Part of the AI writing assistant guide
QuillBot rewrites your sentences. AIWriteBook helps you finish the book
QuillBot is a paraphrasing and grammar toolkit: paste a passage, pick a mode, get a smoother or different version. AIWriteBook does the job around that: plan the book, draft each chapter in your voice, then edit, format and publish it. If you are looking for a QuillBot alternative for a novel or a non-fiction book, start by asking which of those two jobs you actually have.
Two tools, two different jobs
QuillBot starts from text you already have. AIWriteBook starts from a book you want to exist. Almost every difference on this page follows from that one.
QuillBot's job
Make this passage read better
- Paraphrases a sentence or paragraph in modes such as Standard, Fluency, Formal and Creative
- Checks grammar, spelling and punctuation
- Summarizes, translates, and checks text for plagiarism and AI writing
- Runs on the web, in a browser extension and inside Word
What you walk away withA cleaner version of the text you pasted in
AIWriteBook's job
Get a whole book written, edited and published
- Builds an editable outline, chapter plan and cast from your idea
- Drafts each chapter from that plan and a sample of your own writing
- Edits through an AI chat that shows every change as a diff you accept or reject
- Formats print PDF, EPUB and DOCX, designs the cover and prepares the KDP listing
What you walk away withA finished manuscript with files a store will accept
Use both together: where QuillBot fits in a book project
Plenty of authors keep QuillBot open while they write. This is how the two split a real project, stage by stage, so neither tool is asked to do a job it was not built for.
- PlanAIWriteBook
Outline the book and its cast
Describe the premise and AIWriteBook proposes a chapter-by-chapter outline and characters, which you edit before any prose exists. Want to see a skeleton first? Our outline generator sketches one from a single idea. QuillBot has no planning step, because it never sees the book as a whole.
- DraftAIWriteBook
Write chapters that remember chapter one
Each chapter is generated from the outline, its own chapter notes, the character list and the Story Bible, in the voice of the writing sample you pasted. A paraphraser works on a few paragraphs at a time and has no idea what happened three chapters ago.
- PolishEither tool
Rework the sentences that feel off
This is QuillBot's home ground: paste a stiff paragraph, try Fluency or Creative, keep the version you like. Inside AIWriteBook the same job happens in the chapter AI chat, where you ask for the rewrite and accept or reject each change in place, so the chapter never leaves the manuscript. If you like the paste-and-compare style, there is also a book-aware paraphrasing tool with three versions per run.
- CheckEither tool
Catch grammar slips and typos
Both tools flag grammar, spelling and punctuation. AIWriteBook's grammar and style check reads the whole chapter with no word cap and gives a one-line reason for every fix, so you can tell a real error from a matter of taste.
- PublishAIWriteBook
Format, cover and list the book
Build the print PDF, EPUB, wrap cover and DOCX, then fill the KDP listing with generated keywords and a book description. Our guide to formatting a book for KDP explains the trim sizes and margins this step takes care of.
One habit worth keeping, whichever tools you use: paraphrase a passage only when it reads badly, never page after page. Rewording clean prose sentence by sentence sands the voice off a manuscript, and readers notice the flattening long before they notice a comma. If a chapter already sounds generic, the AI text humanizer is the better fix than another paraphrase.
What each one costs
QuillBot charges for unlimited paraphrasing. AIWriteBook charges for the work of producing a book, and lets you start without paying anything.
QuillBot
- Free plan: paraphrase up to 125 words at a time, in Standard and Fluency modes
- Premium: $19.95 a month, or $99.95 a year
- Premium removes the word limit, opens every mode and adds the plagiarism checker
AIWriteBook
- Free: plan the book and write your first chapter
- Plans from $12 a month, billed yearly
- Or one-time credit packs from $20 for 250 credits, with no subscription
- Drafting, editing, formatting, covers and audiobooks in one account
QuillBot prices are its published Premium rates as of October 2026.
Where QuillBot is the better pick
- Rewording one sentence or paragraph several ways and comparing the versions side by side.
- School and work writing: summaries, citations and plagiarism checks for essays and reports.
- Fixing text wherever you type, through its browser extension and Word add-in.
- A low yearly price when paraphrasing and grammar are all you need.
Who should stay with QuillBot
Students, researchers and anyone polishing emails, essays or articles. If no book is on the way, QuillBot covers the job and AIWriteBook would be more tool than you need.
QuillBot or AIWriteBook: questions authors ask
Is QuillBot good for writing a book?
It is good for polishing parts of one. QuillBot rewrites, checks and summarizes the text you give it, a passage at a time. It does not plan chapters, keep characters consistent across a manuscript or produce print and ebook files, so the book itself has to come from somewhere else.
Is AIWriteBook a good QuillBot alternative for authors?
For books, yes. It covers what an author uses QuillBot for, rewording through the chapter chat and a grammar and style check, and adds what QuillBot does not do: outlining, drafting chapters in your voice, formatting, covers and publishing files. For essays and work email, QuillBot stays the better fit.
Will paraphrasing make my book sound like AI?
It can, if every page goes through it. Paraphrasers pull prose toward a smooth average. Use them on the sentences that genuinely trip you up and leave the rest alone. In AIWriteBook, chapters are written from your own writing sample and every AI edit is a visible change you can reject.
Can I bring a manuscript I already polished in QuillBot?
Yes. Save it as a .docx file and import it, up to 200,000 words. Your text is kept exactly as written, and AIWriteBook learns your style from it so new chapters match.
How do the prices compare?
QuillBot Premium costs $19.95 a month or $99.95 a year, after a free plan that paraphrases 125 words at a time. AIWriteBook is free to start with your outline and first chapter, plans begin at $12 a month billed yearly, and one-time packs start at $20.
Can I use QuillBot and AIWriteBook together?
Yes, and plenty of authors do. Write and assemble the book in AIWriteBook, and keep QuillBot for the odd paragraph you want to see reworded five ways, or for the emails and articles around your launch.
Keep reading
- The AI writing assistant guideEvery kind of AI writing tool for authors, sorted by the job it does.
- AIWriteBook vs GrammarlyThe other big polishing tool, and where it fits in a manuscript.
- Best AI writing tools for authorsA wider look at the tools worth paying for this year.
- The chapter AI chatAsk for any rewrite and accept or reject each change in the chapter.
Keep QuillBot for sentences. Write the book here
Plan the book and write the first chapter free, then decide what you need.
- Outline and first chapter free
- Import your .docx draft, up to 200,000 words
- Print PDF, EPUB, wrap cover and DOCX from one Generate
- One-time credit packs from $20, no subscription