Helicone (YC W23) – OSS LLM Observability and Development Platform
Hey HN, we're Justin and Cole, the founders of Helicone (https://helicone.ai). Helicone is an open-source platform that helps teams build better LLM applications through a complete development lifecycle of logging, evaluation, experimentation, and release. You can try our free demo by signing up (https://helicone.ai/signup) or self-deploy with our new fully open-source helm chart (https://helicone.ai/selfhost). When we first launched 22 months ago, we focused on providing visibility into LLM applications. With just a single line of code, teams could…
Helicone (YC W23) – OSS LLM Observability and Development Platform launched on January 23, 2025 with 29 votes, #584 of 6,141 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Helicone is an open-source platform for developing and monitoring large language model applications. It provides logging, evaluation, experimentation, and release management tools accessible through a single line of code integration. Teams can self-host using Helicone's open-source Helm chart or use the hosted demo version, with the platform having processed over 2.1 billion requests for users ranging from startups to enterprise companies.
written from the facts on this page · September 2026
From the sources
🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓 - Helicone/helicone
In the maker’s words, at launch
Hey HN, we're Justin and Cole, the founders of Helicone (https://helicone.ai). Helicone is an open-source platform that helps teams build better LLM applications through a complete development lifecycle of logging, evaluation, experimentation, and release. You can try our free demo by signing up…
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