MailChimp is a marketing automation platform and an email marketing service and a trading name of its operator, Rocket Science Group, an American company. MailChimp began as a paid service and added a freemium option in 2009. Within a year its user base had grown from 85,000 to 450,000. By June 2014, it was sending over 10 billion emails per month on behalf of its users. In 2017, the company was gaining 14,000 new customers every day. The company is still owned by its cofounders and has never accepted venture capital funds.
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