Scale AI

Market position

Scale describes itself as powering 90% of the world's leading generative AI model builders and operates leaderboards and private benchmarks used to measure frontier models. Reported revenue was $870 million in 2024, with a valuation of $29 billion cited on its own site and roughly $14 billion at its May 2024 round; Meta's 49% stake was valued at more than $14 billion in June 2025.

Scale positions itself on the combination of frontier research, large-scale high-quality data production with vetted contributors (25% stated to hold advanced degrees), independent evaluation and benchmarking authority, and deployment experience spanning commercial and classified government environments with human-in-the-loop oversight and end-to-end ownership of outcomes.

Technology

Core technology comprises a proprietary Data Engine for producing high-quality training data, annotation tooling for images, semantic segmentation, 3D point clouds, LiDAR and RADAR, RLHF pipelines, an evaluation and red-teaming platform with public and private leaderboards, and the Scale GenerativeAI Platform. Public sector capabilities include a scalable multi-agent architecture with decomposable reasoning and external system integration, multi-classification access (CUI, SIPR, TS), and an end-to-end ML Ops platform for computer vision, all combined with human-in-the-loop subject matter experts.

Go-to-market

Direct enterprise and government sales supported by a "book a demo" motion on its website, partnerships with frontier AI labs, public sector contracting with the Department of Defense, Intelligence Community and federal civilian agencies, availability through AWS Marketplace for the U.S. National Security Community, and public benchmarking/leaderboard and policy-advocacy activity that supports positioning with AI developers and governments.

Frontier AI model developers and technology companies (Meta, Microsoft, Google, OpenAI), large enterprises across automotive, energy, healthcare, media, education, real estate and financial services (General Motors, Toyota Research Institute, BP, Cengage, Time, Mayo Clinic, Howard Hughes, Morgan Stanley, Brex, Instacart, Flexport, Shore Capital), robotics companies (Physical Intelligence, Universal Robots), research organizations (Center for AI Safety), and governments including the U.S. Department of Defense, Intelligence Community, U.S. Army, Defense Innovation Unit, CDAO and the Qatari government.

Geography

Headquartered in San Francisco, California, with an office opened in St. Louis in 2022 and job listings across New York, Seattle, Washington DC and remote roles in the US, Europe and Asia. Contributors are sourced globally, and the company works with governments including the United States and Qatar.

History

Scale was founded in 2016 by Alexandr Wang and Lucy Guo, going through Y Combinator's Summer 2016 batch; the two had previously worked together at Quora. Guo was fired in 2018. In August 2019 a $100 million investment led by Founders Fund pushed the valuation above $1 billion. Scale contracted with the U.S. Department of Defense in 2020, and in May 2021 former U.S. Chief Technology Officer Michael Kratsios joined as managing director and head of strategy. By July 2021 the company was valued at $7 billion following a financing led by Greenoaks, Dragoneer and Tiger Global. In January 2022 it won a $250 million contract providing federal agencies access to its tool suite, and that February it built an Automated Damage Identification Service analyzing satellite imagery of building damage after the Russian invasion of Ukraine for humanitarian groups. It opened a St. Louis office in 2022 and was named to Time's Best Inventions of 2022 list. Scale laid off 20% of its workforce in January 2023. Later milestones include the May 2023 XVIII Airborne Corps deal, becoming OpenAI's "preferred partner" for fine-tuning GPT-3.5 in August 2023, participation in Meta's Purple Llama initiative in December 2023, a Department of Defense LLM test-and-evaluation contract in February 2024, an Accel-led round at nearly $13 billion in March 2024 and a $1 billion round at a $14 billion valuation in May 2024, and an August 2024 agreement with the U.S. AI Safety Institute. In 2025 it released Humanity's Last Exam with the Center for AI Safety, signed a five-year partnership with the Qatari government, became a third-party model evaluator for the U.S. AI Safety Institute, and won a multimillion-dollar DoD deal for the Thunderforge military planning project. In June 2025 Meta Platforms paid more than $14 billion for a 49% non-voting stake and Alexandr Wang left to join Meta, with Jason Droege becoming CEO; the company subsequently announced the appointment of Francis deSouza, previously a Google Cloud executive/COO, as CEO.

Risks & controversies

In December 2024 a former employee sued Scale alleging wage theft and worker misclassification, and a second employee filed a similar suit the following month. In January 2025 several contractors sued the company alleging psychological harm from exposure to disturbing content. The company laid off 20% of its workforce in January 2023. Its defense work, including Defense Llama and Thunderforge, and reporting on U.S. military automation have drawn public scrutiny. Meta's 49% ownership stake and the departure of the founder-CEO, followed by further CEO turnover, represent governance and continuity considerations.