Services like Sendgrid and Mailgun offer free tiers up to a certain number of emails sent per month (about 10k). But beyond the free allotment, the cost of sending emails begins to add up, especially when running an app that doesn't generate revenue.<p>How does the use of these, or similar, email services compare to using Gmail or Fastmail's SMTP servers to send all your app's emails, assuming they're mostly transactional?<p>What other options do you recommend for sending transactional emails at small scale (0 - 50k / month)?
Amazon's email service is extremely cheap [1].
I don't think you can go cheaper than them?<p><a href="https://aws.amazon.com/ses/" rel="nofollow">https://aws.amazon.com/ses/</a>