#9
Scale AI
Scale AI built its business on the unglamorous end of the AI pipeline — labelling and curating training data for customers including OpenAI, Google, Meta and the US Department of Defense, using a large contract workforce through its Remotasks platform. In June 2025 Meta took a 49% stake valuing the company at about $29 billion, and founder Alexandr Wang left to run Meta's superintelligence lab.
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