Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Avochato - Text messaging for your business.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Message Me - Website to create your contact business card
GoSquared Live Chat - Beautiful, simple, and free live chat for your website
StackWhats - Add the WhatsApp Live Chat to your website