Why this is on the list
Mailchimp is the industry standard for email marketing and it has a generous free tier — up to 500 contacts and 1,000 sends per month. Unlike Substack, it is built more for organisations than individual writers, which makes it better for things like event announcements, programme updates, and donor communications. If you are running a nonprofit or a structured programme and you need to send formatted, trackable emails to a list, Mailchimp is the right tool. The drag-and-drop editor means you do not need a designer to produce something that looks professional.