NeMo Guardrails
FreeOpen-source toolkit for adding programmable guardrails to LLM-based conversational systems.
FreeFree tier
About NeMo Guardrails
NeMo Guardrails is an open-source toolkit by NVIDIA for adding programmable guardrails to LLM-based conversational systems. It allows developers to define rules that control LLM outputs, such as avoiding specific topics, following predefined dialog paths, adopting particular language styles, and extracting structured data. Key benefits include building trustworthy, safe, and secure applications, securely connecting models and services, and protecting against common LLM vulnerabilities. The library requires Python 3.10 to 3.13 and can be installed via pip.
Key Features
Programmable guardrails to control LLM output
Build trustworthy, safe, and secure LLM applications
Securely connect models, chains, and other services
Controllable dialog with predefined conversational paths
Protection against common LLM vulnerabilities
Open-source under Apache-2.0 license
Supports Python 3.10-3.13
Installation via pip (pip install nemoguardrails)
Pros & Cons
Pros
- Open-source and free to use
- Provides programmable safety and security controls for LLMs
- Enables secure integration with other services without compromising control
- Supports customizable conversational paths for consistent user experiences
- Developed and maintained by NVIDIA with active community support
Cons
- Requires Python 3.10 or later (may limit compatibility with older environments)
- Learning curve for defining guardrails and understanding the Colang language
- Documentation and examples rely on community contributions; official docs at docs.nvidia.com/nemo/guardrails
Best For
Preventing LLMs from discussing unwanted topics (e.g., politics)Enforcing specific response styles, language, or formattingDesigning conversational flows with standard operating procedures (e.g., authentication, support)Extracting structured data from user conversationsSecurely integrating LLMs with external tools and services (e.g., chains, APIs)
FAQ
What is NeMo Guardrails?
NeMo Guardrails is an open-source toolkit for adding programmable guardrails to LLM-based conversational systems, developed by NVIDIA.
How do I install NeMo Guardrails?
Install using pip: pip install nemoguardrails. Requires Python 3.10, 3.11, 3.12, or 3.13.
What are programmable guardrails?
Programmable guardrails are rules that control LLM output, such as avoiding certain topics, following predefined dialog paths, using a specific language style, or extracting structured data.