Postmark API API alternatives

Sendgrid

Email

A cloud-based SMTP provider that allows you to send emails without having to maintain email servers

A service that provides solutions relating to marketing and/or transactional email and/or SMS

Temporary Email Service

Mandrill

Email

Mandrill is a reliable, scalable, and secure delivery API for transactional emails from websites and applications. It's ideal for sending data-driven transactional emails, including targeted e-commerce and personalized one-to-one messages.

Disposable temporary Email addresses

Postmark Account-level API

Email

Postmark makes sending and receiving email incredibly easy. The Account-level API allows users to configure all Servers, Domains, and Sender Signatures associated with an Account.

API for free email forwarding service

Email API and SMTP for sending transactional and bulk emails, with email testing sandbox for safe development

GraphQL API for creating and managing ephemeral e-mail inboxes

Email verification API

Validate email addresses for deliverability and spam

Email API for developers