TRANSACTIONAL EMAILS & SMS
Billions of transactional messages. One API.
Deliver personalized transactional emails & SMS with a 99% delivery rate and 1-second send times—plus detailed documentation that can help improve your campaigns.
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#1
AI-powered email marketing and automations platform
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<1 second
Delivery time-to-inbox (median)
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157 billion
email sends per month (max)
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>99%
email delivery rate (average)*
NEW: Fast, dependable transactional SMS messages
With Mailchimp’s updated transactional API, businesses can send critical 1:1 text messages via SMS as well as email.
Get started today
Premium
Scale fast with dedicated onboarding, unlimited contacts, and priority support; built for teams.
Talk to Sales You've selected more contacts than this plan allows
Save 15% on 10,000+ contacts
per month for 12 months
Then, starts at per month†
- Phone & Priority Support
- Popup Forms
- Multivariate and A/B Testing
- Enhanced marketing automation flows
- Dedicated Personalized Onboarding
- Predictive Segmentation
- Behavioral Targeting
Standard
Sell even more with personalization, optimization tools, and enhanced automations.
Contact limit exceeded You've selected more contacts than this plan allows
Free for 14 days
Then, starts at 0 per month†
per month for 12 months
Then, starts at per month†
- 24/7 Email & Chat Support
- Popup Forms
- Multivariate & A/B Testing
- Enhanced marketing automation flows
- Personalized Onboarding
- Predictive Segmentation
- Behavioral Targeting
Essentials
Send the right content at the right time with testing and scheduling features.
Contact limit exceeded You've selected more contacts than this plan allows
Free for 14 days
Then, starts at 0 per month†
per month for 12 months
Then, starts at per month†
- 24/7 Email & Chat Support
- Popup Forms
- A/B Testing
- Basic marketing automation flows
-
Personalized Onboarding
-
Predictive Segmentation
-
Behavioral Targeting
Free
Easily create email campaigns and learn more about your customers.
Contact limit exceeded You've selected more contacts than this plan allows
$ 0 per month†
- Email support for first 30 days
- Popup Forms
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A/B Testing
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Basic marketing automation flows
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Onboarding
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Predictive Segmentation
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Behavioral Targeting
†See Free Trial Terms and Offer Terms.
Overagesapply if contact or email send limit is exceeded. Free plan sending will be paused if contact or email send limit is exceeded. Learn more.
Customize your settings from start to send
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Stay on-brand
Build emails from scratch or seamlessly import your Mailchimp templates.
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Manage inbound email
Respond to emails with an action, like sending an RSVP or updating a to-do list.
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Send from anywhere
Send from multiple domains or subdomains, all from one account.
Get world class support
Get in touch with our award-winning Support team for troubleshooting.
Learn more about Mailchimp transactional APIs and get started.
FAQs
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Mailchimp transactional email is a delivery API, or application programming interface, that can deliver transactional emails to customers without you overseeing the process.
Transactional emails, also known as “triggered emails,” are one-to-one messages sent when a specific action occurs or a request is made from the contact. For example, a customer may receive a transactional email with their order information after a purchase is complete. Other examples of transactional emails include account updates, password reminders, and notifications or alerts.
Compared to bulk marketing messages, transactional emails are only sent to one individual at a time rather than a group of people. Typically, these emails are time-sensitive and require you to deliver messages quickly. With our transactional email service, you can automatically send messages to the recipient’s email server in 1.79 seconds.
When you send a transactional email with Mailchimp, you can ensure customers receive the information they need in a timely manner. Not only do transactional emails have the power to boost customer satisfaction, but they can also increase loyalty and engagement since they’re capable of being personalized. Remember, every interaction with a customer is an opportunity to solidify your relationship with them.
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Our transactional email service allows you to reach customers quickly, ensuring they don’t have to wait long for relevant information to reach their inbox. You’ll also have access to email templates and our email builder to keep your transactional emails on brand. In addition to transactional email tools, our comprehensive marketing platform can help you stay on top of analytics, allowing you to test and refine your campaigns.
The best part is that you can try our transactional email software for free before committing to it. This way, you can see if this type of email is right for your business needs. Plus, new users can take advantage of the transactional email demo and send up to 500 transactional emails.
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Making a transactional email is easy with Mailchimp. Here’s how to get started:
- Ensure you have a Standard or higher monthly plan.
- Find the Automations tab and click Transactional Email.
- Click Pick a Plan and select the package you want.
- If you need more than 3 blocks for transactional emails, you can enter a custom amount.
- Indicate what you want to have happen if you run low on emails.
Once you finalize your selections, you’ll need to generate your API key to authenticate your request. You must also add a sending domain and configure your DNS. You can then begin sending transactional emails via the Transactional API or with SMTP integration. Mailchimp Transactional offers a delivery API that’s highly customizable, providing you the necessary tools to analyze, optimize, and track your sends. If this sounds confusing, don’t worry. When you use Mailchimp for transactional email templates and tools, you’ll have access to our award-winning support team. Our Mailchimp Support team can assist with troubleshooting transactional email services and provide guidance on next steps.
Disclaimers:
- #1 AI-powered email marketing platform: Based on May 2025 publicly available data on number of customers of competitors that also advertise using AI to enhance their email marketing and automation products and services.
- >99% Email Delivery Rate: Data reflects email delivery rate from January 1, 2024, to December 31, 2024 and is the aggregate of all Mailchimp users across all plans.
- Transactional Email Uptime: Uptime past performance is not a guarantee of future performance and may be affected by factors outside of our control.
- SMS Marketing: SMS is available as an add-on to paid plans in select countries. Application and agreement to terms is required before purchasing credits. Messages can only be delivered to contacts in the country selected. Australia messaging available only for contacts with +61 country code. SMS credits are added to your account after purchase and approval. Credits are issued monthly and unused credits expire and do not roll over. MMS only available for Standard and Premium plans sending to US and Canada contacts. Pricing varies. Click here for details.
- Availability of features and functionality varies by plan type. For details, please view Mailchimp's various plans and pricing.