CarSignal

CarSignal is building an AI operating platform for independent auto repair shops that combines booking, diagnostics, estimates, parts ordering, payments, and customer communication in one place. The company addresses a fragmented workflow in which shops use separate software to manage jobs, diagnose vehicles, order parts, communicate with customers, and collect payments.

Sep 2026AngelsRoundNews article

CarSignal, co-founded by Junaid Popalzai, is building a smart operating system for auto repair shops. The YC S26 company is based in the United States, has a two-person team, and lists Y Combinator as an investor. Popalzai previously worked as a software engineer at Notion, Whatnot, Netflix, and HubSpot.

Aug 2026Company Launch TrackerNews article

Michael Muzzin launches CarSignal, an AI operating system designed to run an independent auto repair shop from the first customer call through final payment. The platform combines booking, vehicle intake, diagnostics, estimates, parts ordering, scheduling, customer messaging, invoicing, and payments. Muzzin and co-founder Junaid Popalzai say their experience growing up around mechanic shops informs the product, after watching their families manage back offices with paper, sticky notes, and software that does not share data.

Aug 2026RuntimeWireNews article

Junaid Popalzai is co-founder and CTO of CarSignal, an AI platform for the auto repair industry. A UC Berkeley electrical engineering and computer sciences graduate, he co-founds the company with high school friend Michael Muzzin in June 2026; CarSignal joins Y Combinator’s Summer 2026 batch and launches on August 17. Muzzin reports that two months after launch, the company serves more than 40 paying shops across 18 states.

Aug 2026The AlmanacNews article