Tim Cook Mark Zuckerberg
Apple CEO Tim Cook, left, and Meta CEO Mark Zuckerberg, right, have taken many shots at each other's companies and products over the years.
  • Meta CEO Mark Zuckerberg and Apple CEO Tim Cook have taken shots at each other's companies for years.
  • They've traded barbs over Apple's prices and Facebook's Cambridge Analytica scandal. 
  • Now, their companies have reached new battlegrounds: AI and their competing headsets.

Meta's Mark Zuckerberg and Apple's Tim Cook have a long-standing feud.