AIのべりすと (AI Novelist) vs Grammarly

AI Novelist is the largest public Japanese storywriting AI, trained from more than 2TB of corpus data. It lets users write or continue stories from example prompts or their own text, with multiple specialized models and style mods.

Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, and style in real time across browsers, desktop apps, and mobile keyboards. It integrates directly into Gmail, Google Docs, Microsoft Word, Slack, and thousands of other websites via a browser extension. Beyond basic correctness, Grammarly analyzes tone and clarity, suggesting rewrites to make writing more concise, confident, or friendly depending on the context and audience selected by the user. GrammarlyGO adds generative AI features for drafting emails, replying to messages, and rewriting passages on demand, while Grammarly Business adds brand style guides and analytics for teams that need consistent written communication across an organization.

• Multiple specialized models for different writing styles
• Style mods allow genre transformation
• Custom style mod training from user text
• Large Japanese-language training corpus

• Works across almost every app via browser extension
• Good tone and clarity suggestions beyond basic grammar
• GrammarlyGO speeds up drafting
• Free tier is genuinely useful

• Primarily focused on Japanese-language writing
• May require familiarity with Japanese creative writing conventions

• Premium features behind a subscription
• Occasional over-aggressive suggestions
• Privacy concerns for some sensitive writing contexts