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

Userlist - Userlist is an email marketing tool tailored to your SaaS needs. You'll find behavior-based campaigns, segmentation, and full support for company accounts. Userlist is perfect for SaaS marketing, user onboarding, and lifecycle email.

HelpSpace - The team inbox with super powers

Drift - A messaging app that helps you grow your business.

Papercups - Open source live customer chat

OmniChat by Freshchat - Engage, sell, and support from anywhere