NeMo Guardrails
AI Security & Safety · Free + paid
NVIDIA's toolkit for adding safety guardrails to LLMs
At a glance
- Made by
- NVIDIA
- Korean
- None (English and a few others only)
- Open source
- Apache-2.0
- GitHub
- 7,289 stars · NOASSERTION
What is NeMo Guardrails?
NeMo Guardrails is an open-source toolkit for easily adding programmable guardrails (rails) to LLM-based conversational applications. Guardrails are ways to control LLM output, such as not discussing politics, responding to specific requests in a set way, following predefined conversation paths, using a particular language style, and extracting structured data. By placing guardrails between application code and the LLM, you can build reliable and safe apps and connect the LLM securely to other services (tools). The documentation covers the Colang language reference and security and evaluation topics. Install it with pip.
- Programmable guardrails (rails)
- Blocking conversations on unwanted topics
- Steering toward predefined conversation paths (controllable dialogue)
- Safe connection of LLMs to other services and tools
- Structured data extraction
- Colang language
Who uses NeMo Guardrails and for what
- For developers of LLM-based apps to protect and control conversations
- Enforcing standard operating procedures such as authentication and customer support in conversations
Pricing
Open source + paid enterprise plans
Some open-source tools are free; enterprise security platforms are billed under separate contracts
Estimate based on AI knowledge - please verify on the official site
AI tools similar to NeMo Guardrails (alternatives)
NeMo Guardrails vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| NeMo Guardrails | Free + paid | 0 | 6 | — | — | No |
| LlamaGuard | Free | 0 | 6 | — | — | No |
| Shieldstral | Free | 0 | 5 | Yes | — | No |
1 of these 3 tools have a free plan.
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
NeMo Guardrails on AI Galaxy Map
- One of 21 AI tools in the AI Security & Safety field.
- Connected to 6 other tools — #1 in its field.
Frequently asked questions
Can I use NeMo Guardrails for free?
Open source + paid enterprise plans. Prices can change, so check the official site before paying.
What AI can I use instead of NeMo Guardrails?
Tools that do the same job, such as LlamaGuard, Shieldstral, Guardrails AI, Lakera Guard, are connected to it on the map.
Can I use NeMo Guardrails in Korean?
None (English and a few others only)
Sources (official pages)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.