Registry › Compare › Concordia vs Multica

Concordia vs Multica

Both are Grade B and 0.2 points apart, so choose on what you weigh most. Concordia leads on transparency and rests on broader evidence; Multica leads on maintenance and supply-chain integrity. Note: Multica's evidence coverage is thinner (coverage C vs B) — its score rests on fewer independent signal types.

B Concordia 65.5

A library for generative social simulation

google-deepmind/concordia · #454 overall · #8 Multi-Agent Systems · coverage B (3/5)

Choose Concordia if transparency matters most.

+2.2Transparency: OSSF Scorecard 7.6 against 5.0
B vs CEvidence coverage: 3 of 5 independent signal types, against 2

B Multica 65.7

Make humans and AI agents work as one team — open-source and self-hostable.

multica-ai/multica · #451 overall · #7 Multi-Agent Systems · coverage C (2/5)

Choose Multica if maintenance and supply-chain integrity matter most.

+2.7Maintenance: last push 1d ago, against 3d ago
+1.4Safety / Integrity: 100% of recent commits signed, against 7%

Where they differ

9.8

Safety / IntegrityMultica +1.4

11.2

15.0

TransparencyConcordia +2.2

12.8

17.2

MaintenanceMultica +2.7

19.9

11.5

AdoptionConcordia +0.2

11.3

+1.2

Runtime calibrationConcordia +1.5

-0.3

1 dimension identical: Identity 10.8 · Full evidence table

An independent, evidence-based trust comparison of Concordia and Multica, two Multi-Agent Systems projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.

Full evidence

Signal	Concordiagoogle-deepmind/concordia	Multicamultica-ai/multica
HVTrust score	65.5	65.7
Evidence grade	B	B
Coverage grade	B	C
Overall rank	#454	#451
Rank in Multi-Agent Systems	#8	#7
GitHub stars	1.7k	51.4k
Last updated	3d ago	1d ago
Build provenance	No	No
OSSF Scorecard	7.6 / 10	5.0 / 10
License	Apache-2.0	NOASSERTION
Downloads	589/wk	—
Trust dimensions (points earned)
Safety / integrity / 25	9.8	11.2
Identity & provenance / 18	10.8	10.8
Transparency / 17	15.0	12.8
Maintenance / 20	17.2	19.9
Adoption / 20	11.5	11.3
Runtime capability surface (full matrix)
MCP server	Declared	Declared
External providers	6 — Amazon Bedrock, Anthropic, Google Gemini, …	—
Requires API keys	No	No
Plugin surface	—	plugins
Provenance drift	Match	—

Open in the live compare tool → Concordia profile Multica profile More Multi-Agent Systems →

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 v4.3 →