Alternatives to WhyLabs

Open-source LLM observability and agent evaluation you can trace, evaluate, and self-host for free.

Arize Phoenix is open-source LLM observability: trace agent steps, run evals, and self-host your traces.

LangSmith is agent and LLM observability: trace, monitor, and evaluate AI agents in cloud, BYOC, or self-hosted.

Dash0 is OpenTelemetry-native observability where Agent0 investigates incidents, finds root cause, and opens fix PRs.

Open-source LLM observability and agent evals: trace, evaluate, and improve production AI agents with MIT-licensed tooling.

Open-source AI observability for agent tracing, LLM-as-a-judge evals, and coding-agent cost tracking.

Developer observability platform that traces, replays, and debugs AI agent runs across OpenAI, CrewAI, Autogen and 400+ LLMs

Open-source agent observability that auto-captures every LLM and tool call and flags failures you never wrote a detector for.

Metoro is a Kubernetes observability and AI SRE agent that watches your cluster with eBPF and opens fix PRs for production issues.

Free open-source AI usage tracking and analytics that syncs your token and cost data from Claude, Cursor, ChatGPT and other tools onto a shareable dashboard.

OpenLIT is an open-source, OpenTelemetry-native agent harness engineering platform for LLM tracing, evals, and guardrails you self-host.

Open-source OpenTelemetry tracing, versioning, and sessions for Python LLM apps—bring your own backend.

LLM evaluation, observability, and red teaming in one workspace — ship AI you can actually trust

TruLens traces AI agent runs with OpenTelemetry-native evals, showing where an agent fails and where you can cut cost.

Open source AI engineering platform for agent and LLM tracing, evaluation, prompt management, and ML lifecycle work.

ToolSpend tracks AI API spend across OpenAI, Anthropic, Google AI, Bedrock and Azure in one live cost dashboard.

Fiddler AI is an enterprise AI control plane for agent observability, inline guardrails, and auditable AI governance.

Open-source AI coworker workspace that builds, schedules and ships agents to Slack or Telegram

Maxim AI evaluates, simulates and observes AI agents — with Bifrost, its open-source LLM gateway, handling routing, budgets and guardrails.

Open-source Python framework that replaces vibe checks with reproducible evaluation loops for RAG pipelines and AI agents.

Evidently AI is an open-source Python framework for LLM evaluation, RAG testing, and ML model monitoring under Apache 2.0.

Galileo is an AI observability and eval engineering platform that turns offline evals into production guardrails for agents and RAG.

Palantir Gotham is the AI-powered kill chain and decision platform for defense, intelligence, and combat operations.

Braintrust is an agent observability platform that traces AI runs, scores quality with evals, and surfaces production failure patterns.

Helicone is an AI gateway and LLM observability platform for routing, debugging, and cost-tracking AI app traffic.

OpenCompass (司南) benchmarks LLMs, VLMs, and AI4S models on 100+ open evaluation datasets with dated leaderboards

Token Monitor is a free desktop widget that tracks AI coding token usage, cost, and quota limits across 44+ tools and providers.

Free daily LLM speed benchmarks — compare time-to-first-token and tokens-per-second across models and regions.

Free public leaderboard benchmarking LLMs on competition math and Lean proof benchmarks like ArXivMath and ArXivLean.

Local, MIT-licensed token and cost observability for AI coding agents — reads the logs your agents already write.