Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
SendOut - Affordable email marketing for bloggers and influencers
Drift - A messaging app that helps you grow your business.
Mailblast - Email marketing on a budget using Amazon SES
Crisp Chat - Multi-channel customer support software
Platformly - Platformly is a suite of tools for multi-channel marketing automation.