Transactional email API

Send one-to-one system emails, such as receipts and password resets, from your own software through an API or SMTP connection.
On this pageWhat it is

What it is

Transactional emails are the automatic messages your software sends because someone did something: a receipt after a purchase, a password reset, a booking confirmation or a login code. A transactional email API lets your website or app hand these messages to the tool, which delivers them. Some tools also offer SMTP, a standard connection that existing software can use with little change. Mailchimp, Brevo and Customer.io are examples of tools that list this feature.

Why it matters

These messages must arrive quickly and reliably, and they should not be mixed up with marketing emails. If a password reset sits in a promotions queue, the customer gives up. You need this if you run a web shop, a software product or a booking system that sends automatic emails. If you only send newsletters and campaigns, a normal email platform is enough.

What to check

  • Is transactional sending included in your plan, or sold as a separate product with its own limits.
  • Does it use separate sending infrastructure from marketing emails, so a campaign problem cannot delay receipts.
  • Can you see delivery status and bounces for each individual message.
  • Does it offer ready-made libraries or plugins for your platform, or does a developer need to build the connection.

Tools with Transactional email API

  • Brevo logo
    ToolClient acquisition
    Brevo
    Combines email and SMS marketing, marketing automation, and a built-in CRM in a single platform.

    Email nurture

    From €6.33/mo yearlyFree planAffiliate link
    Sign up on Brevo
  • Mailchimp logo
    ToolClient acquisition
    Mailchimp
    Send and automate marketing emails at scale, with templates and audience management for growing businesses.

    Email nurture

    From €11.64/moFree planAffiliate link
    Sign up on Mailchimp
  • Campaign Monitor by Marigold logo
    ToolClient acquisition
    Campaign Monitor by Marigold
    Provides analytics and reporting for email marketing campaigns to track performance and audience engagement metrics.

    Email nurture

    From $12/moFree planAffiliate link
    Sign up on Campaign Monitor by Marigold

In Email nurture ranking order; the number is each tool's place. Some of this is collected from public sources and not yet checked by us.

Email nurture tools without transactional email API

Also in other categories

Tools filed under other categories that have Transactional email API.