Is Mailchimp Open Source?
Mailchimp is not open source, but there are 2 quality open source alternatives
While Mailchimp itself is proprietary, the top open source alternative is useSend. Looking for more options? There are 2 open source alternatives to Mailchimp. Other notable options include:
Notifuse.
These Mailchimp alternatives primarily fall under Email Management, Email Marketing or Email Sending Service. Explore these categories for more options or browse our complete list of Mailchimp alternatives.