Swift Missive is a fully featured email service provider built for creators and small-to-medium businesses that eliminates the hassle of contact maintenance and tiered feature-gates. It only charges you to send emails, so you do not have to worry about adding and removing contacts or juggling user accounts and features to keep your costs down. A ton of features are free and unlimited, and they don't get locked behind pricing tiers at all. So, things like unlimited contact storage, segments, seats, event types, read receipts, templates, campaigns, and access to all reports and automated email cleaning, are all included without additional charges. Additional freebies are listed on their website. Their (mostly) pay-as-you-email pricing is extremely transparent, predictable, and dead simple, so you always know what you'll be paying. Furthermore, you can easily predict what future costs will look like with simple math instead of crazy feature-gated formulas. They've recently added a handy AI interface that can both collaborate and execute on your marketing ideas, all from within the chatbox.