MailChimp - MailChimp is the best way to design, send, and share email newsletters.
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
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.
Postscript - Like Mailchimp for SMS
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
IG MASS DMS - Seamlessly reach any target audience by using our mass dm software.