Respan
Unified LLM API with 200+ models
The top alternatives to Helicone in the LLM Gateways space, compared on features, pricing, and what they're best at.
Updated March 10, 2026
Helicone is an open-source LLM observability platform providing monitoring, logging, and analytics for AI applications. The platform offers detailed insights into LLM requests, costs, latency, and user behavior with minimal integration overhead—just one line of code to get started. Helicone supports all major LLM providers and provides features like caching, rate limiting, prompt management, and user tracking. The platform is available as both open-source for self-hosting and as a managed cloud service with generous free tiers. Helicone helps teams understand and optimize their AI applications through comprehensive observability.
Respan
Unified LLM API with 200+ models
OpenRouter
300+ models across 60+ providers via one OpenAI-compatible API
Cloudflare AI Gateway
Edge-deployed AI gateway
Vercel AI Gateway
Portkey
AI gateway with 200+ models
Bifrost
High throughput
LiteLLM
Open-source LLM proxy
Stainless
SDK generation
Unify
Martian
Intelligent model routing based on prompt type
Kong AI Gateway
AI traffic management
Requesty
400+ model access
Apigee AI Gateway
Google Cloud AI traffic management
The Token Company
Token compression
One platform for routing, observability, tracing, and evals across every LLM provider.