Scorecard	6.1 / 10	6.1 / 10
License	MIT	Apache-2.0
Downloads	2.9M/wk	1.8M/wk
Trust dimensions (points earned)
Safety / integrity / 25	7.6	20.0
Identity & provenance / 18	10.8	18.0
Transparency / 17	13.7	13.7
Maintenance / 20	19.8	19.9
Adoption / 20	19.7	18.1
Runtime capability surface (full matrix)
MCP server	—	—
External providers	—	4 — Amazon Bedrock, Cohere, Google Gemini, …
Requires API keys	No	No
Plugin surface	—	plugins
Provenance drift	Match	Unknown

Open in the live compare tool → FAISS profile LanceDB profile More Memory & Knowledge →

How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption, scaled by an evidence-confidence factor. Grade bands: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Signals refresh daily. Full methodology v4.4 →