Email API
9 providers in this category.
Email APIs send transactional and marketing email at scale over an API or SMTP, with deliverability tooling, templates, and sometimes inbound parsing. They handle the infrastructure and sender-reputation work of reaching the inbox. Compare free tier, transactional versus marketing focus, inbound parsing, deliverability features, and developer and API ergonomics.
Companies
Neutral ordering. Not a recommendation.
Amazon SES
aws.amazon.com/ses
Amazon SES (Simple Email Service) is AWS's low-cost, pay-as-you-go service for high-volume transactional and bulk email sending.
Brevo
www.brevo.com
Brevo, formerly Sendinblue, is a marketing and transactional communications platform spanning email, SMS, and automation for small and midsize businesses.
Loops
loops.so
Loops is an email platform built specifically for SaaS companies, combining marketing and campaign email with transactional sending in one tool.
MailerSend
www.mailersend.com
MailerSend is a transactional email service providing an Email API, SMTP relay, templates, and inbound email routing, built by the team behind MailerLite.
Mailgun
www.mailgun.com
Mailgun, now part of Sinch, is a developer-focused email delivery service for sending, receiving, and tracking email through an API and SMTP.
Postmark
postmarkapp.com
Postmark is an email delivery service specializing in fast, reliable transactional email such as receipts, password resets, and notifications.
Resend
resend.com
Resend is a modern, developer-first email API for sending transactional email, built by the team behind React Email with an emphasis on clean developer experience.
SMTP2GO
www.smtp2go.com
SMTP2GO is an email delivery service offering SMTP relay and an HTTP API for sending transactional email, with reporting, tracking, and webhooks.
Twilio SendGrid
sendgrid.com
Twilio SendGrid is an email delivery platform for sending transactional and marketing email through both a REST API and SMTP relay.