Sarahah - Sarahah is a Social Networking Application for providing anonymous feedback launched in 2016 and available to use on iOS and Android platforms.
Ask.fm - Curious? Just ask! Openly or anonymously.
Lipsi - This app is an often used app as an alternative for Sarahah.
Chancetime - Interviews in front of the world
Yastalk - Receive honest feedbacks from your co-workers, friends or knowns
Confessout - Anonymous messaging web app.