3x founder

Harry Grewal

Founder & CEO WeReno (YC W22) | BuiltOS.com

Co-founder

WeReno· Winter 2022 San Francisco Bay Area

in LinkedIn

2026Co-founder· BuiltOS

Founder · since 2011

Company

BuiltOS

Role

Co-Founder

current

Stage

—

no public source

Raised

—

no public source

Based

San Francisco Bay Area

current

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

WeReno

AI owner's representative for commercial construction and renovations.

Winter 2022

Experience

Career

BuiltOS
Co-founder
Co-Founder · San Francisco Bay Area · 2026 – Present
2026
WeReno (YC W22)
Founder
Founder & CEO · San Francisco Bay Area · 2022 – Present
2022
DefenseTek Security
Founder
Founder & CEO · Toronto, ON · 2011 – 2021
2011

Bio

I’m a founder with 10+ years across security, construction, and real estate operations. I built DefenseTek Security into a national company serving 800+ clients, including Staples, TJ Maxx, and CVS. I founded WeReno, an AI owner’s rep that has supported $1B+ in project value, and am now building BuiltOS alongside it: software to help teams understand, operate, and improve buildings.