What options are there for creating VATs to be used in UE?

Hello!

I’m currently planning the pipeline for a project, and I am fairly certain that VATs will be needed to create certain assets for the game.
I have used Houdini to output Vertex Animation Textures (VATs), but that software is rather beyond the budget, which led me to wonder:

What software can a person use to make VATs? Is it exclusive to Houdini? What options are out there?