Premailer vs Mailnest: What are the differences?

What is Premailer? Pre-flight for HTML email. For the best HTML e-mail delivery results, CSS should be inline. This is a huge pain and a simple newsletter becomes un-managable very quickly. This script is the solution.

What is Mailnest? Email QA tool to ensure delivery, quality & compatibility of emails. It is a one stop email testing platform which helps improve the emails being sent from application and reduce the costs associated with email workflow testing.

Premailer and Mailnest can be primarily classified as "Email Testing" tools.

Some of the features offered by Premailer are:

• CSS styles are converted to inline style attributes
• Relative paths are converted to absolute paths
• CSS properties are checked against e-mail client capabilities

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

• Email testing
• Email quality
• Email QA

Premailer is an open source tool with 2.06K GitHub stars and 341 GitHub forks. Here's a link to Premailer's open source repository on GitHub.