AfterQuery is a research lab redefining training artificial intelligence models by addressing a core, often overlooked bottleneck: the scarcity of truly high-quality, human-generated datasets that enable models to excel beyond surface-level performance. AfterQuery constructs datasets with rigorous validation and expert collaboration to push AI capabilities in complex, professional use cases such as finance, legal analysis, and multimodal understanding. By partnering with foundational model labs to create training data, AfterQuery is enhancing the performance, reliability, and reasoning depth of AI models.

Spencer Mateega is co-founder and CEO of AfterQuery. Prior to founding AfterQuery, Spencer worked in technology private equity at Silver Lake, investment banking at Morgan Stanley, and software engineering at Meta and Google. Spencer graduated with a bachelor’s degree in Finance and Statistics from the Wharton School and concurrently received his master’s in computer science from the University of Pennsylvania.

© 2025 Breakthrough Ventures. All Rights Reserved.

A marquee accelerator and showcase for young early-stage founders from all backgrounds.

© 2025 Breakthrough Ventures.

All Rights Reserved.

A marquee accelerator and showcase for young early-stage founders from all backgrounds.

© 2025 Breakthrough Ventures. All Rights Reserved.

A marquee accelerator and showcase for young early-stage founders from all backgrounds.

© 2025 Breakthrough Ventures. All Rights Reserved.

A marquee accelerator and showcase for young early-stage founders from all backgrounds.