Sarah Leary, Nextdoor

sarah leary, founder netxdoor.
  • Company valuation: $1.1 billion

Sarah Leary grew up in a small town in Massachusetts where everyone knew everyone.

She worried as an adult that people were losing their sense of local community, a fear that helped lead to the creation of Nextdoor.

The startup is a private social network that allows neighbors to connect. It's used for things like finding babysitters and organizing neighborhood watch meetings.

Leary co-founded the company with Nirav Tolia, David Wiesen and Prakash Janakiraman in 2010.

It has grown from a single neighborhood in California to 160,000 neighborhoods across the U.S., U.K. and the Netherlands.

First published November 3, 2017: 10:08 AM ET

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