Alternatives to Arize Phoenix

Open-source LLM observability for tracing, evaluating, and optimizing AI agents end-to-end.

Free, open-source AI observability and evals for debugging agents

Open-source AI agent tracing and LLM-as-judge evaluation platform for debugging and improving agent quality.

OpenTelemetry-native open-source AI agent evaluation and tracing

Open-source AI evaluation and observability for LLMs, RAG, agents, and predictive ML.

OpenTelemetry-native observability with AI SRE Agent0 for automated production insight.

AI observability and evals that auto-fix agent code via git

Open-source OpenTelemetry observability for Python LLM apps

Open source platform to debug, evaluate, monitor, and optimize AI agents and ML models.

Open-source AI observability for privacy-preserving logging and LLM security

Open-source workspace to build, evaluate, and deploy AI agents through chat

Open-source framework to replace vibe checks with reproducible, LLM-driven evaluation loops for RAG and agents.

Open-source LLM observability and prompt management for AI engineering teams.

Open-source, OpenTelemetry-native LLM observability and AI engineering platform for teams.

AI agent observability and evaluation platform for LLM apps

AI observability and eval engineering platform that turns offline evals into production guardrails.

Enterprise AI control plane for observability, guardrails, and governance of agentic AI.

PostHog is an open-source product OS that unifies analytics, session replay, feature flags, and a data warehouse in one platform.

AI observability and eval engineering platform that turns offline evals into production guardrails.

Open-source LLM observability and evaluation for agentic AI, with real-time tracing, cost optimization, and auto-fix.

Trace, debug, and deploy reliable AI agents with full observability

Active observability for AI agents: trace, evaluate, and discover patterns at scale.

Open-source LLM & VLM evaluation platform for standardized benchmarking

AI agent observability that detects and auto-fixes silent failures in production.

Free open-source desktop widget tracking tokens, cost, and limits across 29+ AI coding tools.

Free open-source AI usage tracking & analytics for developers

Free local observability for AI coding agents — tokens, cost & traces on your machine.

Open-source Python library to track the real-time carbon footprint of your GenAI API calls.

Pre-built AI models for finance, from fraud detection to agentic workflow orchestration.

Enterprise LLM evaluation, observability, and red teaming in one platform.