Helicone
Open-source AI gateway and LLM observability with proxy-based tracing.
Open source
Best when you want request-level cost, latency, and cache metrics by routing LLM traffic through one gateway.
Selection advice
Choose Helicone when swapping the model base URL is the fastest path to observability across many providers.
Best for
- low-friction production tracing
- LLM cost and latency dashboards
- gateway caching and failover
Not ideal for
- teams that need deep span-level agent debugging only
- architectures that cannot route model traffic through a proxy
Core concepts
proxyrequestscachingsessionsevals
Minimal implementation shape
Point your OpenAI client at the Helicone gateway, ship one agent endpoint, and review per-request cost and tool-call latency in the dashboard.