SendPortal vs Mailgun: Features, Pricing and User Reviews 2026

SendPortal is an open-source email marketing application that you host on your own server. Unlike paid services that charge per subscriber or per email, SendPortal is completely free to download and use. You just pay for your own hosting and the email sending service you choose.

The platform includes all the features you need to run email campaigns: subscriber lists, custom templates, message tracking, and detailed reports. It can handle multiple workspaces, making it useful for agencies managing different clients. SendPortal connects to major email providers through APIs, which means you get professional email delivery at wholesale prices.

Because it is self-hosted, you maintain complete control over your data and can customize the platform to fit your exact needs.

Mailgun is a cloud-based email delivery service designed specifically for developers and businesses who need to send emails programmatically through their applications. Think of it as the engine that powers email functionality in websites and apps - from simple contact forms to complex automated email workflows.

The platform offers both RESTful APIs and SMTP relay services, giving developers flexibility in how they integrate email capabilities. Unlike traditional email marketing platforms with drag-and-drop editors, Mailgun focuses on programmatic email sending with features like real-time tracking, webhook notifications, and detailed delivery analytics.

What sets Mailgun apart is its focus on deliverability and developer experience. The service handles technical complexities like IP reputation management, email authentication, and spam compliance, while providing simple APIs that work with virtually any programming language including Python, PHP, Java, Ruby, and Node.js.