Overview
Metadata store and experiment tracking platform for ML teams (MLOps). Founded in Warsaw in 2017 by Piotr Niedzwiedz and colleagues from deepsense.ai, Neptune.ai provides logging, monitoring, and model registry capabilities for ML engineers and researchers. The platform served over 100 paying companies including Roche and InstaDeep. Acquired by OpenAI in December 2025.
Verified record
- Verified deployments
- None on file
- Active incidents
- None on file
Valuation of record
Company-claimedPriced roundSeries B post-money
Neptune.ai on the deployment map
View the global mapNeptune.ai has no verified deployments on the DEPLOY registry yet. Explore the deployment map by place and type.
No verified deployments for Neptune.ai on the DEPLOY record yet. Track Neptune.ai to know the moment the first one is verified.
Relationships
Current leadership (4)
- Piotr Niedzwiedz CEO and Foundersecondary-verified
- Jakub Czakon Co-foundersecondary-verified
- Paulina Prachnio Co-foundersecondary-verified
- Piotr Lusakowski Co-foundersecondary-verified
Founders (4)
- Piotr Niedzwiedzno longer at company
- Piotr Lusakowskino longer at company
- Paulina Prachniono longer at company
- Jakub Czakonno longer at company
Safety record
No incidents on record for Neptune.ai.
Only active incidents are counted. Retracted incidents are excluded from this summary but remain reachable at their canonical URLs.
Full safety record: incidents, sourcing, and exposure data →
Recent coverage
Neptune.ai in third-party press
Financial state
- Reporting basis
- private_reported
- Lifecycle stage
- acquired
- Counterparty risk class
- low
Each numeric field carries its own basis marker. Aggregators report a number; this surface preserves the source class so verification depth travels with the value.
Partnerships (1)
- OpenAI x Neptune.ai (acquisition) with OpenAIinvestmentannounced
Funding rounds (3)
Neptune.ai’s 3 disclosed rounds, $70M in total, oldest to newest.
- Series B2024-08-01
$60M(reported) · $300M post
Investors: Accel (lead), Scale Venture Partners (follow), SaaS Ventures (follow)
- Series A2022-04-18
$8M(reported)
Investors: Almaz Capital (lead), btov Partners (follow), Rheingau Founders (follow), TDJ Pitango Ventures (follow)
- Seed2018-09-18
$2M(reported)
Investors: Almaz Capital (lead)
Recent activity
Every change to this record is dated, sourced, and independently verified where marked.
- Record createdAug 9, 2026
Added to the verified registry
Common questions
What is Neptune.ai?
What does Neptune.ai make?
Who is the CEO of Neptune.ai?
Where is Neptune.ai headquartered?
Is Neptune.ai a top robotics company?
When was Neptune.ai founded?
Is Neptune.ai safe?
Methodology: Claimed (not independently verified) · no sources on file · last reviewed 2026-08-09
Verification posture
Claimed (not independently verified)
Low confidence
Review state
Stable
Last reviewed 2026-08-09
The framework is documented at /methodology. Corrections at /corrections. Reviewer: DEPLOY editorial team.
Methodology surface for Neptune.ai.In the press
Recent coverage mentioning Neptune.ai from third-party publications. Automatically surfaced; not part of the verified registry record.
OpenAI to acquire Neptune, an AI model training assistance startup
OpenAI entered a definitive agreement to acquire Neptune, a startup building monitoring and debugging tools for AI model training; terms undisclosed.
OpenAI to acquire Neptune
OpenAI announced the acquisition of Neptune, whose experiment tracking and training monitoring tools will be integrated into OpenAI training stack.
Neptune.ai raises 60M Series B at 300M valuation
Neptune.ai raised USD 60M in Series B funding at a USD 300M valuation, led by Accel with participation from Scale Venture Partners and SaaS Ventures.
Github for machine learning, Neptune.ai raises 8M Series A funding
Neptune.ai raised USD 8M in Series A funding led by Almaz Capital with participation from btov Partners, Rheingau Founders, and TDJ Pitango.
Neptune.ai Raises 8 Million in Series A
Warsaw-based Neptune.ai raised USD 8M Series A led by Almaz Capital, bringing total funding to ~USD 13M; customers include Roche, InstaDeep, and The New Yorker.
Machine-readable surfaces
- Markdown mirror: /companies/neptune-ai.md
- RSS feed: /companies/neptune-ai/feed.xml
- JSON-LD: embedded in this page’s head
- REST API: /v1/companies/228c2796-282e-4493-a6e3-131edee8d845
- Revision history: /companies/neptune-ai/history
- Data documentation: /data
- Query this programmatically: Deploy MCP
Video
Neptune.ai is a Machine Learning observability platform for ML experiment tracking and model registry for the enterprise teams. With this SaaS platform, any ent
Reality vs attention
Not enough verified signal yet to place Neptune.ai against peers. Reality and attention percentiles publish once the underlying record clears its data floor.
Analysis
Limited public visibility and press coverage relative to peers.
Signal flags
Dimension breakdown
Verified signal
Attention (reach, not merit)
DEPLOY Intelligence scores are computed from verified registry data: confirmed deployments, disclosed funding rounds, regulatory filings, active job listings, video viewership, and press coverage. Confidence ratings reflect data availability. Scores update nightly.
DEPLOY Indices — verified vs claimed
Last computed: Aug 10, 2026