Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
LibriVox - free public domain audiobooks
Drift - A messaging app that helps you grow your business.
DigitalBook.io - Free audio books and eBooks. Search, browse, listen, read and download over 100,000 free audio books and eBooks.
Zendesk for Startups - Everything you need for seamless customer conversations.