Mailchimp

Mailchimp is an American marketing automation platform and email marketing service. It is the trading name of its operator, Rocket Science Group, an American company founded in 2001 by Ben Chestnut and Mark Armstrong, with Dan Kurzius joining at a later date."Mailchimp, named after their e-card character, launched in 2001 and remained a side project for several years, earning a few thousand dollars a month." Mailchimp began as a paid service and added a freemium option in 2009.