NovelAI

NovelAI is a web-based SaaS for visual-novel writers, manga creators, game masters, RPG creators, and anime fans who want AI-assisted storywriting and anime-style image generation.

Key capabilities include:

• AI-assisted story generation using GPT-based text models (Calliope, Sigurd, Euterpe, Krake, Genji) with memory and theme controls plus a customizable editor for longer narratives.
• Text-to-image synthesis for anime art using NovelAI Diffusion (a custom Stable Diffusion model), supporting both natural-language prompts and Danbooru tag-style prompting.
• Image workflows such as image-to-image, Vibe Transfer for reusing aesthetics, and in-painting to fix mistakes or add details.
• Privacy features including end-to-end encryption for private projects; generated images are not stored on servers.

Pricing: Paid plans include Tablet ($10/mo), Scroll ($15/mo), and Opus ($25/mo), plus pay-as-you-go options. Image generation uses Anlas currency; Opus includes unlimited images within limits.

Notable for its anime-focused diffusion model trained around Danbooru tags, its multi-model writing setup (including Japanese-focused Genji), and its emphasis on user ownership of generated content.