Updated March 10, 2026
Helicone is an open-source LLM observability and proxy platform. By adding a single line of code, developers get request logging, cost tracking, caching, rate limiting, and analytics for their LLM applications. Helicone supports all major LLM providers and can function as both a gateway proxy and a logging-only integration.
Inworld Router is an LLM router with conditional routing, A/B testing, and built-in TTS across 220+ models, billed at provider rates with no markup.
Core capabilities each platform advertises.
InWorld AIWhat each tool does well, and the limitations to keep in mind.
Pros
Cons
InWorld AIPros
Cons
Choose Helicone if you wantChoose if you want
Choose InWorld AI if you wantChoose if you want
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
Try Respan free