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Postmark

Fast, deliverability-obsessed transactional email API built for developers

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Looking for a tool like Postmark (Fast, deliverability-obsessed transactional email API built for developers)? Below are 16 AI tools people use as an alternative to Postmark, ranked by leaderboard position. Each one is approved by our editors and worth comparing before you decide.

Mailjet
Mailjet

Email API and SMTP relay with a real-time collaborative template editor

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SparkPost
SparkPost

High-volume transactional email API with real-time deliverability analytics

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Resend
Resend

Developer-friendly email API built around React Email templates

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Mailgun
Mailgun

Developer-first email API for sending, receiving, and validating email at scale

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Amazon SES
Amazon SES

AWS's pay-as-you-go email sending and receiving infrastructure

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SendGrid
SendGrid

Twilio's widely used email API and SMTP relay for transactional and marketing mail

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