Thunderclap is a tool that lets a message be heard when you and your friends say it together. Think of it as an "online flash mob."
Join a Thunderclap, and you and others will share the same message at the same time, spreading an idea through Facebook, Twitter, and Tumblr that cannot be ignored.
Social media is an easy way to say something, but it’s a difficult way to be heard. Thunderclap is the first-ever crowdspeaking platform that helps people be heard by saying something together. It allows a single message to be mass-shared, flash mob-style, so it rises above the noise of your social networks. By boosting the signal at the same time, Thunderclap helps a single person create action and change like never before.