Data labeling & annotation · Scale AI, Inc.

Scale AI

Large-scale data-labeling and data-engine platform combining tooling, managed human workforces and RLHF services for AI training data.

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Scale AI provides both the software to label data (images, video, text, LiDAR/sensor data) and access to managed human labeling workforces, positioning itself as a full "Data Engine" rather than a labeling tool alone. Beyond traditional annotation it offers Generative AI Data Engine services — RLHF, model evaluation and red-teaming — aimed at foundation-model builders, alongside its self-serve Data Engine for uploading, curating and annotating smaller datasets directly. Self-serve pricing is pay-as-you-go with a limited free allowance; larger programs go through enterprise contracts with SLAs and dedicated support. It suits teams needing outsourced labeling capacity and quality management at scale, not just an annotation interface for an in-house labeling team.

At a glance

Vendor Scale AI, Inc.
Pricing model Usage-based
Free tier Yes
Deployment Cloud
Open source No
Best for Foundation-model builders and enterprises needing outsourced labeling capacity, not just an annotation UI.

Pricing

Self-serve Data Engine is pay-as-you-go with a small free allowance; larger programs are custom enterprise contracts.

Plan Price Notes
Self-Serve Data Engine pay as you go first 1,000 labeling units and first 10,000 uploaded/curated images free
Enterprise custom enterprise-grade SLAs, dedicated support, GenAI data services, contact sales

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Features

  • Managed human labeling workforce alongside self-serve tooling
  • Image, video, text, LiDAR and multi-sensor annotation
  • RLHF and human-feedback data collection for LLMs
  • Model evaluation and red-teaming services
  • Data curation and quality-control workflows
  • API and SDK for programmatic task submission
  • Enterprise SLAs and dedicated support on larger contracts

Integrations

Profile last reviewed September 21, 2026

Head to head

Alternatives

Labelbox Enterprise annotation and data-curation platform (Annotate, Catalog) that has expanded into RLHF and agent-training data services. Surge AI Human-data platform providing an expert labeling workforce and off-the-shelf RL environments for training and evaluating LLMs. Snorkel AI Programmatic-labeling platform (Snorkel Flow) that generates training labels from heuristic rules and weak supervision instead of manual annotation.

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Terms to know

Machine learning Building models that learn patterns from data to make predictions or decisions, rather than following hand-coded rules. LLM evaluation Systematically testing a language model's outputs for quality, accuracy, safety, and consistency before and after deployment.

Related guides

How to choose a data labeling tool Choosing a labeling tool means choosing between a UI you staff yourself, a vendor's workforce, or skipping manual labeling altogether.