Riff is a web-based application that allows users to create visual prompts for AI image generation models like DALL-E 2 and Stable Diffusion. Users can draw, doodle, or upload images to create the initial visual prompt, and then add text descriptions to guide the AI model towards the desired output image.
Riff itself is a free web-based application. However, users need to have a subscription or access to the supported AI image generation models, such as DALL-E 2 or Stable Diffusion, which typically require paid subscriptions or credits.