NVIDIA NeMo Guardrails
https://docs.nvidia.com/nemo/guardrails/about-nemo-guardrails-library/overview
Open-source Python library for adding programmable guardrails to LLM-based applications and agents. It blocks, alters or validates unsafe, off-topic, malicious or policy-violating user inputs and model responses using configuration files, Colang flows and built-in rails.
Active · Verified 2026-10-29 · fresh as of 2026-10-29 · 17 cited facts, 0 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Tier
- T3
- Section
- Guardrails & AI security
- Created
- 2023-04-18 repo fix
- Latest release
- last commit 2026-10-29 repo fix
- License
- Apache-2.0 vendor fix
- GitHub
- https://github.com/NVIDIA-NeMo/Guardrails (7394★) repo fix
- Pricing
- searched not found fix
- Funding
- searched not found fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source vendor fix
- Protocols
- openai-compatible, opentelemetry vendor fix
When to use
Optimised for: searched not found
Anti-fit: searched not found
Pros & cons
Pros
searched not found
Cons
searched not found
Claims & capabilities
The NVIDIA NeMo Guardrails library ( PyPI | GitHub ) is an open-source Python package for adding programmable guardrails to LLM-based applications. Use it to block, alter, or validate unsafe, off-topic, malicious, or policy-violating user inputs and model responses.
Technical surface
- API surface
- searched not found
- Backend storage
- searched not found
- Deployment
- searched not found
- Embedding model
- searched not found
- Multi-tenancy
- searched not found
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- yes
Similar systems
Other guardrails & ai security in the catalog, ranked by inbound references.
- Azure AI Content Safety Prompt Shields T3
Azure AI Content Safety API that detects user prompt attacks and indirect (document) prompt injection aimed at manipulating a model's behavior, alongside groundedness, protected-material and task-adherence checks.
- Amazon Bedrock Guardrails T3
Configurable safeguards that filter harmful text and image content, redact sensitive information, block denied topics and detect hallucinations. They apply consistently across foundation models in Amazon Bedrock and self-hosted or third-party models.
- Google Cloud Model Armor T3
Runtime security service that screens AI prompts, responses and agent interactions for prompt injection, jailbreaks, malicious URLs, sensitive-data leaks and harmful content, with adjustable confidence thresholds.
- CrowdStrike Falcon Guardian (formerly Pangea AI Guard) T3
AI detection and response product that discovers, governs and secures AI agents at runtime across endpoint, cloud and SaaS. It is built on Pangea, which CrowdStrike agreed to acquire in September 2025, and pangea.cloud's AI Guard page now redirects here.
- Guardrails AI T3
Open-source guardrails framework plus the Guardrails Hub of validators that detect policy violations, hallucinations and data leakage in LLM and agent outputs at runtime. Harvey announced its acquisition of Guardrails AI on Sep 8, 2026.
- Presidio T3
Open-source framework for detecting, redacting, masking and anonymizing PII in text, images and structured data, commonly used to scrub prompts and responses around LLMs. Originally a Microsoft project, it has transitioned to community ownership under Data Privacy Stack.
Sources (16 cited facts, 0 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Framework vendor
- What it does & what's distinct Open-source Python library for adding programmable guardrails to LLM-based applications … vendor
- Claims / benefits The NVIDIA NeMo Guardrails library ( PyPI | GitHub ) is an open-source Python package fo… vendor
- Created 2023-04-18 repo
- Latest release last commit 2026-10-29 repo
- License Apache-2.0 vendor
- GitHub https://github.com/NVIDIA-NeMo/Guardrails (7394★) repo
- Mindshare 7394 GitHub stars repo
- OTel yes vendor
- Project & sources https://docs.nvidia.com/nemo/guardrails/about-nemo-guardrails-library/overview ; https:/… vendor
- obs-opentelemetry yes vendor
- licensing-bucket open-source vendor
- taxonomy-three-layer-rollup agent-infra repo
- sdk-languages python registry
- protocol-support openai-compatible,opentelemetry vendor
- maturity beta registry
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-30 Added to the catalog #347
Related systems
References (12)
- Calypso AI (now F5 AI Guardrails) integrates with — NeMo Guardrails docs have a F5 AI Guardrails third-party guardrail page. (verified 2026-10-29)
- Cohere Embed integrates with — NeMo Guardrails docs have a Cohere embeddings provider page. (verified 2026-10-29)
- CrowdStrike Falcon Guardian (formerly Pangea AI Guard) integrates with — NeMo Guardrails docs have a CrowdStrike AIDR third-party guardrail page. (verified 2026-10-29)
- Guardrails AI integrates with — NeMo Guardrails docs have a Guardrails AI third-party guardrail page. (verified 2026-10-29)
- LangChain (framework) integrates with — NeMo Guardrails docs have a LangChain integration page. (verified 2026-10-29)
- LangGraph (orchestration) integrates with — NeMo Guardrails docs have a LangGraph integration page. (verified 2026-10-29)
- Meta Llama Protections (Llama Guard, Prompt Guard, LlamaFirewall) integrates with — NeMo Guardrails docs have a Llama Guard third-party guardrail page. (verified 2026-10-29)
- OpenAI Embeddings integrates with — NeMo Guardrails docs have a OpenAI embeddings provider page. (verified 2026-10-29)
- Patronus AI integrates with — NeMo Guardrails docs have a Patronus Lynx third-party guardrail page. (verified 2026-10-29)
- Presidio integrates with — NeMo Guardrails docs have a Presidio third-party guardrail page. (verified 2026-10-29)
- Prompt Security (SentinelOne) integrates with — NeMo Guardrails docs have a Prompt Security third-party guardrail page. (verified 2026-10-29)
- Sentence Transformers integrates with — NeMo Guardrails docs have a Sentence Transformers embeddings provider page. (verified 2026-10-29)
Referenced by (1)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a NVIDIA NeMo Guardrails integration page. (verified 2026-10-29)