Hi! I'm the author of this blogpost. Thanks for posting it! Happy to answer any questions that anyone may have. If it's of interest, we also published a 2022 version last year, so you can see how things changed: https://getwaitlist.com/blog/solo-dev-startup-stack
TL;DR almost all transactional email services are very expensive, and they're driving most of our increased costs as we scale. Almost all other services we use have good, free/low-cost plans that don't break the bank as we grow.
Hi! I'm the author of this blogpost. Thanks for posting it! Happy to answer any questions that anyone may have. If it's of interest, we also published a 2022 version last year, so you can see how things changed: https://getwaitlist.com/blog/solo-dev-startup-stack
TL;DR almost all transactional email services are very expensive, and they're driving most of our increased costs as we scale. Almost all other services we use have good, free/low-cost plans that don't break the bank as we grow.