Helicone
Open-source LLM observability platform and AI gateway for developers.
Updated April 2026
Overview
- Website
- helicone.ai
- Segment
- LLM Observability & Tracing
Product overview
Helicone builds an open-source platform providing observability, analytics, prompt management, and an AI gateway with caching, rate limiting, and model routing for LLM applications across providers like OpenAI and Anthropic. Used by thousands of developers and AI companies for monitoring costs, latency, and performance in production AI apps including agents and chatbots. Acquired by Mintlify in March 2026; distinct for one-line integration, self-hosting support, and generous free tier of 10k requests/month , .
Revenue model
Open-source (self-host free); hosted tiers: Hobby (free, 10k requests/mo), Pro ($79/mo + usage-based for requests/storage), Team ($799/mo + usage-based), Enterprise (custom); 0% markup on underlying LLM costs , .
Moat
Helicone's key competitive moat is its proprietary dataset from three years of observing AI systems in production across 16,000 organizations, providing unique insights into LLM usage patterns, agentic shifts, and optimization that enable superior routing, observability, and infrastructure for high-growth AI startups. High switching costs arise from deep integration as an open-source proxy/AI gateway with self-hosting flexibility, low-latency Rust-based performance (~8ms P50), and scale-handling infrastructure for billions of logs, making replication difficult despite open-source nature.