When comparing Waffle.io vs Priority Matrix, the Slant community recommends Priority Matrix for most people. In the question“What is the best task management software for small teams?” Priority Matrix is ranked 23rd while Waffle.io is ranked 41st. The most important reason people chose Priority Matrix is:
Priority Matrix helps me focus on what's truly important on my todo list, so I can work more efficiently.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Free for public repos
Any public GitHub repositories can use the software for free.

Pro Links GitHub issues with a Kanban board
Existing GitHub issues can be used to create tasks and managed in a more convenient Kanban style.

Pro Real-time
Each update is visible as soon as it is made.
Pro Helps prioritize, rather than simply listing tasks
Priority Matrix helps me focus on what's truly important on my todo list, so I can work more efficiently.
Pro Super easy to share / delegate tasks
All I have to do is press a button, rather than drafting a whole email to one of my co-workers.
Pro Solid methodology
The software implements time proven methodologies; not just a to-do list.
Pro Lots of different views
Priority Matrix makes it really easy to see your task list in different ways: You can see it in the quadrant view, calendar view, a filterable list, and also a Gantt Chart if you have the business license.
Full disclosure: Originally posted by an Appfluence Intern (who was equally impressed with the software's layout and functionality before working there)
Cons
Con Managing large project may be difficult
Waffle works best with medium to small projects and very high-level general overviews and less with projects that require very granular management due to the fact that it becomes considerably more difficult to keep track of various cards and priorities as they are pushed off screen very quickly.
Con Expensive
Used to be free, is now $12+ a month.
