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Your car's warning light, explained before the tow truck

San FranciscoConsumerLive product

PITCHED AT THE SAN FRANCISCO NIGHT ON 4 NOVEMBER 2026

Most drivers have no engineering sense of the car they rely on, so when a light comes on the choice is a mechanic they must trust blindly or a friend who happens to know cars. Raste reads the operating data a modern vehicle already produces on every drive, looks for early signs of trouble, and gives a plain-language next step, so a small problem is fixed before it becomes a breakdown.

A warning light leaves a driver with three questions, what is wrong, how urgent is it and what should I do, and no good way to answer any of them. So problems are found late, when the engine has lost power or the car is already on the shoulder, and a repair that would have been modest if caught early becomes a rebuild. The car knew earlier: a modern vehicle's control units produce a stream of health data on every drive that almost nobody reads.

Raste reads it. The app monitors the vehicle's operating data, interprets the changes that signal a developing fault and translates them into clear next steps, with an overall status, a vehicle health view, driving behaviour and an assistant to ask what a new sound or smell might mean. The beachhead is used cars and the people who drive them, with fleets and vehicle manufacturers as the licensing path. Co-founded by Ashish Ranjan, whose engineering career ran from nuclear reactors at India's Department of Atomic Energy and rockets at ISRO to cars at Lucid, and Komal Taya.

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