Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.

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

WhosCall - WhosCall is a reliable caller ID app whose popularity has led to its adoption by many users including international media. You can now manage the numbers calling you regardless of whether they are part of your contact list or not... read more.

Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors

CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.

Zendesk for Startups - Everything you need for seamless customer conversations.