I bought Atlasmic two months ago and couldn't be happier. Every integration I have looked for and good pricing model. Love it. Also, the customer support team of theirs is active and very helpful.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Intercom on Customer Engagement - A book on how to create messages that drive engagement
Crisp Chat - Multi-channel customer support software
Customer.io Actions - Send messages across any channel - from push to postcards
SMS Bot Creator - Automate SMS replies using a bot
Segment Sources - Load CRM, billing, and other cloud data to your Warehouse