WikiPro - All-in-one Business to Customer Communication
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Heymarket - The professional way to text message. Your customers are mobile. Heymarket helps you manage those relationships from your smartphone.
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.
Respond Flow - The Mailchimp of SMS
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.