PostGrid has been great for automating our insurance mails for our client
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Lob - A simple API to integrate print & mail solutions into your applications.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Postalytics - Automated direct mail software that’s faster, smarter & better. Postalytics sends personalized direct mail from your CRM and analyzes delivery & response.
SendPulse - Maximizing e-mail marketing open rates automatically
Growmail Automated Direct Mail - Growmail enables businesses to send letters and postcards instantly through Automated Direct Mail.