If you're seeking a Flatify alternative, Polycam could be worth a look. Polycam is an all-purpose 3D capture and creation tool that lets people create 3D models with their iPhone, iPad, Android phone or web browser. It supports a variety of methods, including LiDAR scanning and photogrammetry, with features like augmented reality views and collaboration tools. It doesn't export directly as a CAD file, but its powerful 3D creation abilities can help you get closer to your goal.
Another option is Gencraft, an AI-based tool that generates 3D models and textures from a single 2D image. That's potentially useful for architecture and product design, where it can automate much of the labor involved in creating detailed 3D models with realistic textures. That can save you a lot of time and give you accurate measurements.