Transactional Email

Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Open Source

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

Visit website paid $19.5 / Monthly (Pro)

Scale your business email & marketing messages with Amazon Simple Email Service (SES), a cost-effective and reliable cloud email service. Sign up today.

Open Source

All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.

Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.

AhaSend is a pay-as-you-go Transactional Email Service Provider. Experience fair, transparent pricing and superior delivery with AhaSend.

freemium

Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.

The simplest way to send transactional emails. Sidemail makes sending transactional emails trivial, it's perfect for side projects, MVPs or the next big thing.

Take control of your transactional email. sendwithus is the missing tool for marketers to manage and optimize transactional emails.

Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.

Open Source

Open source mail delivery platform, alternative to Mailgun or Sendgrid

Open Source

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

This tiny tool uses a real Gmail account to check if your emails will land in the Primary inbox of a reader or if it's stuck in the promotions tab or SPAM folder.