Do professionals use blender?

Yes, professionals use Blender for various purposes, such as creating 3D models, animations, visual effects, games, and more. Blender is a powerful and versatile software that can handle complex projects and workflows. Blender is also free and open source, which means anyone can use it, modify it, and contribute to it. Some examples of professional projects that use Blender are: The Spider-Verse movie by Sony Pictures Animation The Next-Gen game by Ubisoft The Spring Open movie by Blender Studio

Yes , because this software is free of cost and offer almost all tools for 3d artists

Yes, though it's mostly used by freelancers and small studios as other proprietary tools dominate the space due to their corporate backing and are thus "industry standard".