Every time when you create a new MailChimp email campaign and send emails to your client in MailChimp, the same Campaign migrates to your Zoho CRM. You can easily see your subscribers and their mail statuses (sent, opened, bounced) stored in Zoho for each contact in Zoho on Contact profile page as well as Campaign profile page. You can easily create Zoho CRM reports such as how much money you get from your email campaigns, which campaign has brought more sells etc.
Cost: depends on your requirements. Get a Quote