Registry › Compare › FAISS vs Mem0

FAISS vs Mem0

Mem0 leads on trust: 84.2/100 (Grade A) against 75.6/100 (Grade B), a 8.6-point gap. FAISS leads on transparency and maintenance; Mem0 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 transparency and maintenance matter most.

+3.9Maintenance: last push 1d ago, against 4d ago
+0.5Transparency: OSSF Scorecard 6.1 against 5.5

A Mem0 84.2

The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps. Context that persists. Built for production.

mem0ai/mem0 · #108 overall · #10 Memory & Knowledge · coverage A (4/5)

Choose Mem0 if supply-chain integrity and provenance matter most.

+11.8Safety / Integrity: 100% of recent commits signed, against 0%
+7.2Identity / Provenance: package provenance attested, against none

Where they differ

7.6

Safety / IntegrityMem0 +11.8

19.4

10.8

Identity / ProvenanceMem0 +7.2

18.0

13.7

TransparencyFAISS +0.5

13.2

19.8

MaintenanceFAISS +3.9

15.9

19.7

AdoptionFAISS +0.2

19.5

+4.0

Runtime calibrationFAISS +5.8

-1.8

Full evidence table

An independent, evidence-based trust comparison of FAISS and Mem0, 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	Mem0mem0ai/mem0
HVTrust score	75.6	84.2
Evidence grade	B	A
Coverage grade	A	A
Overall rank	#247	#108
Rank in Memory & Knowledge	#12	#10
GitHub stars	41.3k	68.3k
Last updated	1d ago	4d ago
Build provenance	No	Yes
OSSF Scorecard	6.1 / 10	5.5 / 10
License	MIT	Apache-2.0
Downloads	2.9M/wk	885k/wk
Trust dimensions (points earned)
Safety / integrity / 25	7.6	19.4
Identity & provenance / 18	10.8	18.0
Transparency / 17	13.7	13.2
Maintenance / 20	19.8	15.9
Adoption / 20	19.7	19.5
Runtime capability surface (full matrix)
MCP server	—	Implemented
External providers	—	14 — Amazon Bedrock, Anthropic, Cohere, …
Requires API keys	No	Yes
Plugin surface	—	plugins
Provenance drift	Match	Partial

Open in the live compare tool → FAISS profile Mem0 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 →