Overview
Neptune.ai is a Warsaw-founded company that built an experiment tracking platform for machine learning teams, used to log, compare and monitor model training runs. Founder Piotr Niedzwiedz is its CEO. OpenAI agreed to acquire Neptune in December 2025.
Verified record
- Verified deployments
- None on file
- Active incidents
- None on file
Key facts
Acquisition (reported, unconfirmed)
Estimated 2025 ARR (reported, unconfirmed)
Notable customers (reported, unconfirmed)
Data & sources
Web sources
1
1 source backing this record.View all →
Partnerships
Every company Neptune.ai has built with, alongside the ones only announced in a press release.
Most-frequent partners
- 1OpenAI1× joint5 total
Most recent
- OpenAI x Neptune.ai (acquisition)2025-12-03with OpenAIoperating
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
Mentioned on (4)
Registry pages whose text names Neptune.ai.
People (4)
Piotr Niedzwiedz, Jakub Czakon, Paulina Prachnio, Piotr Lusakowski
Financial state
- Total funding
- $69.7M
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 total · 1 operating
Every company Neptune.ai has built with, alongside the ones only announced in a press release.
Most recent
- OpenAI x Neptune.ai (acquisition)2025-12-03with OpenAIoperating
Most-frequent partners
- 1OpenAI1× joint5 total
Funding rounds (2)
Neptune.ai’s 2 disclosed rounds, $10M in total, oldest to newest.
- Series A2022-04-18
$8M(reported)
Investors: Almaz Capital (lead), btov Partners (follow), Rheingau Founders (follow), TDJ Pitango Ventures (follow)
- Seed2018-01-01
$2M(reported)
Investors: Almaz Capital (lead)
Timeline
Every recorded move in Neptune.ai’s history, most recent first: funding rounds, partnerships, acquisitions, supply-chain starts, key hires, and press.
PartnershipOpenAI x Neptune.ai (acquisition)
2025-12-03OpenAI entered a definitive agreement to acquire Neptune.ai, an MLOps experiment tracking and model monitoring startup. Neptune's tools will be integrated into OpenAI's model training stack. Neptune will wind down external services following the acquisition.
Funding roundSeries B funding round
2024-08-01Series B raising $60000000
Funding roundSeries A funding round
2022-04-18Series A raising $8000000
Funding roundSeed funding round
2018-09-18Seed raising $1700000
Recent activity
Every change to this record is dated, sourced, and independently verified where marked.
- Record createdAug 9, 2026
Added to the verified registry
Sources (1)
Common questions
What is Neptune.ai?
What does Neptune.ai make?
Is Neptune.ai publicly traded?
Who is the CEO of Neptune.ai?
How can I invest in Neptune.ai?
Where is Neptune.ai headquartered?
How much funding has Neptune.ai raised?
Who owns Neptune.ai?
Is Neptune.ai a top robotics company?
Is Neptune.ai safe?
Methodology: Verified · 1 source (no primary) · last reviewed 2026-10-22
Verification posture
Verified
Low confidence
Review state
Stable
Last reviewed 2026-10-22
Sources by quality tier
- 1
- unclassified
- Unclassified source
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
Heat Index
Category contender77/100
A composite of competitive footprint, funding, press velocity, active partnerships, and supply-chain edges. Different from the Intelligence score below (which is per-form-factor productization). Non-robotics companies cap at 25.
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.
6-month trend
Analysis
Funding runway warrants monitoring: last known round 55 months ago.
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: Nov 8, 2026