Alternatives to hud

LangSmith is agent and LLM observability from the LangChain team: trace, monitor, evaluate, and deploy AI agents.

Sharbo builds a skill network for AI agents — encode expert workflows once and let every agent activate them autonomously.

Patronus AI builds RL environments and training data so frontier agents learn judgment on the job

PandaProbe is open-source agent observability that traces runs, evaluates outcomes, and turns failures into validated fixes via its Repair

Kashikoi is a cloud simulation engine that benchmarks your AI agent from a single prompt — no code, no manual grading.

Agent evaluation platform that simulates voice and chat agents, traces production, and scores hallucinations before your customers hit them

Comet's Opik brings LLM observability and evaluation that turns agent traces into code fixes

Respan routes every agent run through one LLM gateway, then traces and evaluates it with production evals.

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

Retrace records every AI agent run, forks the failing step, and replays it to prove your fix before you ship.

Synth is a research workbench and hosted compute for optimizing coding agents with reproducible, evidence-backed evals.

Goodfire's Silico is an AI interpretability agent for reverse-engineering, debugging, and steering model internals.

Open-source Python framework that traces every AI agent span and scores runs with benchmarked, explainable LLM judges.

Lemma audits every AI agent trace against your agent's own instructions to catch silent failures in production.

Free Hugging Face agent leaderboard ranking LLMs on planning, tool use, and multi-step agentic tasks

Weights & Biases tracks ML experiments, versions models and datasets, and traces LLM apps — now inside CoreWeave Forge

Arena AI ranks chat models and coding agents on live head-to-head human votes and real agent sessions.

Open-source benchmark that scores AI agents on real, multi-step software-company work tasks.

AppWorld benchmarks interactive coding agents on 750 multi-app tasks across 457 APIs.

VisualWebArena is a 910-task benchmark from Carnegie Mellon that scores multimodal browser agents on whether they actually complete visual web tasks.

CodeClash benchmarks goal-oriented software engineering by making AI models build and evolve codebases to win 15-round arena tournaments.

FFMPerative Outrider turns AI research into review-ready draft pull requests matched to your codebase, then measures whether they helped.

BALROG is an open ICLR-published benchmark that scores agentic LLM and VLM reasoning across seven procedurally generated games.

Open-source LLM observability: trace agents, manage prompts, and run evals on one MIT-licensed platform.

Open-source LLM observability and agent evaluation you can trace, self-host, and eval end to end.

Braintrust traces agent runs, scores them with evals, and surfaces production failure patterns before they ship.

Put a hard question to three frontier models — they answer blind, cross-examine each other, and hand back the one answer that survived, with a verdict.

LangWatch Scenario simulates text and voice users against your AI agent, scoring every turn before production does.

Open-source AI agent improvement: trace production runs, detect failures, investigate signals, verify fixes with evals.

Trace, replay and debug AI agent runs — LLM calls, tool use and multi-agent interactions in one timeline, via a single SDK