PostGrid has been great for automating our insurance mails for our client
Lob - A simple API to integrate print & mail solutions into your applications.
Postalytics - Automated direct mail software that’s faster, smarter & better. Postalytics sends personalized direct mail from your CRM and analyzes delivery & response.
Growmail Automated Direct Mail - Growmail enables businesses to send letters and postcards instantly through Automated Direct Mail.
PoliteMail - PoliteMail is an online development and management platform that gives users various tools to create the most effective and impressive emails.
GhostMail - GhostMail provides a comprehensive Mail handling service that is designed to help busy individual and business organizations through forwarding or receiving posts and small parcels from all over the world.
Inkit - Direct Mail Software. Inkit is an inbound and outbound marketing platform that helps companies gain visitors, convert leads, and win sales.