10+ best email APIs in 2024 for developers [free & paid]

Email APIs have become an integral part of modern web and mobile applications, enabling seamless communication and automation. In 2024, developers have a wide range of options when it comes to choosing an email API, whether for sending transactional emails, marketing campaigns, or for other email-related tasks. Here, we present the 10+ best email APIs available in 2024, covering both free and paid options.

1. SendGrid

SendGrid is a popular email API known for its scalability and reliability. It offers a free plan for up to 100 emails per day, making it suitable for small projects and startups. Its paid plans provide advanced features like detailed analytics, A/B testing, and dedicated IP addresses.

2. Mailgun

Mailgun is another powerful email API that offers a generous free plan, allowing up to 10,000 free emails per month. It's known for its excellent deliverability rates and provides features like email validation, tracking, and analytics.

【AOTsend Email API】：AOTsend is a Managed Email Service for sending transactional emails. Support Email Types: reminders, authentication, confirmations, notifications, verification codes, invoices, password resets, account activations, billing statements, two-factor authentication (2FA), and one-time passwords (OTP) emails, etc. $0.28 per 1000 Emails. 99% Delivery, 98% Inbox Rate.

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3. Mailchimp

While primarily known for its email marketing services, Mailchimp also provides a robust transactional email API. Its paid plans offer advanced automation, segmentation, and personalization options, making it a great choice for marketing-heavy applications.

4. SparkPost

SparkPost is a high-volume email delivery service that caters to enterprises. It offers a free tier for developers to test the service, with paid plans providing features like real-time analytics, sub-account management, and dedicated support.

5. Mandrill

Mandrill, a product of Mailchimp, is specifically designed for transactional emails. It provides a simple and powerful API for sending personalized and targeted emails. While it doesn't offer a free plan, its paid plans are affordable and feature-rich.

6. Amazon Simple Email Service (SES)

Amazon SES is a cost-effective, scalable, and flexible email sending service from AWS. It's a great option for developers who are already using AWS for their infrastructure needs. It offers a free tier for limited usage and pays-as-you-go pricing for higher volumes.

7. Postmark

Postmark specializes in transactional email delivery, offering a simple and reliable API. Its pricing model is based on email volume, and it provides detailed analytics and tracking features.

8. SendinBlue

SendinBlue is an all-in-one marketing automation platform that also offers a robust email API. Its free plan allows up to 300 emails per day, while paid plans unlock advanced features like SMS marketing, landing pages, and more.

9. Mailjet

Mailjet provides a user-friendly email API with a focus on deliverability and personalization. It offers a free plan for up to 6,000 emails per month, with paid plans offering additional features and higher email volumes.

10. Elastic Email

Elastic Email is a cost-effective email delivery service that caters to both small businesses and enterprises. It offers a free trial and flexible pricing options based on email volume.

In conclusion, there are numerous email APIs available in 2024, catering to different needs and budgets. Whether you're looking for a free option for your startup or a feature-rich paid service for your enterprise, there's an email API that's perfect for your project.