Mailgun is email automation for developers. Use our REST APIs to effortlessly send, receive and track email from your website or application.
Cost / License
- Paid
- Proprietary
Platforms
- Online



Lettr is described as 'The Email API for modern builders — design beautiful templates, send with confidence, monitor everything in real time, and stay deliverable. Built for teams and ready for vibe-coding' and is a Email Marketing service in the business & commerce category. There are eight alternatives to Lettr for Web-based, SaaS and Amazon Web Services. The best Lettr alternative is Mailgun. It's not free, so if you're looking for a free alternative, you could try Sendgrid or Amazon Simple Email Service. Other great apps like Lettr are SMTP.com, turboSMTP, Resend.com and MailerSend.
Mailgun is email automation for developers. Use our REST APIs to effortlessly send, receive and track email from your website or application.



Scalable email delivery for transactional email SendGrid transparently handles DKIM, SPF, ISP rate limits, content inspection, bounces, and spam reports to help users achieve higher deliverability. SendGrid integrates in minutes by just changing three SMTP settings.

SMTP.com is an email infrastructure provider that helps deliver your emails to Internet Service Providers (ISPs). It improves your email delivery success rate by integrating your traffic into its reputable flow.

Amazon Simple Email Service (Amazon SES) is a cost-effective outbound-only email-sending service built on the reliable and scalable infrastructure that Amazon.com has developed to serve its own customer base.

turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all your marketing and transactional emails.



Build, test, and send transactional emails at scale. Resend provides the best developer experience helping you reach users instead of spam folders.



A new kind of transactional messaging service designed for developers to work faster and smarter with a powerful infrastructure to scale quickly.




Emailit is a versatile email sending platform catering to both marketers and developers. It offers flexible sending options through SMTP integration and a REST API, ensuring seamless integration with existing applications and software.

