Registry › Compare › Concordia vs Multica

Concordia vs Multica

Both are Grade B and 1.7 points apart, so choose on what you weigh most. Concordia leads on transparency and rests on broader evidence; Multica leads on supply-chain integrity and maintenance.

B Concordia 67.6

A library for generative social simulation

google-deepmind/concordia · #433 overall · #5 Multi-Agent Systems · coverage B (3/5)

Choose Concordia if transparency matters most.

+2.3Transparency: OSSF Scorecard 7.8 against 5.0
B vs CEvidence coverage: 3 of 5 independent signal types, against 2

B Multica 65.9

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

multica-ai/multica · #494 overall · #6 Multi-Agent Systems · coverage C (2/5)

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

+1.4Maintenance: last push today, against 1d ago
+1.1Safety / Integrity: 100% of recent commits signed, against 7%

Where they differ

10.1

Safety / IntegrityMultica +1.1

11.2

15.1

TransparencyConcordia +2.3

12.8

18.6

MaintenanceMultica +1.4

20.0

11.8

AdoptionConcordia +0.4

11.4

+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	67.6	65.9
Evidence grade	B	B
Coverage grade	B	C
Overall rank	#433	#494
Rank in Multi-Agent Systems	#5	#6
GitHub stars	1.9k	55.5k
Last updated	1d ago	today
Build provenance	No	No
OSSF Scorecard	7.8 / 10	5.0 / 10
License	Apache-2.0	NOASSERTION
Downloads	920/wk	—
Trust dimensions (points earned)
Safety / integrity / 25	10.1	11.2
Identity & provenance / 18	10.8	10.8
Transparency / 17	15.1	12.8
Maintenance / 20	18.6	20.0
Adoption / 20	11.8	11.4
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 v4.4 →