What are some alternatives?
When comparing DealRoom and Taiga, you can also consider the following products
TargetProcess - Agile Project Management Web Application
Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
Leantime - Lean project management for startups & small teams
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Hygger - Hygger - is an Agile project management tool with built-in prioritization.
Meistertask - MeisterTask is an intuitive task management and collaboration tool.