Brightside

The problem

Families worry about elderly parents who live alone, and find out about a fall or an illness only when a phone call goes unanswered.

The solution

Brightside makes a friendly daily call, notices changes in mood or routine and tells the family the same day when something seems wrong.

Who it's for

Adults with a parent over 70 living alone.

Market

Bottom-up: about 30,000 customers like this in Japan and nearby, worth roughly $280 million a year at our prices.

Competition and edge

Headline metric

4,300 active users, growing 15% a month

The team

Yuki knows the customer and has sold to them before; Haruto has built this kind of system at scale. We have worked side by side since before Brightside had a name.

Worked together

More than 3 years

Hiring

A senior engineer and our first customer-success hire.

About the founder

Yuki Sato

Founder & CEO · Osaka, Japan · 8 years of experience

Yuki worked as a care manager for older people for eight years. Started Brightside in 2025 and works on it full-time from Osaka.

LinkedIn