What are some alternatives?
When comparing Witeboard and Invision, you can also consider the following products
Jamboard - Interactive Business Whiteboard | G Suite
Proto.io - Create fully-interactive high-fidelity prototypes in minutes that look and work exactly like your app should. Sign up for a free 15-day trial and get started.
RealtimeBoard - RealtimeBoard is an online collaboration software created as a team collaboration and online brainstorming tool. It's super easy to use & free!
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
Zeplin - Collaboration app for UI designers & frontend developers