ChimpConnect is the integration application that can help to connect mailchimp with Salesforce CRM. You can easily sync data automatically. Also you can easily manage and run your campaigns. eShopSync provides 5-day free trial so that you can check all its functionality with without any charge. As well as you can ask for customizations as per your business requirement and plan if you are using our connector.Follow our blog link for complete integration process.
https://eshopsync.com/mailchimp-salesforce-integration/