# Neptune Labs

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/neptune-labs

- Industry: Software
- Headquarters: Palo Alto, US
- Website: www.neptune.ai
- Total disclosed funding: $8M
- Latest round: Series A (Apr 10, 2022)
- Investors on record: 4

## About

Neptune Labs, Inc. operates a sophisticated experiment tracking platform that empowers AI researchers to efficiently monitor and debug large-scale training processes, enhancing performance and stability in machine learning. Founded in 2017 in Warsaw, Poland, Neptune Labs, Inc. specializes in providing experiment tracking solutions for AI research. The company was co-founded by Paulina Janušauskas, Piotr Lusakowski, and Piotr Niedzwiedz, who serves as the CEO. In December 2025, OpenAI agreed to acquire Neptune Labs, Inc. from b2venture, Rheingau Founders, TDJ Pitango, and Almaz Capital Partners in an all-stock transaction worth approximately USD 400 million. Financial terms were not disclosed. Neptune.ai offers a specialized experiment tracking platform designed for foundation models, enabling AI researchers to monitor and debug large-scale training processes. The platform allows users to log thousands of metrics per training run, providing a comprehensive view of model performance and addressing issues such as vanishing gradients. Neptune's deployment options include self-hosted solutions for on-premises or private cloud environments, catering to a diverse client base across North America, Europe, and Asia, including leading AI research institutions and corporations focused on artificial intelligence development. In the most recent year of 2023, Neptune.ai recorded a revenue of USD 132,351 with an EBITDA of USD 40,152. The company generates revenue primarily through subscription-based models that offer various pricing plans tailored to the needs of its clients, including self-hosted services for enhanced data control.

## Funding rounds

- Series A, Apr 10, 2022, $8M — Almaz Capital, b2venture, Rheingau Founders, TDJ Pitango

## Investors

- Almaz Capital (https://capitalatlas.ai/funds/almaz-capital) — Series A
- b2venture (https://capitalatlas.ai/funds/b2venture) — Series A
- Rheingau Founders (https://capitalatlas.ai/funds/rheingau-founders) — Series A
- TDJ Pitango — Series A