Yes, both MindMeister and Nuclino offer a Free Trial.
MindMeister is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Nuclino is designed for Large Enterprises, Medium Business and Small Business.
Pricing for MindMeister Starts at $4.99/Month whereas for Nuclino Starts at $5/User/Month when Billed Yearly.
Some top alternatives to MindMeister includes Mindomo, Zen Mind Map, MindManager, MindGenius, MindMup, NovaMind, SimpleMind, WiseMapping, MindMaster and iMindQ.
Some top alternatives to Nuclino includes ClickUp, Trello, Confluence, CollaborateCloud, Airtable, Microsoft SharePoint, Collabee, Slab, Notion, Slite and Witeboard.