Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
SaaS Pages - 900+ Screenshots of the best SaaS landing pages
Drift - A messaging app that helps you grow your business.
Landing Pages in MailChimp - Easy to build, custom landing pages for free
Crisp Chat - Multi-channel customer support software
Good Landing Page - Curated landing page examples for design inspiration