
15Five began with one humane idea: ask people how work is going before the annual review arrives. Now it wants to turn that weekly pulse into an operating system for managers - AI included.
Mern Singh (Mrinal Singh) is the co-founder and CEO of Bolto, an AI-native platform that finds, vets, pays, and manages global software talent in one place. A Dartmouth graduate who left investment banking at Lazard, he built Bolto through Y Combinator's Summer 2023 batch after an early pivot, and has raised roughly $12.1M to date including a $12M Series A in 2026. He is an outspoken advocate for flat, lead-driven teams over traditional management.