Directory
Mailchimp
Mainstream email marketing platform
Free tier + paidSEO, growth & newslettermailchimp.com
What it is
Mailchimp, now part of Intuit, is the incumbent email marketing platform: campaign builder, template library, automations, audience segmentation, landing pages and reporting, with the widest integration ecosystem of any email service provider. The free plan caps at 250 contacts.
Why it earns a slot
Every CMS, plugin and store already integrates with it, so it is the path of least resistance when a newsletter must connect to systems you do not control.
Know before you commit
The free tier shrank hard — 250 contacts and 500 monthly sends is barely a pilot. Intro pricing resets after 12 months, and billing counts contacts including unsubscribed ones on some plans.
Neighbourhood
How Mailchimp sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.
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