Interior AI is a good option, with a wide range of features including Virtual Staging AI, 3D Flythroughs, Multiple Design Modes and Sketch Conversion. You can upload a photo of what you already have, then select from more than 50 styles, and get photorealistic views in seconds. It's easy to use, and you can try it for two months for free if you sign up for an annual subscription.
Another option is Room AI, which lets you create pro-looking designs without having to download or install anything. With 40+ styles like Cyberpunk and Minimalist, you can rephotograph your room photos the way you like them with Restyle, or create entirely new rooms with photorealistic views. Room AI is designed to be easy to use, and it has a range of pricing options depending on how much you need.
Genera is a platform geared specifically for architectural and interior design. You can upload a photo of a room, select a style, and get a new version created with AI. Genera has more than 30 styles, and you can add your own, too, so it's a good way to explore different options. The platform also offers curated shopping lists for the new space, which can be useful for figuring out what to buy for your home.