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.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Litmus - litmus tests and tracks your email campaigns, so you can always put your best design forward.
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Return Path - Inbox placement solutions from Return Path helps improve email deliverability and increases email marketing ROI.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.