I’ve been pretty content with Postmark but I decided to compare pricing out of curiosity.
The free tier Remails offers is pretty generous in my opinion (3k a month) and I really like when the people making a service make blog posts like this. However having the next tier up (100k a month) start at €100 is a no go for me. It’s not that I think the price is bad, it’s that for my service I expect to send only 30k per month by the end of the year. Having a smaller capacity tier would be great for small but not tiny projects.
An alternative is Lettermint[1] which has much more gradual (and slightly lower, but with a less generous free plan) pricing. It's also pretty new (I think it launched last year) but more fully featured. I haven't used it but it seems good.
+1 I feel like Remails should try to have a more flexible pricing as well (I would love it if they can have 1000 mails per x euros or similar to lettermint pricing), it seems decent but remails has a higher free tier than lettermint so I hope that remails can revamp its pricing to include middle points (similar to lettermint in this instance) while still being price competitive.