avaamo - Simple, Secure Business Messaging
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
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.
Facebook Messenger - Facebook Messenger is a faster way to message.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.