Registry › Compare › Guardrails AI vs NeMo Guardrails

Guardrails AI vs NeMo Guardrails

Both are Grade B and 3.9 points apart, so choose on what you weigh most. Guardrails AI leads on supply-chain integrity and provenance; NeMo Guardrails leads on maintenance and adoption.

B Guardrails AI 76.4

Adding guardrails to large language models.

guardrails-ai/guardrails · #226 overall · #5 Security & Guardrails · coverage A (4/5)

Choose Guardrails AI if supply-chain integrity and provenance matter most.

+7.2Identity / Provenance: package provenance attested, against none
+6.1Safety / Integrity: package provenance attested, against none

B NeMo Guardrails 72.5

NeMo Guardrails is an open-source toolkit for easily adding programmable guardrails to LLM-based conversational systems.

NVIDIA-NeMo/Guardrails · #308 overall · #6 Security & Guardrails · coverage A (4/5)

Choose NeMo Guardrails if maintenance and adoption matter most.

+5.5Maintenance
+1.0Adoption: 128.1k weekly downloads against 23.5k
+0.9Transparency: OSSF Scorecard 7.1 against 6.0

Where they differ

20.0

Safety / IntegrityGuardrails AI +6.1

13.9

18.0

Identity / ProvenanceGuardrails AI +7.2

10.8

13.6

TransparencyNeMo Guardrails +0.9

14.5

11.7

MaintenanceNeMo Guardrails +5.5

17.2

15.1

AdoptionNeMo Guardrails +1.0

16.1

-2.0

Runtime calibrationNeMo Guardrails +2.0

+0.0

Full evidence table

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

Full evidence

Signal	Guardrails AIguardrails-ai/guardrails	NeMo GuardrailsNVIDIA-NeMo/Guardrails
HVTrust score	76.4	72.5
Evidence grade	B	B
Coverage grade	A	A
Overall rank	#226	#308
Rank in Security & Guardrails	#5	#6
GitHub stars	7.5k	7.3k
Last updated	4d ago	4d ago
Build provenance	Yes	No
OSSF Scorecard	6.0 / 10	7.1 / 10
License	Apache-2.0	NOASSERTION
Downloads	24k/wk	128k/wk
Trust dimensions (points earned)
Safety / integrity / 25	20.0	13.9
Identity & provenance / 18	18.0	10.8
Transparency / 17	13.6	14.5
Maintenance / 20	11.7	17.2
Adoption / 20	15.1	16.1
Runtime capability surface (full matrix)
MCP server	—	—
External providers	3 — Anthropic, Multi-provider (LiteLLM), OpenAI	1 — OpenAI
Requires API keys	Yes	No
Plugin surface	—	—
Provenance drift	Unknown	Unknown

Open in the live compare tool → Guardrails AI profile NeMo Guardrails profile More Security & Guardrails →

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 →