Slenke vs. Trello

Most workflows require a lot more than just boards and Trello strugles to manage anything that is remotley complicated.
With Slenke not only do you get boards, you get lists, calendars, team messaging, time tracking all in one spot.

Features
Threaded Posts and Comments
Instant Messaging
Searchable Messages & Posts
Post Bookmarking
Task Lists
Task Boards
Task Calendar
Unlimeted Task Hierarchy
Polls
Unlimeted File Storage
End to End encryption on all messages and files
Time Tracking
Time Resource Management
Guest Users
Multi Level Permission System
Slenke
Trello