# Helicone

> Open-source LLM gateway and observability platform for routing, debugging and analyzing AI app requests

Source: https://dontaskagain.com/helicone
Website: https://www.helicone.ai/?utm_source=dontaskagain
Pricing: Freemium
Categories: [Observability](https://dontaskagain.com/categories/observability.md), [Open source](https://dontaskagain.com/categories/open-source.md)
Listed: 2026-10-18
Updated: 2026-10-18

Helicone is an LLMOps platform and AI gateway that sits between an app and its model providers. It routes requests across providers such as OpenAI, Anthropic and Azure and logs each one, so developers can see what their LLM calls and agents do in production.

**Key features:**

- Route requests across model providers with automatic fallbacks.
- Cache responses and apply rate limits at the gateway.
- Inspect requests, sessions and user analytics.
- Query logs with HQL and set up alerts and reports.
- Manage prompts, scores and datasets and test them in a playground.

The scraped homepage is short, so these details come from the brand data and pricing page. Helicone is open source under Apache 2.0, with on-prem deployment on Enterprise. The free Hobby plan includes 10,000 requests a month; Pro is $79/month and Team $799/month with SOC 2 and HIPAA, both plus usage and with a 7-day free trial.

## More observability agents

- [LangSmith](https://dontaskagain.com/langsmith.md): LangChain's platform for tracing, monitoring, evaluating and debugging LLM apps and agents in production
- [Langfuse](https://dontaskagain.com/langfuse.md): Open-source platform for tracing, evaluating and improving LLM apps and agents, with prompt management
- [Arize](https://dontaskagain.com/arize.md): Observability and evaluation platform that traces agents, runs evals at scale and helps debug and fix them
- [AgentOps](https://dontaskagain.com/agentops.md): Observability SDK for tracing, replaying and debugging AI agent runs across 400+ LLMs and frameworks
- [Braintrust](https://dontaskagain.com/braintrust.md): Platform for tracing agents in production, running evals and turning real traffic into regression tests
- [Galileo](https://dontaskagain.com/galileo.md): Evaluation and observability platform that turns tuned evals into low-cost runtime guardrails for agents