Cloudmailin vs Axigen: What are the differences?

Cloudmailin: Incoming Email for your Web App. CloudMailin allows you to receive any volume of incoming email via a Webhook. You are given an email address that will forward any incoming message to your app, as an HTTP POST, within milliseconds. You can also seamlessly check the delivery status of each of your incoming emails via the dashboard, bounce emails that you do not wish to receive and use your own domain name; Axigen: Mail server, calendaring & collaboration. It is a fully self developed solution, truly innovative in several respects, particularly scalable and configurable. This messaging solution offers the entire range of mail services — SMTP, POP3, IMAP, WebMail (Desktop and Mobile versions) — includes List server, Logging, Reporting, and FTP Backup modules and provides various, flexible administration options (including a central Web administration interface — WebAdmin).

Cloudmailin and Axigen can be primarily classified as "Transactional Email" tools.

Some of the features offered by Cloudmailin are:

• Easily receive email in Ruby on Rails, PHP, .Net, Java, Django or any language/framework we forgot. Since the email is delivered as an HTTP Post it's simple.
• See the delivery status of the emails it has delivered to your app.
• No more polling or waiting for new processes to spawn. Email can arrive in as little as a few milliseconds.

On the other hand, Axigen provides the following key features:

• Calendaring
• Collaboration
• Fully customizable