Context.IO vs PHPMailer: What are the differences?

What is Context.IO? A REST email API that makes it easy and fast to integrate your user's email data in your application. As soon as a mailbox is connected, we create a metadata index of its content starting from the most recent emails which become available from the API within seconds. Context.IO takes care of synching email data for your app so you don't have to build, scale and maintain this infrastructure yourself. Focus on what's unique to your business, we'll manage the technical details of integrating with arcane email server protocols.

What is PHPMailer? The classic email sending library for PHP. A full-featured email creation and transfer class for PHP. It is a class library for PHP that provides a collection of functions to build and send email messages. PHPMailer supports several ways of sending email: mail() , Sendmail, qmail & direct to SMTP servers.

Context.IO and PHPMailer can be primarily classified as "Email API" tools.

Some of the features offered by Context.IO are:

• REST Beats IMAP
• Contacts- Recipients and senders with stats like message count and latest sent/received.
• Files- Each attachment has a unique id to access its content and history.

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

• Integrated SMTP support - send without a local mail server
• Send emails with multiple To, CC, BCC and Reply-to addresses
• Multipart/alternative emails for mail clients that do not read HTML email

PHPMailer is an open source tool with 13.7K GitHub stars and 7.53K GitHub forks. Here's a link to PHPMailer's open source repository on GitHub.