Tool profile
AI evaluation and reliability platform for testing, scoring, and monitoring model behavior with structured evaluators, research-driven metrics, and production-facing guardrail workflows.
AI evaluation
Patronus AI belongs in the catalog because evaluation has become a first-class part of serious AI product engineering, not a side exercise after the prompt is already in production. The official product story combines evaluators, simulation, research, and reliability infrastructure into a concrete product category. That makes it relevant for teams that care about whether their systems are actually safe, accurate, and stable rather than merely deployable.
It also deserves inclusion because the pricing page is strong enough to support real buyer judgment. Patronus publishes a free individual plan, a base plan at $25 per month, a custom enterprise tier, and specific API pricing for small evaluators, large evaluators, and explanation calls. That is exactly the kind of public commercial detail that improves a premium catalog and makes the entry more useful than a generic vendor summary.
Quick fit
Editorial take
Patronus AI should be framed as evaluation infrastructure, not as a vague trust-and-safety brand. The real questions are whether the evaluator quality is strong enough for the target domain and whether teams will operationalize the platform beyond one-off checks.
What it does well
Primary use cases
Fit notes
Compare with
Pressure-test this pick against nearby alternatives.
Agenta
Free planLLMOps
Open-source LLMOps platform for prompt management, evaluation, observability, and collaborative AI application development with a clear hosted pricing ladder.
Choose Agenta when the team wants collaborative prompt management, evals, and observability in one hosted workflow.
Pricing snapshot
Patronus AI offers Individual for free, Base at $25 per month, Enterprise custom pricing, $10 per 1K small evaluator API calls, $20 per 1K large evaluator API calls, and $10 per 1K evaluation explanations.
AgentOps
Free planAgent observability
Observability for AI agents with tracing, debugging, session visibility, and production monitoring.
Closer to agent observability than to model hosting or prompt tooling
