Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Avochato - Text messaging for your business.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Message Me - Website to create your contact business card

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

StackWhats - Add the WhatsApp Live Chat to your website