MailChimp

More than 8 million businesses in 200 countries use MailChimp and Mandrill to send more than 14 billion email newsletters and transactional emails every month. Whether you're self-employed, you manage projects for clients, or you work for a Fortune 500 company, MailChimp has features and integrations that will suit your email marketing needs, while Mandrill has the power, speed and stability to serve as your company's email platform.