Scale AI

Scale AI, Inc.
Company type	Privately held company
Industry	Information technology
Founded	2016
Founders	Alexandr Wang; Lucy Guo
Headquarters	San Francisco, California, U.S.
Key people	Alexandr Wang (CEO)
Number of employees	900 (2025)
Subsidiaries	Remotasks, Outlier.ai
Website	scale.com

Scale AI, Inc. is an American data annotation company based in San Francisco, California. It provides data labeling and model evaluation services to develop applications for artificial intelligence.

The company’s research arm, the Safety, Evaluation and Alignment Lab, focuses on evaluating and aligning large language models (LLMs),^[1] including through initiatives such as Humanity's Last Exam, a benchmark designed to assess advanced AI systems on alignment, reasoning, and safety.^[2] Scale AI outsources data labeling through its subsidiaries, Remotasks, which focuses on computer vision and autonomous vehicles,^[3] and Outlier, which focuses on data annotation for LLMs.^[4]

Scale AI's customers in the commercial sector include Etsy, General Motors, OpenAI, PayPal, Pinterest, Samsung, Toyota, and Uber.^[5]^[6] The company also directly works with world governments, including the United States on multiple military-related projects,^[7] and with Qatar to improve the efficiency of its social programs.^[8]

In June 2025, Meta Platforms agreed to take a 49% stake in Scale AI for $14.3 billion.

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^ Scale AI's 22-Year Old CEO Wants to Improve the Safety of Self-Driving Cars, August 8, 2019, retrieved January 14, 2024
^ "Data-labeling company Scale AI is worth $7.3 billion after new funding round". Fortune. Retrieved January 14, 2024.
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[5] Scale AI's 22-Year Old CEO Wants to Improve the Safety of Self-Driving Cars, August 8, 2019, retrieved January 14, 2024

[6] "Data-labeling company Scale AI is worth $7.3 billion after new funding round". Fortune. Retrieved January 14, 2024.

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