Helicone

Helicone

Verified

AI observability platform for monitoring and debugging LLM applications.

About Helicone

"Full visibility into your LLM costs and behavior"

Helicone is an open-source LLM observability platform that provides logging, monitoring, caching, and cost analytics for AI applications with a single line of code change. It captures every LLM request with full prompt and response details, latency, token counts, and costs — providing the visibility needed to debug AI applications, optimize prompt performance, and control API spending. AI engineers building production LLM applications use Helicone to maintain operational awareness of their AI systems, identify performance bottlenecks, and make data-driven decisions about model selection and prompt optimization.

Key Features

  • LLM observability and logging
  • Cost tracking across providers
  • Prompt caching analytics
  • Request routing
  • Evaluation tools
  • Open-source platform

Best For

Monitoring LLM API costsDebugging AI application issuesComparing model performanceOptimizing LLM infrastructure

Official Links

Tool Details

Pricing
Freemium
Free plan available
Verified Tool
Reviewed by our team
Last verified
Feb 18, 2026
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