Actually, it's one less. Revel lets you run all your projects from Slack, so you don't have to spread your conversations and projects across multiple apps.
With Revel you can feature docs and tools to make sure that everyone is on the same page. Add Google docs, Jira boards, Calendars – whatever you want.
Make a project schedule, call it up at any time and receive automated notifications to the channel when events are due.
Project briefs let you intro the project, show key team members and important docs. New channel members see it when they join the project channel.
"We've stopped using other tools and now run our projects on Slack. Messages, project info, timelines all go into channel and that's that."
René Morency, MD @ Browser London
A 2 minute video of how Revel transforms your projects.