Legal · head to head
Clio vs Spellbook
Spellbook
Legal
Contract drafting and review assistant inside Microsoft Word
- From
- On request
- Rated
- -
The short version
- Each has a real cost: Clio priced per user per month, so cost scales directly with headcount and adds up for growing firms; Spellbook it publishes no accuracy figure for its own output and no independent evaluation exists, so a firm must run its own assessment on real agreements.
- They diverge on capability: Clio covers Matter management, Spellbook covers Word add-in drafting.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Clio and Spellbook actually diverge.
Identical on both: starting price (On request), free tier (No), user rating (Not yet rated), category (Legal).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Clio
- Matter management
- Time and billing
- Trust accounting
- Client intake
- Document management
- Integration directory
Only in Spellbook
- Word add-in drafting
- Contract review
- Benchmarks against market standards
- Question answering
- Named model providers
What people use each for
The jobs each tool is most often brought in to do.
Clio
- Small and mid-sized firms replacing spreadsheets and paper matter filesnot Spellbook
- Firms needing compliant trust accounting without a separate systemnot Spellbook
- Practices billing hourly that lose revenue to uncaptured timenot Spellbook
Spellbook
- Transactional lawyers drafting commercial agreements in Wordnot Clio
- In-house teams reviewing inbound contracts without a contract lifecycle systemnot Clio
- Lawyers who want a first pass at redlines before applying their own judgementnot Clio
- Firms that need to know which model providers process their documents before adopting an AI toolnot Clio
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Clio
- Priced per user per month, so cost scales directly with headcount and adds up for growing firms
- Advanced features including some automation and reporting sit in higher tiers rather than the entry plan
- Aimed at small and mid-sized firms; large firms with complex matter structures often need heavier systems
- Strongest in North America, with less depth in other jurisdictions’ compliance requirements
Spellbook
- It publishes no accuracy figure for its own output and no independent evaluation exists, so a firm must run its own assessment on real agreements.
- The ten times more accurate claim originated in a funding announcement as a statement of intent and has no methodology, dataset or baseline behind it.
- Contract text is processed by third-party model providers, so despite the zero data retention agreements this still needs checking against client confidentiality terms and outside counsel guidelines.
- Pricing is not published, so seat cost cannot be compared against competitors without booking a demo.
- It is a drafting assistant rather than a contract lifecycle system, so it does nothing for execution, obligation tracking or renewals.
Pricing, plan by plan
Clio
On requestNo published plan breakdown. See the Clio review.
Spellbook
On request- Spellbook$undefined/year
- Priced by the number of seats on the licence
- Rates quoted after a demo, not published
- Seven day free trial, free access for academic use
Which should you pick?
Choose Clio if
- You need matter management.
- You work on Web, iOS, Android, Cloud.
- You also want time and billing.
Choose Spellbook if
- You need word add-in drafting.
- You work on Windows, macOS, Web.
- You also want contract review.
Questions people ask
- Is Clio or Spellbook better?
- Neither clearly leads. Clio starts at On request and Spellbook at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Clio or Spellbook?
- Clio starts at On request and Spellbook at On request.
- Does Clio or Spellbook run on more platforms?
- Clio runs on Web, iOS, Android, Cloud. Spellbook runs on Windows, macOS, Web.
- What is Clio best used for?
- Clio is most often used for small and mid-sized firms replacing spreadsheets and paper matter files, firms needing compliant trust accounting without a separate system, practices billing hourly that lose revenue to uncaptured time. Of those, small and mid-sized firms replacing spreadsheets and paper matter files and firms needing compliant trust accounting without a separate system are not what Spellbook is typically brought in for.
- What can Clio do that Spellbook cannot?
- Clio covers Matter management, Time and billing, Trust accounting, Client intake. Spellbook covers Word add-in drafting, Contract review, Benchmarks against market standards, Question answering.
Answered from the vendors’ own pages
Clio: What does Clio cost?
Clio sells per-user subscriptions across several tiers. Rates change and vary by region, so check the vendor’s current pricing page rather than relying on a third-party figure.
Spellbook: Is Spellbook's accuracy independently verified?
No. It publishes no accuracy figure of its own, and no third-party evaluation has been published. It did not participate in the Vals Legal AI Report, the main independent lawyer-baselined benchmark. Evaluate it on your own agreements during the trial.
Clio: Does Clio handle trust accounting?
Yes, and it is one of the main reasons firms adopt it, because client fund rules are strict and mishandling them is a regulatory matter.
Spellbook: Which models does it use and where does our text go?
Spellbook names OpenAI GPT-5 and Anthropic Claude models, and states it has zero data retention agreements with both providers. Confirm the current terms and subprocessor list against your client confidentiality obligations before use.
Clio: Is Clio suitable for a large firm?
It is aimed at small and mid-sized practices. Large firms with complex matter and billing structures usually evaluate heavier enterprise systems.
Spellbook: What does it cost?
Pricing is per seat but is not published. The vendor quotes it after a demo, so the seat rate cannot be compared with competitors in advance.
Clio: Does Clio integrate with existing tools?
Yes. Its integration directory is the largest in legal practice software, covering Microsoft 365, Google Workspace, QuickBooks and many others.
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