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Code & Dev Tools · verified 2026-07-14

Helicone

One-line logging for LLM calls.

A proxy that captures every request with cost, latency and caching, plus rate limiting per user. Open source and self-hostable.

Rating: 4.3 / 5
Pricing: Open source
Best for: Observability, Cost control, Developers
Platforms: Web, API, Linux
Runs locally: Yes
Content policy: Standard filters

Matching filters

Writing code Research Spreadsheets & data Evals & observability Model hosting & inference Has a public API Open source Free or open source Free when self-hosted Web Linux Desktop app API Runs locally

What stands out

Change one base URL to enable
Response caching
Per-user rate limits

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