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Helicone

Open-source LLM observability, logging, and cost tracking.

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4.6(420 reviews)

Visit Helicone

https://www.helicone.ai

About Helicone

Open-source LLM observability platform. Helicone logs all your LLM requests, tracks costs and latency, runs prompt experiments, and detects issues — with a single line of code added to your existing OpenAI or Anthropic calls.

Key Features

Request logging and replay
Cost and latency tracking
Prompt versioning
A/B testing for prompts
User session tracking

Helicone Pros & Cons

Pros

  • +One-line integration with OpenAI/Anthropic/Gemini
  • +Open-source with free generous tier
  • +Real-time cost tracking prevents surprise bills

⚠️ Cons

  • Smaller feature set than LangSmith for complex chains
  • Enterprise features require paid plan

Who Is Helicone Best For?

👤AI engineers building LLM-powered apps
👤Startups monitoring API costs
👤Teams debugging prompt regressions

Tags

LLM observabilityprompt monitoringcost trackingOpenAI loggingAI debugging
🏷️

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