1. Pricing Model: The key difference between Amazon SES and Mailgun lies in their pricing models. Amazon SES offers a pay-as-you-go pricing model, where users are charged based on the number of emails sent and additional features used. On the other hand, Mailgun offers a tiered pricing model, where users can choose from different plans that provide specific email volumes and features. This difference in pricing models allows users to select the most suitable option based on their expected email volume and budget.

2. Email Deliverability: Another important difference is the email deliverability of both services. Amazon SES leverages the infrastructure of Amazon Web Services (AWS), which is known for its reliability and high deliverability rates. It also provides additional features like dedicated IP addresses and domain reputation management to improve email deliverability. Mailgun also focuses on email deliverability and provides tools like real-time analytics, recipient validation, and automatic IP warm-up to optimize email delivery. However, the underlying infrastructure and deliverability rates may vary between the two services.

3. API Integration: When it comes to API integration, both Amazon SES and Mailgun offer robust APIs for seamless integration with applications and platforms. However, there might be differences in terms of ease of use and available features. Amazon SES provides a comprehensive API with extensive documentation and SDKs for different programming languages, allowing developers to easily integrate and control email sending. Mailgun also offers a powerful API with features like email parsing, webhooks, and email validation. The choice between the two services may depend on the specific requirements and level of technical expertise of the users.

4. Email Management Tools: Both Amazon SES and Mailgun provide email management tools to simplify the process of sending and tracking emails. Amazon SES offers features like bounce and complaint handling, email event tracking, and email template management. It also integrates with other AWS services, such as Amazon S3 and Amazon CloudWatch, for enhanced email management capabilities. Mailgun offers similar features like bounce and spam complaint handling, advanced email tracking, and customizable email templates. The choice between the two services may depend on the specific requirements and preferred user interface of the users.

5. Additional Services: Apart from email delivery, Amazon SES and Mailgun also offer additional services that can enhance the overall email experience. Amazon SES provides services like email content filtering, inbound email processing, and email notifications. It also integrates with other AWS services, such as Amazon SNS and Amazon Lambda, for further automation and customization. Mailgun offers features like email validation, email validation API, and email list management tools. These additional services can complement the core email delivery functionalities and provide added value to users.

6. Support and Documentation: Support and documentation are important factors to consider when choosing an email delivery service. Amazon SES offers detailed documentation, a knowledge base, and developer forums to assist users in understanding and utilizing the service effectively. It also provides support through the AWS Support Center. Mailgun also provides comprehensive documentation, API references, and guides to help users integrate and troubleshoot the service. Additionally, Mailgun offers support through email and live chat. The level of support and available resources may influence the decision between the two services.

In Summary, Amazon SES and Mailgun differ in their pricing models, email deliverability, API integration, email management tools, additional services, and support/documentation. The choice between these services depends on factors such as budget, desired email deliverability, technical requirements, required features, and level of support needed.