The best alternatives to Chilonji are tbh app, Postmodern., and Lettmess. If these 3 options don't work for you, we've listed a few more alternatives below.
Lettmess is a platform in which you can send random and anonymous letters. We will deliver your letter to it's address within 3 hours. Letters contain at least 528 characters and you can send up to 5 letters in 24 hours.
Postagraph is your digital home. It is an intimate and private space for messaging and connecting with the people you choose. Postagraph gives you total control over the people in your space and there's no selling of your data, ever. No ads, ever!