Postmark Alternatives

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

GoZen Growth is a user-friendly email marketing software with outcome-driven and industry-specific email templates. Get started and grow your business now.

Try for free freemium

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

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

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.

MailChimp is the best way to design, send, and share email newsletters.

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

turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all...

Use our powerful Email APIs to deliver all your business critical emails on time and to the Inbox. We are the world’s only ESP that gives cashback on emails opened.

Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world's non-spam email. Email delivery for companies big and small.

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!

Elastic Email is an all-in-one email delivery platform for both marketing and transactional email.

Easy to use, powerful and affordable email marketing application.

freemium $8.33 / Monthly