# Comet

> Comet is an AI developer platform that helps machine learning and AI teams track, evaluate, monitor, and manage models across their full lifecycle - from training experiments to production LLM and agentic applications. Founded in 2017 by Gideon Mendels and Nimrod Lahav, the New York-based company built its reputation on experiment tracking ('GitHub for machine learning') and now extends that into the generative-AI era with Opik, its open-source LLM observability and evaluation platform.

- **Founded:** 2017
- **Headquarters:** New York, New York, United States
- **Founders:** Gideon Mendels (Co-Founder & CEO), Nimrod Lahav (Co-Founder & CTO)
- **Team size:** ~80-88 employees across 14 countries
- **Products:** Comet Experiment Management, Model Registry & Production Monitoring, Opik, Opik Agent Optimizer, Opik Guardrails
- **Notable:** Coined the 'GitHub for machine learning' positioning for experiment tracking., Raised $50M Series B in November 2021, just six months after its Series A., Launched Opik in 2024 as an open-source LLM evaluation and observability platform.

## Products & services

- **Comet Experiment Management** — Track, compare, explain, and reproduce machine learning experiments with automatic logging of metrics, hyperparameters, code, and artifacts.
- **Model Registry & Production Monitoring** — Version, stage, and govern models, then monitor them in production to detect drift and performance degradation.
- **Opik** — Open-source, end-to-end LLM development platform for tracing, evaluating, testing, and monitoring LLM applications, RAG systems, and agentic workflows.
- **Opik Agent Optimizer** — Automated prompt and agent tuning using multiple optimization algorithms to improve accuracy and consistency across agentic systems.
- **Opik Guardrails** — Real-time validation of LLM outputs to catch hallucinations, unsafe content, and unintended behaviors.

## Achievements

- Coined the 'GitHub for machine learning' positioning for experiment tracking.
- Raised $50M Series B in November 2021, just six months after its Series A.
- Launched Opik in 2024 as an open-source LLM evaluation and observability platform.
- Grew Opik adoption to over 150,000 developers.
- Published the 2023 MLOps Industry Report based on a machine learning practitioner survey.

## Latest updates

- **2024-09** — Launched Opik, an open-source end-to-end LLM evaluation, tracing, and monitoring platform.
- **2025-06** — Released Opik Agent Optimizer (public beta) and Guardrails, plus new integrations with LangChainJS, Autogen, and Agno.

## Links

- Website: https://www.comet.com
- LinkedIn: https://www.linkedin.com/company/comet-ml
- Twitter/X: https://twitter.com/Cometml
- GitHub: https://github.com/comet-ml
- YouTube: https://www.youtube.com/channel/UCO0_Dk0Ny3srhFcYbcEUstA
- Facebook: https://facebook.com/cometdotml

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Profile page: https://yespress.io/comet
Published by YesPress — https://yespress.io
Last updated: 2026-06-07