Fed up with paying a non-trivial monthly fee to SendGrid for a bunch of features and email capacity I don't use, I had looked for a long time for an alternative before coming across EmailIt.

Signup and switching providers was trivial, though I only use transactional email so can't speak for marketing lists.

The portal is simple but effective and support has been helpful so far for the small teething issues I had.

Few frills, but it does what I need.