Series A · Sales & Marketing Tech · Barcelona, Spain · Founded 2021 · 101–200 employees
Topsort is a leading retail media infrastructure platform that enables marketplaces, retailers, and delivery apps to launch and scale auction-based advertising businesses via modular APIs — covering sponsored listings, display, offsite, in-store, and AI optimization across 40+ countries. Founded in 2021 by CEO Regina Ye, CTO Francisco Larrain, and Chief Scientist Michael Ostrovsky (a Stanford professor and auction theory expert), the company built a privacy-first, cookie-free ad stack using AI and machine learning. Topsort has raised a total of $43.2M over four rounds, including a $20M Series A in March 2024 at a $150M valuation led by Upload Ventures, Quiet Capital, and Pear Ventures. Notable customers include Glovo, Poshmark, and Cencosud, and the platform operates with sub-5ms auction latency across nine global regions. The company has 6 major hubs worldwide, including Barcelona, Boston, Santiago, São Paulo, Menlo Park, and Sydney.