Neptune joins OpenAI

Summary

Neptune has entered a definitive agreement to be acquired by OpenAI, subject to closing conditions. Neptune will join OpenAI and continue to support AI researchers with tools to monitor, debug, and evaluate frontier models. Neptune’s standalone services will sunset by March 5, 2026, with a clear customer transition program.

Legal note: The closing is subject to customary closing conditions; financial terms are undisclosed.

Fact sheets

• What Neptune does:
  Neptune provides a training observability platform for foundation models to help AI researchers build better models faster.
• Founded / HQ / Team:
  • Founded: 2017 
  • HQ: Palo Alto, California, USA 
  • Team: 60.
• Typical use cases:
  Monitoring, debugging, and evaluation of foundation model training at scale.
• Sunset & continuity:
  Neptune’s standalone services will sunset by March 5, 2026. No immediate change to customer access today, no new features (stability & security fixes only), export tools and step‑by‑step guides available now.
• Support & where to act:
  All transition details—timeline, export, FAQ —are centralized at the Neptune Transition Hub.
• Links:
  • Announcement blog (Neptune): We are joining OpenAI
  • Neptune Sunset Center: Transition Hub
  • Press assets: Announcement Press Kit

• What OpenAI does:
  OpenA is a leading AI research organization with a mission to build safe and beneficial AGI.
• Why Neptune is joining:
  Neptune’s infrastructure and expertise in experiment tracking and training observability at scale will strengthen OpenAI’s internal experimentation and training stack, helping researchers iterate faster with trustworthy signals.
• Links:
  • Announcement blog (OpenAI): OpenAI to acquire Neptune

• What’s happening:
  Neptune has entered a definitive agreement to be acquired by OpenAI, subject to closing conditions, to support an internal AI research platform on which AI researchers are building frontier models.
• Financial terms:
  Undisclosed.
• Customer impact:
  No immediate change to access today. Neptune’s standalone services will sunset by March 5, 2026, with a clear, supported transition for both SaaS and self-hosted customers (export tools, stability/security fixes to EoS, support).
• Where to learn more / get help:
  • Neptune Sunset Center: Transition Hub
  • Press contact: contact@neptune.ai

Founder bio — Piotr Niedźwiedź

Piotr Niedźwiedź is the founder and CEO/CTO of Neptune, a platform used by leading AI labs for scalable training observability. He began programming at age seven, later becoming a top-30 Google Code Jam finalist and gaining engineering experience at Google and Facebook. Before Neptune, he founded and served as CTO of two successful software houses, one focused on deep learning, where his team’s early tooling work turned into what eventually became Neptune.

Headshot: Announcement Press Kit
LinkedIn: Piotr Niedźwiedź

Pre‑approved quotes

This is an exciting step for us. We’ve always believed that good tools help researchers do their best work. Joining OpenAI gives us the chance to bring that belief to a new scale.

Piotr Niedźwiedź CEO/CTO & co-founder of neptune.ai

Neptune has built a fast, precise system that allows researchers to analyze complex training workflows.
We plan to iterate with them to integrate their tools deep into our training stack to expand our visibility into how models learn.

Jakub Pachocki Chief Scientist, OpenAI

Assets to use/download

• Logos (Neptune & OpenAI reference): SVG + PNG, variants
• Headshots of Piotr Niedźwiedź
• Neptune + OpenAI visuals for the announcement
• License: Editorial use only for coverage of this news; do not alter logos; trademarks remain with their owners.

Links & contacts

• Neptune announcement blog: We are joining OpenAI
• OpenAI short blog: OpenAI to acquire Neptune
• Neptune Sunset Center (timeline, export, FAQ): Transition Hub
• Press assets folder: Announcement Press Kit
• Press contact: contact@neptune.ai
• Support (transition questions): support@neptune.ai (Mon–Fri, 9-17 CET)