For a broad span of artistic styles and periods, OpenArt is a great option. It offers boundaryless AI drawing, sophisticated AI art tools, and a curated selection of genres and periods. You can build your own styles and models, and even train your own model to meet your particular creative needs. With a range of pricing levels to accommodate different budgets, it's a complete system for creating, editing and refining your art.
Another top contender is DreamStudio, which offers AI tools to create art, photos and illustrations. It includes early access to the latest StableDiffusion models, multi-generation exploration, instant style transfer and a flexible canvas with heavy-duty editing abilities. That makes it a good option for creators who want to work faster and explore new avenues of image generation.
For those who like a community-based approach, Civitai is a good option. It has an enormous library of high-quality Stable Diffusion models and a curated selection of models you can filter by your preferences. The site also has tutorials, tips and community posts to help you improve your generative AI skills, so it's a good place to learn and improve.
Last, starryai has an easy-to-use interface and a big library of more than 1000 styles. You can generate up to 25 images per day for free, and you can customize images and reimage existing ones. The app is good for casual users and pros who want to try out AI art or who want to incorporate it into their creative workflow.