What is the best wireframing tool for prototyping and brainstorm UI ideas in Salesforce?
MockFlow seems to be a strong candidate.
It is a free tool with a library of SLDS/Lightning components. Create an account and add the "Salesforce LDS2" UI Pack to get started quickly.
This should let you iterate with users with little time adjusting screen components.
🔗 Check it out: https://mockflow.com

