I used to use Snapchat previously, but all my friends (school, college, etc) started posting on IG stories rather than on Snapchat. My snapchat became a ghost town, and I shifted as well.

Still active on Reddit, but its more of community than a tool for personal relations. Android user so no iMessage. Slack & IRC not good to connect with school friends.

What I mean to say is the country I am in Facebook has a complete monopoly in our social life. And I am sure even in the US people cannot leave FB ecosystem.