Dialogflow - Conversational UX Platform. (ex API.ai)

GeekPrank Chat Screenshot - Screenshot Generator Prank app provides features through which users can make screenshots of fake conversations to prank their friends and family members.

Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

Fake Text Message-Prank text app - Fake Text Message-Prank text app allows users to take screenshots of text messages from their favorite celebrities so they can share them on various social media platforms in order to prank other users.

Botkit - Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.

WhatsFake - Make fake conversations that look just like WhatsApp