What are some alternatives?
When comparing Ranktab and IdeaScale, you can also consider the following products
Viima - Viima's mission is to allow companies to build what their customer wants, or in turn to fail faster with minimal wasted effort
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Crowdicity - Idea management software for smart organizations.
XMind - XMind is a brainstorming and mind mapping application.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Idea Spotlight - Idea Spotlight is a highly scalable and flexible platform that enables internal and external crowdsourcing initiatives for organisations.