I made an opensource alternative to Slack or Email, heavily inspired by Twist.com for teams collaboration that wont distract you all day.
Host it privately or try it out at threadli.com
Would love to know what you think?
Email is async already, and as long as you don't enable any notifications, you check emails at your preferred time. Same for Slack in principle, except maybe some coworkers expect quicker responses, but that depends on company culture (many are clear about Slack still being for async communication without immediate replies).
Tools are like a flowing river, they have a natural flow. Going against that flow is like swimming against a tide. Slack’s natural flow is urgency which is bad for focused work. Hence the need for threadli, which is essentially opensource Basecamp (Messages) or Twist really.