Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Sonar - 2-way chat with your customers over SMS and FB Messenger
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
ThroughMessage - Uncomplicated customer chat for ecommerce websites
Free HelpCrunch Live Chat - Free live chat & in-app messenger for startups