Helicone

Overview

Helicone is an open-source LLM observability platform that provides a lightweight proxy layer between your application and LLM providers. It helps teams monitor, debug, and optimize their AI applications.

Features

• Lightweight Proxy: Minimal overhead between your app and LLM providers
• Cost Tracking: Detailed monitoring of LLM usage costs
• Request Logging: Comprehensive logging of all LLM requests and responses
• Performance Metrics: Track latency, token usage, and error rates
• Open Source: Fully open-source codebase under permissive license
• Easy Integration: Simple setup with minimal code changes
• Multi-Provider: Support for OpenAI, Anthropic, and other major LLM providers

Recent Developments

Helicone has moved into maintenance mode following its acquisition by Mintlify, but remains a solid choice for LLM observability.

Use Cases

• Debugging LLM application issues
• Cost monitoring and optimization
• Understanding user interaction patterns
• Performance optimization

Integration

Works with Langfuse for enhanced evaluation capabilities and integrates seamlessly with vector databases in RAG pipelines.