Arthur AI
LLM firewall and model monitoring platform for production AI.
About
Arthur AI is a New York-based AI observability company founded in 2018 that pivoted from classical ML monitoring to generative AI safety. Its flagship product, Arthur Shield, is an enterprise LLM firewall that detects and blocks prompt injections, jailbreaks, hallucinations, toxicity, and sensitive data leakage in real time between users and LLM applications.
The platform offers API-based integration and on-premise deployment for organizations with strict data residency requirements, built on the company's deep expertise in model monitoring. Arthur AI has raised over $65M in total funding. The enterprise sales motion means custom pricing and no self-serve tier comparable to open-source alternatives like LLM Guard.
What it can do
- Real-time LLM firewall
- Prompt injection detection
- Hallucination and toxicity blocking
- PII leakage prevention
- On-premise deployment option
Setup
Contact Arthur AI for an enterprise engagement and integrate via API.
Prerequisites
Production LLM application; enterprise budget for custom pricing.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 84; Trending score 76/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.