18 Best Free Email API Services for Developers

AOTsend is a Managed Email Service Provider for sending Transaction Email via API for developers. 99% Delivery, 98% Inbox rate. $0.28 per 1000 emails. Start for free. Pay as you go. Check Top 10 Advantages of Managed Email API

Email APIs are crucial tools for developers, enabling seamless integration of email functionalities into various applications. Here, we explore the 18 best free email API services that developers can utilize to enhance their projects.

1. SendGrid

SendGrid offers a powerful and reliable email API that allows developers to send, receive, and track emails effortlessly. Its free plan includes up to 100 emails per day, making it ideal for small-scale projects or testing purposes.

2. Mailgun

Mailgun provides a robust email API for sending, receiving, and tracking transactional emails. Its free plan offers 10,000 free emails per month, making it suitable for developers with moderate emailing needs.

3. Mailjet

Mailjet's email API is known for its simplicity and ease of integration. The free plan allows up to 6,000 emails per month, perfect for those just starting out with email integration.

4. SparkPost

【AOTsend Email API】：
AOTsend is a Transactional Email Service API Provider specializing in Managed Email Service. 99% Delivery, 98% Inbox Rate. $0.28 per 1000 Emails.
AOT means Always On Time for email delivery.

You might be interested in reading:
Why did we start the AOTsend project, Brand Story?
What is a Managed Email API, Any Special?
Best 25+ Email Marketing Platforms (Authority,Keywords&Traffic Comparison)
Best 24+ Email Marketing Service (Price, Pros&Cons Comparison)
Email APIs vs SMTP: How they Works, Any Difference?

Offering a generous free tier of up to 15,000 emails per month, SparkPost's email API is a great choice for developers looking to send transactional emails without breaking the bank.

5. SendinBlue

SendinBlue's all-in-one marketing platform includes a powerful email API. Its free plan allows up to 300 emails per day, suitable for basic email marketing and transactional email needs.

6. Mandrill (Now Mailchimp Transactional)

Originally part of Mailchimp, Mandrill (now known as Mailchimp Transactional) provides a robust transactional email service. Its free plan includes up to 12,000 emails per month, ideal for developers with higher volume needs.

7. Postmark

Postmark specializes in transactional email delivery, offering a simple and reliable API. While they don't have a traditional free plan, they do offer a developer trial with 100 free emails for testing purposes.

8. Amazon Simple Email Service (SES)

Amazon SES provides a cost-effective, flexible, and scalable email sending and receiving service. While not completely free, its pay-as-you-go pricing model can be very cost-effective for developers with low volume needs.

9-18. Other Notable Services

In addition to the services mentioned above, there are several other notable email API providers such as MailerSend, SendPulse, Elastic Email, Pepipost, Moosend, SMTP2GO, EmailOctopus, and MailUp. These services offer various free plans or trial options, allowing developers to test and integrate their email functionalities.

In conclusion, there are numerous free email API services available for developers, each with its own unique features and limitations. Choosing the right service depends on your specific needs, whether it's sending transactional emails, managing email marketing campaigns, or simply testing email integrations. Exploring these options can help you find the perfect fit for your project.

Remember, when integrating an email API into your application, always consider factors like deliverability, scalability, and ease of use. The 18 services listed here are among the best free email API services for developers, providing a solid foundation for seamless email integration.

AOTsend adopts the decoupled architecture on email service design. Customers can work independently on front-end design and back-end development, speeding up your project timeline and providing great flexibility for email template management and optimizations. Check Top 10 Advantages of Managed Email API. 99% Delivery, 98% Inbox rate. $0.28 per 1000 emails. Start for free. Pay as you go.