If you want to turn an existing logo into a 3D illustration, Logo Diffusion is a great option. The AI system can redesign logos, including turning 2D logos into 3D illustrations, with text prompts. It comes with useful features like turning generated logos into clean vector files and removing backgrounds, so it's a good all-purpose option for your needs.
Another option is 3D AI Studio, which can turn text or images into high-quality 3D assets. It has a lot of features, including 3D model generation and texture generation, but it's designed to be easy to use, so you don't need to be a modeling expert.
For a more general-purpose toolkit, check out Meshy. It can handle text-to-3D and image-to-3D conversions, and it's got features like AI texturing and fast export options. Meshy is good for AR/VR, gaming and digital design work, with a variety of art styles and export options to match your creative style.
Last, 3DFY.ai is a powerful option for turning text prompts or single images into high-quality 3D models. It's got features like quad-meshed topology, high-quality UV maps and physically-based rendering materials, so it's good for a variety of industries, including gaming, AR/VR and online sales.