Arthur AI

Arthur AI is an AI control plane that enables organizations to discover, govern, evaluate, and improve AI systems across the enterprise. It provides automated agent discovery across multiple sources including OTEL, MCP, network traffic, and cloud APIs, with risk scoring and policy enforcement. Arthur offers automated AI performance evaluations with pass/fail judgments on every AI interaction, agentic observability and tracing that captures full reasoning chains including LLM calls, tool use, and retrievals, and synchronous policies and guardrails enforced both pre- and post-LLM execution. It also includes an Agent Development Toolkit with versioned prompts, A/B experiments, and structured testing, and is model-, framework-, and cloud-agnostic. Arthur serves enterprise customers including Axios, the Philadelphia Inquirer, Upsolve AI, and Expel, and maintains an open GitHub presence alongside regular blog and webinar content. Pricing is freemium, with a free tier available to get started and paid tiers, plus enterprise SaaS, hybrid, and on-premises deployment options with professional services, detailed on its dedicated pricing page.