Top AI Tools for AI Observability & Evals

Discover the best AI tools for AI Observability & Evals. Find the right solution to enhance your workflow.

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Top AI Observability & Evals Tools

Highest-rated tools in this category, curated weekly

AI Infrastructure

Opik

Opik is Comet's open-source (Apache 2.0) LLM observability and evaluation platform: tracing, 30+ judge metrics, real-time guardrails, and a distinctive automated agent optimizer. Free to self-host with a $19/month cloud tier, it undercuts the premium eval platforms.

Freemium

AI Infrastructure

Braintrust

Braintrust is an eval-first observability platform for teams shipping LLM products, wiring tracing, datasets, scorers, and CI/CD quality gates into one workflow. Used by OpenAI, Stripe, and Notion, it is premium and proprietary, with a steep jump from free to paid.

Freemium

AI Infrastructure

Arize Phoenix

Arize Phoenix is an open-source, OpenTelemetry-native observability and evaluation platform for LLM apps and agents. It traces every call, scores it with 50+ built-in evaluators, and self-hosts for free, which makes it the standard pick for vendor-neutral teams.

Freemium

AI Infrastructure

Vast.ai

Vast.ai is a peer-to-peer GPU rental marketplace where independent hosts list compute at market rates. H100s from ~$0.90/hr, RTX 4090s from $0.34/hr. Far cheaper than managed clouds, with tradeoffs on reliability and setup complexity.

Paid

All AI Observability & Evals Tools (4)

AI Infrastructure

AI Infrastructure

AI Infrastructure

AI Infrastructure

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