What are some alternatives?
When comparing Marketch and Phase, you can also consider the following products
Relay for Figma - No more slice & export! Relay allows you to push changes from Figma straight to your codebase
Invision - Prototyping and collaboration for design teams
Zeplin - Collaboration app for UI designers & frontend developers
STUDIO - Next generation design tools for digital products.
Frontify Workspace - The overall tool for creative & design collaboration: - upload, manage & share assets
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.