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helicone
TypeScript

helicone

🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓

by Helicone · GitHub
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Likely
Self-hostable
agent-monitoringanalyticsevaluationApache-2.0TypeScriptSelf-hostable
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In plain words

Monitor and analyze AI model performance with just one line of code, making it easy to track requests and data.

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6.1k5.9k
2026-07-042026-08-31
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📄 About

🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓

helicone has 6.1k stars on GitHub. It has been forked 661 times. helicone is written mainly in TypeScript. It has been in active development since 2023. helicone is available under the Apache-2.0 license. Its main topics are agent-monitoring, analytics, evaluation, gpt.

Frequently asked questions

What is helicone?

🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓

Is helicone open source?

helicone is an open-source project. It is released under the Apache-2.0 license.

Is helicone free?

Yes. helicone is free and open source — you can use, modify and self-host it.

What license does helicone use?

helicone is available under the Apache-2.0 license.

What language is helicone written in?

helicone is written mainly in TypeScript.

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