NeMo Guardrails

by NVIDIA

Safety layer often paired with Whisper voice agents.

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TL;DR

Best for constraining LLM responses on top of Whisper ASR. Pricing: free.

Category
Open source
License
NOASSERTION
Stars
★ 6.9k
Last push
2026-08-07
Pricing
free
Platforms
Linux, macOS

What it is

NVIDIA's open guardrails toolkit. Apache-2.0.

Best for: Constraining LLM responses on top of Whisper ASR.
Watch out for: Not an ASR engine.

Install / use

pip install nemoguardrails

Features

Speaker diarizationNo
Word-level timestampsYes
Streaming / real-timeNo
Languages supported99
HIPAA eligibleNo

Links

GitHub repo ↗

NeMo Guardrails vs Whipscribe

FeatureNeMo GuardrailsWhipscribe
CategoryOpen sourceTranscription APIs
Pricingfree$4–$24 one-time packs (credits never expire) · $2 single unlock · 60 min free on signup
Speaker diarizationNoYes
Word timestampsYesYes
StreamingNoNo
Languages9999
PlatformsLinux, macOSWeb, API, MCP

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