Co-founder of WordPress; founder of Automattic. See also: http://ma.tt/
I spoke at Startup School in 2011: https://www.twitch.tv/videos/45877747
For more recent, check me out on How I Built This with Guy Raz: https://pca.st/ofk85jgu Or on the Verge: https://www.theverge.com/23506085/wordpress-twitter-tumblr-ceo-matt-mullenweg-elon-musk