People that stacked Twist
Disclaimer: I work at Doist. Unsurprisingly, Doist practically runs on Twist. If you are interested in asynchronous thoughtful, long-form discussions I'd recommend giving Twist a try. Chat is also available, but where Twist really shines is in asynchronous communication.
Slack alternative designed for async comms: no online indicators, channel chats organized into threads so topical discussions are easy to find & follow. Team adoption was fits and starts but I think it will be powerful once we figure out norms around thread naming &categorization