Clerk - Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.
GetChat.App - Add WhatsApp chat to your website for free
Twilio for Slack - Enable SMS conversations with Slack+Twilio
BlueReceipt - Text marketing customers love ❤️
Spike.sh - Spike is an incident management platform that alerts via slack, phone and email and automatic escalations to help teams fix infrastructure problems.
Textedly - Textedly is an SMS marketing communications channel that allows to advertise, promote, announce, and engage with audience through text messaging directly to cell phones.