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As Silicon Valley struggles with inclusion and discrimination, most of the area’s tech companies won’t share raw numbers on workforce demographics with the public. Slack is one of 188 Silicon Valley tech companies surveyed by Reveal that have not released the numbers they report to the government on employee diversity. Instead, Slack and some other companies create their own diversity reports, such as the 2017 report pictured here.

Credit: Photo illustration by Gabriel Hongsdusit/Reveal

Hidden figures: How Silicon Valley keeps diversity data secret