Open source alternative to Arize AI, LangSmith and Confident AI
Last verified
Helicone is an open source LLM observability platform that proxies your OpenAI and Anthropic calls to log requests, track costs, detect anomalies, and run prompt experiments in production. Apache 2.0.
Use Helicone when product and engineering need to connect LLM cost, latency, and quality to users, features, and prompts.
Your app only makes occasional internal model calls and raw logs already answer your debugging questions.
Use Helicone when prompt changes, model switches, or user behavior create production issues that need request-level traces.
You need full-stack APM first and LLM tracing is only a minor part of your observability needs.
LLM apps fail in ways normal web analytics do not explain. Teams need to know which prompts cost the most, which users trigger slow requests, where outputs degrade, and how model changes affect production behavior.
Without request-level observability, debugging becomes guesswork. Engineers inspect logs manually, product teams lack usage visibility, and finance teams cannot connect model spend to features or customers.
Helicone captures model requests and responses so teams can inspect prompts, latency, status, usage, and production behavior from one observability surface.
Track token usage and spend across models, users, and features, giving teams a clearer view of where AI costs come from.
Request metadata helps developers connect model behavior to application users, prompts, and workflows instead of searching raw logs.
Helicone monitors LLM requests, prompts, responses, latency, status, token usage, and cost so teams can debug AI application behavior.
Helicone can replace LangSmith for LLM request observability and usage analytics. LangSmith remains stronger for teams already committed to the LangChain ecosystem.
Helicone documents self-hosting options, which helps teams keep model telemetry under their own infrastructure policies.
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LangSmith
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Trace and debug LLM prompts while monitoring inference costs
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Run Helicone on your own server
Self-host Helicone on a Hostinger VPS.
Deploy on HostingerFeatured
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