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MailChimp is an email marketing service provider, founded in 2001. It has 2.5 million users and sends over 4 billion emails a month. It is a web-based service, although data can be downloaded and for some features there is an offline application. The company uses a monkey as a logo, and there are numerous monkey-related graphics and jokes on its website and in its communications. There is an option for users to turn off these.