https://www.theguardian.com/technology/2018/mar/31/youve-decided-to-delete-facebook-but-what-will-you-replace-it-with

For too many people considering leaping aboard the #DeleteFacebook bandwagon, the answer is simple: switch your photo and video sharing to Instagram and your messaging to WhatsApp. But what many do not realise is that both of those apps are owned by Facebook – since September 2012 and October 2014 respectively.

It is a mark of the company’s dominance of the social media landscape – Facebook has 2.13 billion monthly active users, WhatsApp 1.5 billion and Instagram 800 million – that finding a single alternative is difficult.