Apps that use AI models send them thousands of requests, and every request costs money. Helicone sits between your app and the AI providers: it counts each request, shows what it costs and how fast it runs, and can automatically switch to a backup provider when one fails. Think of it as an electricity meter plus a switchboard for your AI usage. Helicone is an open-source AI gateway and observability platform for LLM applications. As a gateway, it fronts 100+ models behind a single API key with intelligent routing and automatic fallbacks across OpenAI, Anthropic, Gemini, Azure and others. As an observability layer, it logs every request with cost, latency and token metrics, aggregated per user, session or custom property, with an HQL query interface for deeper analysis. Around that core it adds prompt versioning, a playground for testing configurations, dataset creation from production traffic, rate limiting and alerting. Integration is typically one line — pointing your base URL at the proxy — or via async logging SDKs when you don't want a proxy in the request path. The stack (dashboard, proxy worker, Jawn processing server, Supabase, ClickHouse) is Apache 2.0 and self-hostable via Docker or Helm, and the hosted version is SOC 2 Type II and GDPR compliant with a free tier of 10,000 requests per month. Helicone is a Y Combinator W23 company, launched in 2023.
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Développeurs | — | |
| 2 | Développeurs | — | |
| 3 | Développeurs | — | |
| 4 | Développeurs | — |
