#3
Arthur
Best for: Teams needing LLM safety monitoring with a free starter tier
Arthur provides LLM performance and safety monitoring with its Shield product offering a free tier — a differentiator from Fiddler AI's enterprise-first positioning. Arthur covers classic ML monitoring alongside LLM safety. Public documentation of specific LLM observability features is limited; evaluation requires direct engagement.
Where it wins
- Shield free tier for LLM safety monitoring.
- Combined classic ML and LLM monitoring from one platform.
- Established vendor with pre-LLM ML monitoring heritage.
Where it loses
- Limited public documentation of LLM observability capabilities.
- Enterprise monitoring contact-only with no public pricing.