MailShelf Pro VS MasterBase

Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.

Yesmail - Yesmail provides email marketing solutions that integrate mobile, web, and social channels for marketers.

Athena Archiver - Athena Archiver Email Archiving Solutions provide enhanced disaster recovery options by enabling automatic off-site email storage and data replication to a mirror site.

PostageApp - PostageApp is an email management service that makes it easy to design, deliver, and manage all of the email that websites or applications send.

Thexyz - Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.

SendGrid - Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free