We sent identical email through all four major platforms and scored setup time, API ergonomics, deliverability, and price. The results were not what the marketing pages promise.
Resend is the shiny new email API that developers keep recommending. SendGrid is the veteran that runs huge chunks of the internet’s mail. I sent production traffic through both — here is the honest verdict.
They both send email, but they are built for completely different jobs. After running both for a year, here is the honest breakdown of where each one wins.
SendGrid’s dashboard has a hundred buttons, but the API you need daily is small. Restricted API keys, the Mail Send endpoint, dynamic templates, and event webhooks — the parts that matter.