Spellbook vs AIWriteBook
Plans, free access, limits and intended use side by side, taken from each vendor’s own pages. No score and no winner: the facts show where the two differ.
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AI contract review, redlining and drafting inside Microsoft Word, priced per seat by quote
Plan, write, edit, format and publish a book with AI, with a cover and audiobook on higher plans
- Free access
- Spellbook: Free trial only
- AIWriteBook: Free access
- Paid from
- Spellbook: No fixed price listed
- AIWriteBook: USD 20 per month
- Plans listed
- Spellbook: 4
- AIWriteBook: 5
- Public API
- Spellbook: Not confirmed
- AIWriteBook: Not confirmed
Where Spellbook and AIWriteBook differ
- AccessSpellbook offers a free trial only, while AIWriteBook offers free access.
- Pricing checkPrices not confirmed for Spellbook; prices confirmed for AIWriteBook.
- PlansSpellbook lists 4 plans and AIWriteBook lists 5.
Head to head
Each value from the tool’s profile and the vendor’s own pages
| Spellbook | Fact | AIWriteBook |
|---|---|---|
| Access and price | ||
| Free trial only | Free accessDiffers | Free access availableFree · USD 0 |
| No fixed price listed | Lowest listed paid plan | USD 20 per monthPlus · or $12 per month billed yearly · $144 a year |
| No public prices; per-seat quote, 7-day free trial | Pricing model | Free plan (100 credits); paid from $12 a month billed yearly |
| 4 | Plans listedDiffers | 5 |
| Not confirmed | Public API | Not confirmed |
| Not confirmed | Card to start | Not confirmed |
| Not confirmed | Open source | Not confirmed |
| What it is for | ||
| Transactional lawyers and in-house legal teams who review and draft contracts in Word | Built for | Self-publishing authors, ghostwriters and non-fiction writers who want one place to outline, draft in their own style, edit and prepare a book for Amazon KDP |
| Writing & content | CategorySame | Writing & content |
| Platforms |
|
| Works with |
|
| How current | ||
| Profile sources checked | ||
| Prices not confirmed · Oct 17, 2026 | Pricing checkDiffers | Prices confirmed · Oct 17, 2026 |
Official source check for both tools. No hands-on testing and no score: “Differs” marks a documented difference, not a better tool.
Plans and prices
Spellbook
Prices not confirmed · Oct 17, 2026- Law firmsNot published; per-seat quote
- In-house teamsNot published; per-seat quote
- Free trialUSD 0 for 7 days
- AcademicFree until the end of 2026
AIWriteBook
Prices confirmed · Oct 17, 2026- FreeUSD 0
- PlusUSD 20 per monthor $12 per month billed yearly · $144 a year
- ProUSD 50 per monthor $30 per month billed yearly · $360 a year
- UltraUSD 200 per monthor $120 per month billed yearly
- One-time creditsUSD 20 for 250 creditsor $50 for 2,000 credits
Strengths and limits
Spellbook
Strengths
- Works where lawyers already edit: The Review page puts redlines and comments inside Microsoft Word, so there is no separate document upload step.
- Your standards, reused: The Review page says playbooks save how you want a document reviewed, and the pricing page lists a playbook build service for in-house teams.
- Review plus research in one place: The Ask page says the same workflow covers asking what the law requires, citing the source and applying the answer as a redline.
Limits to plan around
- No public prices: The pricing page shows no amounts; it says pricing depends on the number of team members on a licence and sends you to a demo.
- Not legal advice: Terms section 5.4 says the customer will not rely solely on output as formal legal advice and will have it checked by a licensed lawyer when appropriate.
- Spellbook may keep a copy for 90 days: The Terms let Spellbook keep inputs and outputs for quality assurance for up to 90 days, which is separate from the zero retention it requires of its model providers.
AIWriteBook
Strengths
- Free plan with no card: The pricing FAQ says you can plan a full book and get a first chapter free, with no credit card required.
- Content stays yours: The terms say you keep ownership and commercial rights to what you create, and the privacy policy says your content is not used to train its models or by its AI providers.
- Credit costs are published: The terms list per-action credit costs, so you can estimate a book before paying.
Limits to plan around
- Pages disagree on credit expiry: The pricing FAQ says unused subscription credits expire after a month, while the terms say Pro credits roll over for up to 3 months.
- Audiobooks are credit-heavy: At the terms' rate a 2,000-word chapter costs about 880 credits, so a full audiobook can outrun a plan's monthly allowance.
- Refunds are narrow: The terms allow a refund only within 7 days of the first subscription purchase and with under 50% of credits used; renewals and one-time credit packs are non-refundable.
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Comparing tools from different categories is fine, and often useful — a writing assistant and a research tool solve different halves of the same job. The table will show you exactly where they diverge.
Questions about comparing tools
How does the comparison work?
Add two tools to the comparison tray from any tool card, then open this page. The table pulls each tool's verified plan details, platforms, strengths and limits from its profile, so both columns carry the same kind of evidence, with a separate source-check date for each tool.
Do you declare a winner?
No. The table sets two tools against each other on documented facts, not on a score. Which one wins depends on your task, your budget and your usage volume — three things we cannot see from here.
Why are some cells empty or marked unverified?
Because we could not confirm that detail on the vendor's own pages. Rather than filling the gap with a figure from elsewhere, we mark it and say why on the tool's profile.
Can I compare more than two tools?
Not at once. Two columns keep the differences readable and force a real decision. Remove either selected tool to replace it, or clear both to start a new pair.
Every figure in the table above comes from the linked profile, where the source and the verification date are listed. Browse all tools or read the editorial policy.