Quick Overview
- 1#1: Sudowrite - AI writing companion that generates plot ideas, characters, descriptions, and rewrites for fiction novels.
- 2#2: NovelAI - AI-powered storytelling tool specialized in generating interactive stories, novels, and lore with customizable styles.
- 3#3: Squibler - AI book generator that creates full outlines, chapters, and manuscripts from simple prompts or ideas.
- 4#4: Jasper - AI content platform with long-form assistant for generating non-fiction books, outlines, and chapters efficiently.
- 5#5: Claude - Advanced AI model excels at coherent long-form writing, book structuring, and creative editing.
- 6#6: ChatGPT - Versatile conversational AI for brainstorming book ideas, drafting chapters, and iterative writing refinement.
- 7#7: Writesonic - AI writing tool with long-form generator optimized for books, articles, and structured content creation.
- 8#8: Copy.ai - AI copywriting platform with workflows for generating book sections, outlines, and marketing blurbs.
- 9#9: Rytr - Affordable AI assistant for quick book content generation, outlines, and editing across genres.
- 10#10: Grammarly - AI-enhanced editor with generative features for polishing book drafts, improving style, and suggesting rewrites.
Tools were evaluated and ranked based on key factors including feature portfolio (plot/character generation, structuring, editing), output quality (coherence, creativity, adaptability), ease of use (interface, workflow integration), and overall value (pricing, scalability for authors of all levels).
Comparison Table
AI book writing software is reshaping creative processes, and comparing tools like Sudowrite, NovelAI, Squibler, Jasper, Claude, and more helps authors find the right fit for their goals, style, and budget. This table outlines key features, usability, and practical applications, guiding readers to identify platforms that streamline drafting, enhance prose, or simplify their writing journey.
| # | Tool | Category | Overall | Features | Ease of Use | Value |
|---|---|---|---|---|---|---|
| 1 | Sudowrite AI writing companion that generates plot ideas, characters, descriptions, and rewrites for fiction novels. | specialized | 9.5/10 | 9.8/10 | 9.3/10 | 8.9/10 |
| 2 | NovelAI AI-powered storytelling tool specialized in generating interactive stories, novels, and lore with customizable styles. | specialized | 9.2/10 | 9.5/10 | 8.0/10 | 9.0/10 |
| 3 | Squibler AI book generator that creates full outlines, chapters, and manuscripts from simple prompts or ideas. | specialized | 8.6/10 | 9.0/10 | 8.8/10 | 8.2/10 |
| 4 | Jasper AI content platform with long-form assistant for generating non-fiction books, outlines, and chapters efficiently. | general_ai | 7.6/10 | 7.4/10 | 9.1/10 | 6.9/10 |
| 5 | Claude Advanced AI model excels at coherent long-form writing, book structuring, and creative editing. | general_ai | 8.2/10 | 7.8/10 | 9.2/10 | 8.5/10 |
| 6 | ChatGPT Versatile conversational AI for brainstorming book ideas, drafting chapters, and iterative writing refinement. | general_ai | 7.3/10 | 6.7/10 | 9.4/10 | 8.2/10 |
| 7 | Writesonic AI writing tool with long-form generator optimized for books, articles, and structured content creation. | general_ai | 7.2/10 | 7.0/10 | 8.5/10 | 7.1/10 |
| 8 | Copy.ai AI copywriting platform with workflows for generating book sections, outlines, and marketing blurbs. | general_ai | 6.2/10 | 5.8/10 | 8.7/10 | 6.5/10 |
| 9 | Rytr Affordable AI assistant for quick book content generation, outlines, and editing across genres. | general_ai | 6.8/10 | 6.2/10 | 8.7/10 | 8.0/10 |
| 10 | Grammarly AI-enhanced editor with generative features for polishing book drafts, improving style, and suggesting rewrites. | creative_suite | 6.8/10 | 6.2/10 | 9.4/10 | 7.1/10 |
AI writing companion that generates plot ideas, characters, descriptions, and rewrites for fiction novels.
AI-powered storytelling tool specialized in generating interactive stories, novels, and lore with customizable styles.
AI book generator that creates full outlines, chapters, and manuscripts from simple prompts or ideas.
AI content platform with long-form assistant for generating non-fiction books, outlines, and chapters efficiently.
Advanced AI model excels at coherent long-form writing, book structuring, and creative editing.
Versatile conversational AI for brainstorming book ideas, drafting chapters, and iterative writing refinement.
AI writing tool with long-form generator optimized for books, articles, and structured content creation.
AI copywriting platform with workflows for generating book sections, outlines, and marketing blurbs.
Affordable AI assistant for quick book content generation, outlines, and editing across genres.
AI-enhanced editor with generative features for polishing book drafts, improving style, and suggesting rewrites.
Sudowrite
specializedAI writing companion that generates plot ideas, characters, descriptions, and rewrites for fiction novels.
Canvas: an infinite visual workspace for mind-mapping plots, characters, and world-building.
Sudowrite is an AI-powered writing tool tailored for fiction authors, helping users generate story ideas, expand scenes, enhance descriptions, and brainstorm characters and plots. It features specialized modes like Write, Describe, Brainstorm, and Canvas for visual planning, making it ideal for overcoming writer's block and refining manuscripts. The platform integrates seamlessly into the writing process, offering style-matching and rewriting capabilities to elevate prose quality.
Pros
- Exceptional fiction-specific tools like Canvas for visual plotting and Brainstorm for ideas
- High-quality, context-aware prose generation that understands narrative arcs
- Intuitive interface that integrates directly into writing workflows
Cons
- Primarily optimized for fiction, less effective for non-fiction or technical writing
- Word/credit limits on lower tiers can restrict heavy users
- Subscription model may feel expensive for casual writers
Best For
Fiction authors and novelists who want AI to boost creativity, planning, and editing without replacing their voice.
Pricing
Plans start at $19/month (Hobby, 225K words/year) up to $99/month (Max, unlimited words).
NovelAI
specializedAI-powered storytelling tool specialized in generating interactive stories, novels, and lore with customizable styles.
Lorebook system that dynamically injects detailed world, character, and plot information into AI generations for superior narrative consistency
NovelAI is an AI-powered platform specializing in creative writing assistance for novels, stories, and interactive fiction. It leverages fine-tuned language models to generate high-quality prose, continue narratives, and maintain story consistency through tools like Lorebooks. Users can also create AI-generated images for book covers and illustrations, making it a comprehensive tool for fiction authors.
Pros
- Exceptional text generation quality tailored for fiction with customizable modules
- Lorebook system for consistent world-building and character tracking
- Integrated AI image generation for visuals without leaving the platform
Cons
- Steep learning curve for effective prompt engineering and advanced features
- Subscription-only with limited free trial access
- Output can occasionally be repetitive or require heavy editing for long-form books
Best For
Aspiring novelists and fiction writers who want AI to generate immersive stories, maintain lore consistency, and create accompanying artwork.
Pricing
Subscription tiers: Tablet ($10/mo, 2048 tokens), Scroll ($15/mo, unlimited basic), Opus ($25/mo, premium models); limited free trial available.
Squibler
specializedAI book generator that creates full outlines, chapters, and manuscripts from simple prompts or ideas.
AI Scene Generator that creates detailed, customizable scenes from simple prompts or outlines
Squibler is an AI-powered writing platform tailored for novelists and screenwriters, offering tools to generate outlines, characters, scenes, and full book drafts. It combines AI assistance with project management features like storyboards and progress tracking to streamline the writing process. Users can export content in multiple formats, making it suitable for both fiction and screenplay development.
Pros
- Robust AI tools for generating outlines, characters, and scenes
- Intuitive interface with visual storyboards for organization
- Supports both book and screenplay writing workflows
Cons
- Free plan has significant limitations on AI usage
- AI-generated content often needs substantial editing for quality
- Lacks advanced collaboration features compared to competitors
Best For
Aspiring novelists and screenwriters who want structured AI help to overcome writer's block and organize long-form projects.
Pricing
Free community plan; Pro plan at $10/month (billed annually) or $20/month, with unlimited AI generations.
Jasper
general_aiAI content platform with long-form assistant for generating non-fiction books, outlines, and chapters efficiently.
Everything Mode for interactive, command-driven long-form writing that builds chapters progressively
Jasper.ai is a versatile AI writing assistant designed primarily for marketing copy and content creation, but adaptable for book writing through templates for outlines, chapters, and long-form content. It uses advanced language models to generate drafts quickly, with features like tone adjustment and brand voice training to maintain consistency. While effective for non-fiction and outlines, it excels more in structured content than highly creative fiction narratives.
Pros
- Intuitive interface with book-specific templates for outlines and chapters
- Fast generation of long-form content via Everything Mode
- Brand Voice feature ensures consistent style across manuscripts
Cons
- Outputs can feel generic and repetitive, requiring heavy editing
- Not optimized for complex fiction plotting or character development
- High cost for unlimited usage doesn't fully justify book-length projects
Best For
Non-fiction authors and business writers seeking quick outlines and initial drafts for guides, ebooks, or how-to books.
Pricing
Creator plan at $39/user/month (annual billing) with unlimited words; Pro plan at $59/user/month for advanced team features and integrations.
Claude
general_aiAdvanced AI model excels at coherent long-form writing, book structuring, and creative editing.
Constitutional AI ensuring safe, aligned, and exceptionally helpful creative writing outputs
Claude.ai, powered by Anthropic's advanced AI models, serves as a versatile conversational tool for book writing by generating outlines, chapters, character developments, and edits through natural language prompts. It excels in producing coherent, creative prose and refining drafts iteratively, making it suitable for authors leveraging AI assistance in the writing process. While not a dedicated book authoring platform, its strong reasoning and long-context capabilities support structured long-form content creation.
Pros
- Superior text generation quality with coherent long-form writing
- Large context window (up to 200K tokens) for handling chapters or outlines
- Excellent for brainstorming, editing, and iterative refinements
Cons
- Lacks built-in book project management or collaboration tools
- Free tier has strict usage limits unsuitable for full books
- Requires skilled prompting to maintain consistency over long projects
Best For
Writers who want a flexible, high-quality AI co-pilot for creative prose, outlining, and editing without needing specialized software.
Pricing
Free tier with message limits; Pro at $20/month for priority access and higher limits.
ChatGPT
general_aiVersatile conversational AI for brainstorming book ideas, drafting chapters, and iterative writing refinement.
Conversational prompting for iterative, human-like collaboration on writing refinements
ChatGPT, accessible via chat.openai.com, is a general-purpose AI chatbot powered by large language models that can assist with book writing through prompt-based generation of outlines, chapters, character development, plot ideas, and editing suggestions. It supports iterative writing by allowing users to refine content conversationally, drawing from a vast knowledge base for research and inspiration. However, it lacks specialized book-writing tools like manuscript structuring or publishing exports, making it more of a versatile writing companion than a dedicated platform.
Pros
- Extremely versatile for generating ideas, outlines, and drafts across any genre
- Conversational interface allows real-time editing and refinement
- Free tier provides solid access to core capabilities with no setup required
Cons
- No built-in book organization, chapter tracking, or export features
- prone to hallucinations and inconsistencies in long-form content
- Advanced features and higher limits require paid subscription
Best For
Writers and authors who need quick, flexible brainstorming, drafting, and editing assistance without specialized book-writing software.
Pricing
Free basic access; ChatGPT Plus at $20/month for GPT-4o, priority access, and higher usage limits; Team/Enterprise plans from $25/user/month.
Writesonic
general_aiAI writing tool with long-form generator optimized for books, articles, and structured content creation.
AI Article Writer 6.0 for generating up to 10,000-word chapters from simple prompts
Writesonic is a versatile AI writing platform that excels in generating marketing copy, blog posts, and long-form content, with tools adaptable for book writing such as outlines, chapters, and full drafts via its AI Article Writer and custom prompts. It supports both fiction and non-fiction but shines more in structured, SEO-optimized non-fiction books. Users can iterate on content using its editor and integrate with workflows for efficient drafting.
Pros
- Extensive template library for quick outlines and chapters
- User-friendly interface with real-time editing
- Strong SEO and fact-checking integrations for non-fiction
Cons
- Lacks deep narrative tools for complex fiction plots
- Generations often require significant editing for coherence in long books
- No dedicated book-specific workflow compared to specialized tools
Best For
Non-fiction authors and content creators needing fast drafts and SEO-optimized book sections.
Pricing
Free plan limited; Pro at $16/mo (billed annually), Unlimited at $99/mo for heavy users.
Copy.ai
general_aiAI copywriting platform with workflows for generating book sections, outlines, and marketing blurbs.
Workflows for automating repetitive writing tasks like generating multiple chapter variations
Copy.ai is an AI-powered content generation platform primarily designed for marketing copy, blog posts, and social media, but it can be adapted for book writing through custom prompts and templates. It excels at producing short-form content like chapter outlines, character descriptions, or dialogue snippets quickly. However, it lacks specialized tools for long-form narratives, plot development, or maintaining consistency across an entire book.
Pros
- Intuitive interface with prompt-based generation for quick ideation
- Wide range of templates adaptable for outlines and scenes
- Brand voice feature helps maintain consistent tone across chapters
Cons
- Struggles with long-context retention for full manuscripts
- Limited book-specific tools like plot builders or character arcs
- Output often requires significant editing for novel-quality prose
Best For
Freelance writers or marketers needing fast drafts for non-fiction books or outlines rather than full fiction novels.
Pricing
Free plan with limited credits; Pro at $49/month for unlimited generations; Enterprise custom pricing.
Rytr
general_aiAffordable AI assistant for quick book content generation, outlines, and editing across genres.
Extensive library of 40+ use-case templates that can be repurposed for book writing components like chapters and synopses
Rytr is a versatile AI writing assistant that generates high-quality text for various use cases, including blog posts, emails, social media, and basic book elements like outlines, chapters, and descriptions through customizable prompts. While not a dedicated book writing platform, it supports iterative content creation with features like 'Continue Ryting' for longer passages and tone matching. It's accessible via web, app, and browser extension, making it suitable for quick drafting but less ideal for complex novel structures.
Pros
- Affordable pricing with a generous free tier
- Intuitive interface and fast generation speeds
- 40+ templates adaptable for book outlines and sections
Cons
- Limited context retention for long-form books leading to inconsistencies
- Lacks specialized tools like plot builders or character trackers
- Outputs often require significant editing for book-quality prose
Best For
Budget-conscious writers or non-fiction authors needing quick drafts, outlines, and short chapters.
Pricing
Free plan (10k chars/mo); Saver $9/mo (100k chars); Unlimited $29/mo (unlimited chars).
Grammarly
creative_suiteAI-enhanced editor with generative features for polishing book drafts, improving style, and suggesting rewrites.
AI-powered rewriting and generative suggestions that instantly improve sentence clarity, tone, and engagement in book drafts
Grammarly is an AI-powered writing assistant renowned for grammar checking, style suggestions, punctuation, and clarity improvements across various writing tasks. For AI book writing, it supports editing and polishing long-form manuscripts with real-time feedback, tone detection, and recent generative features like text rewriting and idea generation via GrammarlyGO. However, it lacks specialized tools for book outlining, character development, or full chapter generation, positioning it more as an enhancement tool than a comprehensive book creation platform.
Pros
- Exceptional real-time grammar, spelling, and style corrections
- Seamless integration with Google Docs, Word, and browsers for manuscript editing
- Generative AI features like rewriting and brainstorming for refining book content
Cons
- No dedicated book structuring, outlining, or plot generation tools
- Generative capabilities limited compared to specialized AI book writers
- Advanced features locked behind Premium subscription for long-form use
Best For
Writers and authors who have existing drafts or outlines and need AI-assisted editing and polishing for professional-quality books.
Pricing
Free basic plan; Premium at $12/month or $144/year; Pro plan at $30/month with more generative AI; Enterprise custom pricing.
Conclusion
The reviewed AI book writing tools showcase diverse strengths, with Sudowrite leading as the top choice for its robust support in crafting complete fiction novels. NovelAI and Squibler, ranking second and third, excel for different needs—NovelAI’s interactive storytelling and Squibler’s all-in-one outlining, making them strong alternatives. Together, these tools transform the writing process, offering solutions tailored to various genres and workflows.
Take the first step toward your next masterpiece: explore Sudowrite to unlock its full potential for seamless, creative writing.
Tools Reviewed
All tools were independently evaluated for this comparison