# MailerSend

> Developer-focused transactional email, SMS, and WhatsApp API and SMTP relay service with real-time delivery tracking and webhooks.

- Website: https://www.mailersend.com/?ref=devshelf.io
- DevShelf page: https://devshelf.io/resource/mailersend
- Pricing: Freemium, Pay-as-you-go
- Categories: [Email & Notification APIs](https://devshelf.io/category/email-notification-apis.md)
- Last checked: 2026-11-03

## About

MailerSend provides a reliable transactional email API and SMTP relay service designed for developers and modern applications. It supports sending emails, SMS, and WhatsApp messages with SDKs for major programming languages including Node.js, Python, PHP, Laravel, Go, Ruby, and Java. Features include real-time activity tracking, detailed API and SMTP logs, automatic suppression list management, inbound email routing, email verification APIs, and webhooks for event-driven workflows.

## Alternatives

- [Resend](https://devshelf.io/resource/resend.md): Email platform for developers to send transactional and marketing emails at scale with a focus on deliverability. (pricing: Freemium, Pay-as-you-go)
- [Postmark](https://devshelf.io/resource/postmark.md): Fast and reliable transactional email delivery service and API for developers, focusing on high inbox deliverability and message streams. (pricing: Freemium)
- [Mailgun](https://devshelf.io/resource/mailgun.md): Transactional email delivery service providing APIs for sending, validating, and optimizing email campaigns. (pricing: Freemium)

---

Source: DevShelf.io, the hand-reviewed catalog of dev tools and resources. Every resource is reviewed by hand before it is listed.