# Helicone

> Helicone is an Apache-2.0 LLM observability platform known for one-line integration by changing the API base URL; its backend runs on Cloudflare Workers with ClickHouse and Kafka and the vendor reported over 2 billion handled calls, but multiple sources report it entered maintenance mode after an acquisition by Mintlify in March 2026.

Apache-2.0 LLM observability proxy, now reported to be in maintenance mode.

- **Category:** Observability
- **License:** Apache-2.0
- **Language:** TypeScript
- **Self-hosted:** Yes
- **GitHub stars:** 6199 (2026-10-04)
- **Repository:** https://github.com/Helicone/helicone
- **Last verified:** 2026-10-04

> Caveat: Reported to be in maintenance mode following a March 2026 acquisition; verify current activity before adopting for new production use.

Source: https://agent.c8.fit/tools/helicone/