The best AI book writing software for a novel keeps your story straight across a long manuscript. It needs to know who your characters are, what they already know and how your sentences sound. That job is harder than producing one good paragraph, and it is where tools built for fiction pull away from general chatbots.
I compared the tools novelists ask about most: Sudowrite, NovelAI, Novelcrafter, ChatGPT, Claude and Gemini, Scrivener, and Bookh. Each one was judged by what its maker says it is designed to do, how it handles story memory, and where it fits on the path from idea to finished draft. Bookh is our product, so I have held it to a stricter standard than the others. I also say plainly where a competitor is the better choice.
Prices and plan details change often. Where I quote a figure, the provider’s page is linked in the same sentence. Check that page before you subscribe.
The best AI book writing software at a glance
The table summarises each tool by what it is built for. Prices are left out on purpose because they change. The tool sections below link to each provider where a verified figure is available.
| Tool | Best for | Approach | Notable strengths | Limitations |
|---|---|---|---|---|
| Sudowrite | Novelists who want fiction-specific drafting, brainstorming and rewriting | Dedicated fiction AI app on credit-based plans | Built for fiction; core writing features on every tier | Credits deplete as you generate, so heavy drafting may need a higher tier |
| NovelAI | Writers who want open-ended story generation with a sandbox feel | Story generation with memory and lorebook entries, on flat monthly tiers | Unlimited text generation on paid tiers; image generation available | Tiers are gated by context memory; less structured book planning |
| Novelcrafter | Planners who want to choose their own AI model | Planning and writing workspace with a story codex; you connect AI providers | Fine control over context and model choice | More setup; total cost depends on the AI provider you connect (check the provider’s site) |
| ChatGPT, Claude, Gemini | Writers who already pay for an assistant and want flexible brainstorming | General-purpose chat assistants | Versatile; strong at brainstorming, critique and research | No manuscript structure; you carry story context between sessions |
| Scrivener | Long, research-heavy projects; writers who do not want generative AI | Desktop drafting and organising software with a one-time licence | Binder, corkboard and compile; perpetual licence | Not designed as an AI generator; noticeable learning curve |
| Bookh | Writers who want one path from a one-line idea to outline, draft and export | AI writing co-pilot with story memory and a voice profile | Spark-to-outline flow, Lore Vault, Voice & Style, broad export options | Opinionated, guided workflow; not a free-form sandbox, and model choice is not the focus |
What actually separates these tools
Most AI tools can write a competent scene on request. The differences show up around the middle of a draft, when the model has to remember things and your style has to survive.
Story memory
Every model works within a limited context, so long books need a way to recall characters, places and earlier events. Fiction tools handle this with structured stores: Sudowrite’s story planning tools, NovelAI’s lorebook, Novelcrafter’s codex and Bookh’s Lore Vault. General chat assistants leave this to you.
Voice
The most common complaint from novelists is that AI prose sounds like everyone else’s. Tools differ in how they learn your style, from manual style notes to analysing your existing chapters. If this is your main worry, read our guide on keeping your own voice when you draft with AI.
Workflow coverage
Some tools focus on generating prose. Others cover planning, drafting, revision and export. Neither approach is wrong, but a narrow tool means more copying and pasting between apps.
Pricing model
The three models are credits that run down as you generate, flat tiers with unlimited generation, and one-time licences. How much you draft with AI should decide which suits you.
Sudowrite
Sudowrite presents itself as an AI writing tool made specifically for fiction. It offers tools for drafting, brainstorming, describing and rewriting, plus story planning features for tracking characters and worldbuilding. It is the tool most people mean when they ask for an AI built for novelists rather than a general assistant.
Who it suits: working novelists who want many fiction-specific AI moves in one place, especially for revision and for getting unstuck mid-scene.
Pricing model: Sudowrite’s Hobby & Student plan is listed at $19 a month on monthly billing, and its tiers differ by monthly credit limits rather than by features (Sudowrite). This is fair if you use AI in bursts. If you generate long passages daily, watch how quickly credits deplete.
Limitations: the credit system rewards selective use over constant generation. Like any AI drafting tool, its output still needs a firm editorial hand to sound like you.
NovelAI
NovelAI is built around story generation. You write, the model continues, and you steer with memory, author’s notes and lorebook entries. It also includes image generation. Many users treat it as a creative sandbox as much as a drafting tool.
Who it suits: writers who like to discover the story by co-writing with the model, writers of interactive or serial fiction, and anyone who dislikes metered credits.
Pricing model: NovelAI’s entry Tablet tier is listed at $10 a month with an 8,192-token context window, and paid tiers include unlimited text generation (NovelAI). Its top Opus tier raises the context window to 28,672 tokens, and NovelAI says it bills month to month with no yearly plans (NovelAI).
Limitations: because tiers are gated by memory size, how much of your story the model can see depends on your plan. Planning tools are lighter than in workspace-style apps, so outlining a complex novel takes more manual structure.
Sudowrite vs NovelAI: which suits your book?
The Sudowrite vs NovelAI question comes up constantly, and the honest answer is that they solve different problems. Sudowrite is a toolkit. You draft your book and call on specific AI functions to expand, rewrite, describe or brainstorm. NovelAI is a collaborator. You write alongside a model that continues your text, and you shape it through memory and lore entries.
- Choose Sudowrite if you already know your story and want targeted help with prose, revision and scene problems.
- Choose NovelAI if you enjoy exploratory writing, want unlimited generation on a flat monthly fee, and are comfortable building your own structure.
- Consider neither as your only tool if you need a full pipeline from premise and outline through formatted export. Both focus on the writing stage itself.
On cost, the difference is structural. Sudowrite meters generation with credits, while NovelAI meters memory. Heavy generators often prefer NovelAI’s model, and selective users often find Sudowrite’s credits go further than expected.
Novelcrafter
Novelcrafter is a planning and writing workspace. It centres on a codex for characters, locations and lore, and on a structured outline of acts, chapters and scenes. Its distinguishing choice is that you connect the AI provider yourself, so you decide which model writes with you.
Who it suits: technically comfortable planners who want control over context and models, and who like to see exactly what the AI is being told.
Limitations: more setup than an all-in-one tool. Your total cost depends on the subscription plus whatever your AI provider charges, so check both sites for current pricing. If choosing your own model matters most to you, Novelcrafter is a better fit than Bookh.
ChatGPT, Claude and Gemini
General-purpose assistants are good at fiction tasks in isolation: brainstorming premises, critiquing a chapter, suggesting a twist, or researching how a historical detail worked. Many novelists already pay for one, so it is reasonable to ask whether you need anything else.
Who they suit: writers who mainly want a sounding board, critique partner or research aide, and who draft the prose themselves.
Limitations: none of them is designed as a manuscript environment. You need to re-supply character sheets, outlines and style notes, keep chapters organised elsewhere, and watch for drift as conversations grow. For a short story this is manageable. Across a full novel or series, the overhead is the main reason writers move to a dedicated tool.
Scrivener
Scrivener, from Literature & Latte, is the long-standing standard for organising a large writing project. Its binder, corkboard and outliner views let you rearrange scenes and keep research beside the draft. Its compile feature turns the manuscript into submission or publishing formats. It is designed as a writing and organising tool, not an AI generator.
Who it suits: writers with long, research-heavy projects, writers who prefer desktop software, and anyone who does not want generative AI in their drafting space.
Pricing model: Scrivener is sold as a one-time purchase per platform, with a standard macOS or Windows licence listed at $59.99 (Literature & Latte). If you resent subscriptions, this alone may decide it.
Limitations: a real learning curve. For AI help you would pair it with a separate assistant and move text between the two.
Bookh
Bookh is an AI writing co-pilot for fiction, memoir and screenplay authors, and it is free to start with no credit card. Its focus is the whole path rather than one stage. You enter a one-line spark, choose from AI-suggested premises, get a back-cover synopsis, and then receive a chapter-by-chapter outline with scene beats. Length presets cover a short story, novella, novel or series. Our guide to outlining a novel with an AI co-pilot from one line walks through that flow.
Drafting happens in a distraction-free manuscript editor. It has a Mentor chat that knows your book, inline copilot suggestions, a selection toolbar and slash commands. For story memory, the Lore Vault auto-detects characters, places, items and events from your chapters and seeds the cast you enter during setup. A relationship graph and the Plot-Beat Canvas help with structure. Voice & Style analyses your manuscript and sets a voice profile covering maturity and tone, so AI drafts lean towards your style.
Writing Lab drafts next paragraphs. Finish Chapter continues a chapter in your voice, tense and point of view. An Originality check helps prose read like you rather than like AI. Also included are an Image Generator for covers and scenes, Dictation, Read Aloud, a Pomodoro timer, version history, find and replace, and focus mode. Export covers a book-formatted preview, HTML, PDF, EPUB, DOCX and standard manuscript format. The interface is available in English, Italian, Portuguese, German, Spanish and Korean.
Who it suits: writers who want planning, drafting, story memory and export in one place, especially those starting from an idea rather than a finished outline.
Limitations: Bookh is a guided workflow. If you want an open-ended co-writing sandbox, NovelAI fits better. If you want to choose your own model, Novelcrafter is designed for that. If you want no generative AI at all, Scrivener is the better choice.
Authorship and copyright: what the tools can’t decide for you
Whichever tool you choose, the legal question sits with you. The U.S. Copyright Office’s guidance on copyrightability says human authorship is required for protection, and that works generated entirely by AI cannot be copyrighted (U.S. Copyright Office). Rules in the UK, Canada, Australia and Ireland are not identical. Treat this as context rather than legal advice. The practical takeaway is the same everywhere: use AI to assist your choices, not to replace them, and keep version history that shows your own creative work.
Which is the best AI book writing software for you?
Match the tool to the job you actually need done:
- You know your story and want sharper prose: Sudowrite.
- You want to discover the story by co-writing, with unlimited generation: NovelAI.
- You want maximum control over models and context: Novelcrafter.
- You mainly want a brainstorming and critique partner: ChatGPT, Claude or Gemini.
- You want a powerful organiser with no generative AI and no subscription: Scrivener.
- You want one workflow from idea to outline to draft to export, with story memory and a voice profile: Bookh.
Many novelists combine tools, for example Scrivener for organising and an assistant for critique. That works well. The best AI book writing software is often the one that removes the most switching between apps for your process.
How we compared
We assessed each tool on story memory, voice handling, workflow coverage from idea to export, pricing model and fit for different writing styles. Feature descriptions are based on what each maker documents publicly, and every price quoted links to the provider’s own page in the same sentence. We did not run benchmark tests or invent ratings, and plan details may have changed since publication. Bookh is our product, so we have listed its limitations alongside the others’. For a broader roundup, see our honest comparison of AI writing tools for novelists.
Try the full idea-to-manuscript workflow. Bookh takes you from a one-line spark to premises, synopsis and a scene-by-scene outline, then into an editor that remembers your cast and learns your voice. It is free to start, with no credit card.
Frequently asked questions
What is the best AI book writing software for novelists?
It depends on your process. Sudowrite suits fiction-specific drafting and rewriting, NovelAI suits open-ended co-writing with unlimited generation on paid tiers, Novelcrafter suits writers who want to choose their own model, Scrivener suits organising without generative AI, and Bookh suits writers who want one workflow from idea through outline, drafting and export.
Sudowrite vs NovelAI: which is better for writing a novel?
Sudowrite works like a toolkit of fiction-specific AI functions you apply to your own draft, and it uses credit-based plans. NovelAI works like a co-writer that continues your text, with unlimited generation on paid tiers gated by memory size. Choose Sudowrite for targeted help on a story you already know, and NovelAI for exploratory writing.
Is ChatGPT or Claude enough to write a book?
They can be enough for brainstorming, critique and research, especially for shorter projects. They are not manuscript environments, so across a full novel you have to keep re-supplying character notes, outlines and style guidance and organise chapters elsewhere. That overhead is why many novelists move to a dedicated tool.
Does Scrivener write for you with AI?
Scrivener is designed as a drafting and organising tool, not an AI generator. Writers who want AI help usually pair it with a separate assistant. Check Literature and Latte’s site for its current features.
Can I copyright a novel written with AI tools?
U.S. Copyright Office guidance says human authorship is required and works generated entirely by AI cannot be copyrighted. Using AI as an assistant while making the creative choices yourself is the safer approach. Rules vary by country, so seek legal advice for your situation.
Is Bookh free to try?
Yes. Bookh is free to start and does not require a credit card. You can begin at app.bookh.io with a one-line idea and move through premises, synopsis and outline into the manuscript editor.
