Arielle Zuckerberg, a general partner at Long Journey Ventures and sister of Mark Zuckerberg, looks for what she calls "rizz and tiz" in founders.

Instagram and Facebook have a bit of a sibling rivalry that Mark Zuckerberg had to navigate. Emails and other documents from Meta reveal how Instagram started to "cannibalize" Facebook.

Mark Zuckerberg’s private emails about Facebook’s purchase of Instagram more than a decade ago came back to haunt Meta at its historic antitrust trial this week – and the outcome of the case ...

In an internal email surfaced as part of the Meta antitrust trial, Meta CEO Mark Zuckerberg fretted about the potential that the company’s Instagram acquisition may cannibalize Facebook.