Yes, both GroupMap and Thoughtflow offer a Free Trial.
GroupMap is designed for Large Enterprises, Medium Business and Small Business.
Thoughtflow is designed for Individuals, Medium Business and Small Business.
Pricing for GroupMap Starts at $16.66/User/Month when Billed Yearly whereas for Thoughtflow Starts at $5/Month when Billed Yearly.
Some top alternatives to GroupMap includes Miro, GitMind, MindManager, MindGenius, MindMup, Bubbl.us, NovaMind, Thoughtflow, MindMaster and iMindQ.
Some top alternatives to Thoughtflow includes KnowFlow, Focusplan, Mindomo, MindManager, GroupMap, MindMup, NovaMind, MindMaster, Thinkspace and Rumin.