SAN FRANCISCO — Ellen Pao spent the last few years spotlighting the technology industry’s lack of diversity, in court and beyond. Erica Baker caused a stir at Google when she started a spreadsheet last year for employees to share their salaries, highlighting the pay disparities between those of different genders doing the same job. Laura I. Gómez founded a start-up focused on improving diversity in the hiring process.

Now the three — along with five other prominent Silicon Valley women from companies including Pinterest, Stripe and Slack — are starting an effort to collect and share data to help diversify the rank-and-file employees who make up tech companies. The nonprofit venture, called Project Include, was unveiled on Tuesday.

“The standard mantra for every company on diversity statistics is, ‘We’re not doing well, but we’re working on it,’” said Ms. Pao, a former venture capitalist at Kleiner Perkins Caufield & Byers, who sued the firm for accusations of gender discrimination and lost. “People don’t learn anything from that. Can you tell us what are you actually doing?”

The group’s push is one of the more visible diversity efforts to come from women in Silicon Valley as tech companies grapple with criticism over the makeup of their work forces, which skew white and male. Over the last few years, tech entrepreneurs like Kimberly Bryant of Black Girls Code and Laura Weidman Powers of Code 2040 have promoted the inclusion of young women and minorities in early computer science education programs with their start-ups.