The name shares a Greek root with “apostrophe”—apo (“away”) and strephein (“to turn”). It encapsulates CEO Brian O’Kelley’s focus: ushering his business—and the advertising industry—toward a more efficient future ruled by AI.

“Adtech spent 20 years, 25 years, making things really complicated,” he said, “and simplifying it would have a significant impact.”

Already, Apostra’s agentic platform is handling automated media buys in the U.S., the U.K., Brazil, France, and some other markets for some “very large” brands totaling around $1.2