Neptune.ai

New

Experiment tracker purpose-built for foundation model training.

MLOps PlatformsPalo Alto, California, United States51–200 employeesFounded 2017

#24 of 61 in MLOps Platforms 25% positive in AI answers

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Visibility score

2.6%

New vs last week

Weekly run · Nov 2

Data collected Nov 2, 2026·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run Nov 9, 2026

Neptune.ai ranks #24 of 61 in MLOps Platforms with an AI visibility score of 2.6 (SlateIndex, Nov 2, 2026).
Neptune.ai is most visible on Google AI Mode (6.8) and least on Perplexity (0).
AI engines name Neptune.ai in 4 of the 30 MLOps Platforms buyer prompts SlateIndex tracks.
amazon.com is the source AI engines cite most in answers about Neptune.ai, with 2 citations.

About

Company details for Neptune.ai

Neptune is an experiment tracker and metadata store for MLOps, used to log, compare and collaborate on machine learning experiments. It monitors thousands of per-layer metrics such as losses, gradients and activations, and includes a model registry and a query API. OpenAI agreed in December 2025 to acquire Neptune, and the hosted service is set to be phased out by March 2026. It ranks #24 of 61 in MLOps Platforms on SlateIndex and has a visibility score of 2.6 in the latest weekly run.

Founded in 2017 and headquartered in Palo Alto, California, United States, the company employs 51–200 people. It has raised about $18M. Its differentiator: built specifically for foundation model training, with per-layer metric monitoring at scale and no lag in visualization.

Website: neptune.ai
Categories: MLOps Platforms
Company size: 51–200 employees
Headquarters: Palo Alto, California, United States
Founded: 2017
Company type: Private, being acquired by OpenAI
Funding: Series A · $18M raised
Deployment: Hosted service by default, with a self-hosted option on-premises or on AWS, Google Cloud or Azure as a Kubernetes cluster, deployed as microservices via a Helm chart.
Platforms: AWS, Google Cloud, Azure, Kubernetes
Integrations: 25+ native

LinkedIn · linkedin.com/company/neptuneai

Read from linkedin.com, rfp.wiki, finance.yahoo.com, datatori.com, neptune.ai, tooldirectory.ai · refreshed Nov 2, 2026.

AI visibility

Latest weekly run · Nov 2 · next run Nov 9

Visibility score

2.6%

across MLOps Platforms answers, weighted by position

ChatGPT0.9%

AI Mode6.8%

Perplexity0%

Change

New

vs last week’s run

Category rank

#24 of 61

in MLOps Platforms

Mentions

in this week’s run

Share of voice

0.6%

of AI mentions in MLOps Platforms

Visibility score trend

Weekly runs over the last 60 days, with up to 7 competitors. Click a name to hide or show its line.

Now2.6%

30-day change—

High · low2.6% · 2.6%

Rank#24

Changes appear after the second weekly run in MLOps Platforms. MLflow leads the category at 50.9%.

AI mentions & citations

Recent answers that name Neptune.ai

All prompts

Which MLOps Platforms tools offer annual discounts?

Neptune.ai (Experiment tracking & metadata management) – Offers a discount on annual plans for its paid tiers like the Startup and Lab plans compared to paying month-to-month.[](https://www.guideflow.com/blog/mlops-…

Google AI Mode · run of Nov 2

Alternatives to the most popular MLOps platform

Neptune.ai — A lightweight, metadata store built specifically for experiment tracking.

Google AI Mode · run of Nov 2

Where can I sign up for an MLOps platform?

Neptune.ai: Metadata store and collaboration-first dashboard for tracking experiments and registering models.

Google AI Mode · run of Nov 2

Official website of the top MLOps platform vendors

Experiment tracking and model management: Weights & Biases, Comet, ClearML, Neptune.ai.

ChatGPT · run of Nov 2

Products & features

What Neptune.ai sells

Neptune experiment tracker

Logs, compares and collaborates on machine learning experiments, including thousands of per-layer metrics at scale.

Model registry

Registry for trained models, offered alongside the experiment tracker.

neptune-query

Query API for pulling metrics at scale.

Strengths engines cite

Collaboration-first dashboard for tracking experiments
Lightweight metadata store built for experiment tracking
Discounts on annual plans

Target market & buyers

Notable customers include OpenAI, Samsung, Roche, HP, Bioptimus, Navier AI.

Funding & recent developments

Funding

Round	Year	Amount
Seed	2018	$2M
Unnamed round	2020	$3M
Series A	2022	$8M

Latest known round	Total raised
Series A	$18M

Recent developments

Mar 2026ProductHosted platform set to shut down
Reporting from the period says the hosted platform was set to shut down by March 2026, with customers preparing data export and migration.
Dec 2025CompanyOpenAI announces acquisition of Neptune
OpenAI announced it will acquire Neptune, subject to closing conditions. Terms were not disclosed; reporting says the deal is paid in stock.
Dec 2025ProductNeptune to wind down external services
Neptune said it would wind down external services over the coming months and that customer data will not be transferred to OpenAI.

Competitive landscape

How Neptune.ai compares with its top three alternatives

All alternatives

Neptune.ai most often appears alongside MLflow, Databricks, Weights & Biases in AI answers.

vsNeptune.ai vs MLflow2.6% vs 50.9% visibility · MLflow leadsFull comparison vsNeptune.ai vs Databricks2.6% vs 46.2% visibility · Databricks leadsFull comparison vsNeptune.ai vs Weights & Biases2.6% vs 29.7% visibility · Weights & Biases leadsFull comparison

Brand	Visibility	Share of voice	vs last week	Starting price
Neptune.ai	2.6%	0.6%	New	Pricing not available
MLflow	50.9%	9.7%	New	Pricing not available
Databricks	46.2%	7.6%	New	Pricing not available
Weights & Biases	29.7%	7%	New	Pricing not available
ClearML	20.6%	4.5%	New	Free plan