The best I've found so far

I used Mailchimp for around a decade but found their pricing became prohibitive, then trialled Sendinblue, and eventually (after that wasted time), I discovered Mail Blaze around five years ago. They're based right here in good ol' South Africa.

What appeals most about Mail Blaze is that the design interface feels a lot like Gutenberg, if you're fami**** with WordPress website editing or design. It's really easy to move text blocks, images, and other design elements up or down. The image library is also quick and easy to navigate. They've just updated their analytics, which I'm still learning to use. It looks like a lot of new insights are now available.

I've always found their support incredibly helpful, attentive, well-mannered, and knowledgeable. I think Blaze offers world-class features at affordable pricing, married to great customer service.

Last, I feel a sense of national pride that a South African company can produce a platform that is easy to use, works well, and has excellent support. Well done Mail Blaze!