OBQ 1016: If Zuckerberg was humble.

Zuckerberg was a cocky kid when his Social networking site crossed a million users, things have changed a lot since that time (or atleast we hope!).
Here is another Social network guy whose app and initial success is far bigger than any other social network still he is an humble pie!
Identify him and the app he started, even the app makes you humble ;-)

Answer: Sarahah and its founder.