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.
A complete walkthrough of Resend’s email API: domain verification, your first send with curl, the Node SDK, error handling, and the webhooks you should set up on day one.