Gil Sadis, a 32-year-old entrepreneur in Tel Aviv, has used Startup Compass for about a year.

WSJ: Service Helps Start-Ups See Where They Stand

Mr. Sadis says Startup Compass helped him decide when to take his product to market.

WSJ: Service Helps Start-Ups See Where They Stand

In April, Startup Compass compared start-ups by geography and found that those in Silicon Valley have, on average, 3.15 mentors, compared with 2.85 in New York and 2.15 in London.

WSJ: Service Helps Start-Ups See Where They Stand

"If you don't understand where you are, it's hard to tell where you are going, " says Steve Blank, professor of entrepreneurship at University of California, Berkeley, and an investor in Startup Compass.

WSJ: Learning How Your Start-Up Stacks Up

Lizzie Hodgson, 38, turned to Startup Compass recently to see how her year-old company, Civicboom, which lets news organizations access and verify user-generated images and videos, stacked up against other tech start-ups.

WSJ: Learning How Your Start-Up Stacks Up

Steve Blank, adjunct professor of entrepreneurship at the University of California at Berkeley, who invested in Startup Compass in May and is an adviser to Mr. Marmer, says the service is valuable for entrepreneurs who are just starting out.

WSJ: Service Helps Start-Ups See Where They Stand

In one of its first data analyses in May 2011, Startup Compass discerned that tech start-ups with two or three founders were most able to strike a balance between sticking to a plan and changing the direction of the business.

WSJ: Service Helps Start-Ups See Where They Stand