Why Nucleus

Improving your models starts with improving your data.

Nucleus helps teams build better datasets. Bring your data, labels, and model predictions together to debug your ML models and improve your datasets.

  • data icon

    Visualize, explore, and slice your data

    See insights, search on custom metadata, and create data slices to track model performance on specific scenarios.

  • graph icon

    Debug your models

    Sort predictions by error metrics or explore interactive confusion matrices to quickly find specific examples of each model failure.

  • money icon

    Optimize your labeling spend

    Curate your unlabeled data with active learning to prioritize the highest-value data to send for labels next.

  • labels icon

    Label seamlessly

    Send data to Scale in one click for labeling, label it yourself with Nucleus’s built-in editor, or import and export labels via API.

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    Collaborate with your team

    Share links to slices, queries, and individual examples. Have ML engineers, labelers, and data ops specialists collaborate on the same platform.

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    Integrate with the Nucleus API

    Automate dataset uploads, add metadata, upload model predictions, and export from Nucleus with an intuitive API.

data inputs

Supported Annotation Types


  • Semantic Segmentation Semantic Segmentation
  • Instance Segmentation Instance Segmentation
  • Polygon Polygon
  • Classification Classification
  • Bounding Box Bounding Box
  • Polylines Polylines


  • Cuboids Cuboids
  • Points Point

How it Works

The dataset IDE for machine learning.

Optimize your labeling spend by identifying class imbalance, errors, and edge cases in your data with Scale Nucleus.

“KeepTruckin encounters all manners of surprising edge cases in real world data collection, so when it comes to knowing we’re labeling the most valuable subset of our collected data, we turn to Scale Nucleus. Its intuitive visualizations, query engine and Autotag help our teams improve both data quality and models, all in the same motion.”

Ali Rehan

Engineering Manager AI/Vision Products, KeepTruckin


Trusted by World Class Companies

Scale is trusted by leading machine learning teams to develop more accurate models.

  • airbnb
  • brex
  • etsy
  • general-motors
  • flexport
  • instacart
  • blend
  • nvidia
  • openai
  • paypal
  • sap
  • samsung
  • square
  • toyota
  • airforce
  • usarmy
  • aurora
  • irobot
  • lyft
  • linkedin
  • nuro
  • pinterest
  • skydio
  • zoox