Alternatives to Helicone

Braintrust delivers agent observability with evals, pattern discovery, and trace-scale storage in one platform.

LangSmith agent observability: trace, monitor, and evaluate every LLM run with SmithDB-backed trace search.

LiteLLM is a self-hosted AI gateway that puts 140+ providers and 1,800+ models behind one OpenAI-compatible API.

Maxim AI pairs AI agent evaluation, simulation and observability with Bifrost, an open-source LLM gateway.

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

QuickCompare replays your production LLM traffic on candidate models so you see which behaviours change before you switch.

TruEra's ML monitoring and AI quality platform now redirects to Snowflake, folding model diagnostics and LLM observability into the data

Open-source LLM observability and agent evals: trace, evaluate, and improve AI agents on one MIT-licensed platform

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

Comet's Opik turns LLM observability and evaluation into agent code fixes, not just trace dashboards

LLM evaluation and observability that turns production traces into repeatable evals and CI regression tests

Open source LLM observability with OpenTelemetry tracing, evals, and prompt management for agents

Multi-model AI verification: three frontier models answer blind, cross-examine each other, and return the one answer that survived with a

NannyML estimates your ML model's live performance without ground-truth labels and alerts you only when it actually matters

Fiddler AI is an AI agent observability and control plane with inline guardrails, continuous evaluation, and auditable governance.

Agent observability with Signals: Laminar surfaces agent failures you never had to define.

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

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

Goodfire's Silico reverse-engineers the causal mechanisms inside LLMs, genomic models, and vision policies.

OpenJudge is an Apache 2.0 open-source AI evaluation framework shipping 50+ benchmark-validated graders for agents, LLMs, code, math, and multimodal models.

Edgee Team gives engineering leaders per-repo, per-PR token observability and spending caps for coding agents.

Local token usage and cost tracking for 21 AI coding agents — reads the logs they already write.

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

OpenCompass benchmarks LLMs, VLMs, and AI4S models on dated leaderboards and a head-to-head Arena

Token Monitor tracks AI coding token usage, cost, and quota limits across 44+ tools in one free desktop widget.

MathArena is a free competition-math LLM leaderboard with Lean-verified proofs and clickable raw model outputs.

A FastAPI, React 19 and Postgres full-stack template that fails the build on mocks and untested routes.

Interactive timeline visualization for Harmony and Codex CLI agent logs

Observability and optimization for OpenClaw agents — trace failures, attribute cost, and ask Tracy what to fix.

Claw Lens is a zero-config local observability dashboard for OpenClaw AI agents — live monitor, cost analytics, and security audit in one