Hello, @Soumya,
No, you don’t need to use the Mailpoet plugin along with MailChimp.you can Uninstall the Mailpoet plugin.
Our theme XStore is compatible with the MailChimp newsletter plugin.
Further, you can read the article here: https://www.wpexplorer.com/mailpoet-vs-mailchimp-wordpress/
Regards 8Themes Team.
