Transactional email
Each provider is profiled from its own documentation, with the source recorded against every figure. Included volume and the price per thousand beyond it pull in opposite directions across these providers, so the cheapest plan and the cheapest marginal email are rarely the same one.
Transactional email
Amazon SESUsage-billed email sending from AWS, with no monthly plan and per-1,000 pricing an order of magnitude below the managed services.MailgunEmail API priced by monthly volume, with short log retention on entry plans and inbound routing.PostmarkTransactional email service priced by monthly volume, with configurable log retention and inbound processing.ResendTransactional email API with a monthly sending allowance, per-1,000 overage and add-on dedicated IPs.
