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

Clerk - Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.

Carrd - Simple, responsive one-page site creator.

Twilio for Slack - Enable SMS conversations with Slack+Twilio

Avochato - Text messaging for your business.

Spike.sh - Spike is an incident management platform that alerts via slack, phone and email and automatic escalations to help teams fix infrastructure problems.