EmailOctopus Email marketing. Drip campaigns, segmentation, API. Free for 2,500 subscribers and 10,000 emails per month.

MailerLite Email marketing. Free for 1,000 subscribers and 12,000 monthly emails.

MailPoet Email marketing WordPress plugin. WooCommerce, segmentation. Free for 500 subscribers and 5,000 emails per month.

Mailchimp Email marketing. Free for 500 contacts and max emails of 1,000/mo or 500/day.

Brevo Email marketing. Free for sending 300 emails per day.

Buttondown Email newsletter tool, minimalist interface, markdown support, tags for segmentation. Recommended by Ben Borgers.

Sendinblue Brevo Email list software and SMS & WhatsApp campaigns. Recommended by Natsukashii Soul.

Litmus Email newsletter testing service. Recommended by EmailOctopus.