The comparison
| Tool | Main job | Who it's built for | Published pricing | What we couldn't verify |
|---|---|---|---|---|
| LegalOn | AI contract review and redlining against playbooks in Word or the browser; higher tiers add custom playbooks, a contract vault, matter management and intake agents | In-house legal and contracting teams; the Core Review plan page lists solo attorneys and fractional GCs | Not published; per-seat quote after a demo | Accuracy, jurisdiction coverage, which plans include the Word add-in beyond Core Review, add-on prices |
| Spellbook | Contract review and drafting in Word (redlines, Associate for multi-document work, Compare, Ask, Playbooks) | In-house teams and law firms, with separate plans for each | Not published; custom, based on team members on the license; 7-day free trial on the law-firm plan | Accuracy, languages and jurisdictions, Associate and Playbook Build Service pricing |
LegalOn's site is at legalontech.com; we could not open legalon.com from our server, so every LegalOn fact here comes from legalontech.com pages.
Who each is for
LegalOn. Its pricing page builds three tiers: Core Review (review, redlining, assistant, pre-built playbooks, Word add-in), Contracting Suite (adds custom playbooks, Vault, team training, SSO) and Productivity Suite (adds matter management and intake from email, Slack and Teams). That matches an in-house legal department that wants review plus a request queue and repository in one place. It is thinner on what it says about law-firm use: the pages we read don't explain how the product differs for firms.
Spellbook. Its pricing page splits "Law Firms" and "In-House Teams," both with the Word add-in and Associate, and the in-house plan adds a Playbook Build Service. It reads as a Word-first drafting and review tool. The pages we read don't list languages or jurisdictions, and its repository product (ACM) is early access, so a team wanting intake and a contract vault in one platform should ask what is generally available today.
If your lawyers already work in Word and mostly need redlines against your standards, both fit; for a broader law-firm set see our Spellbook alternatives and the Spellbook vs Luminance page. Our existing profiles are LegalOn and Spellbook, and we have a Spellbook Word add-in deep dive. Those pages are our own earlier writing, not proof; the facts here come from the vendors' pages.
Word add-in, playbooks, languages
Word add-in. LegalOn lists the Microsoft Word add-in under Core Review, and its pricing blog says Word integration is included; its review page says you can edit "in Word or Web" and that it works with .docx and PDF. Spellbook's review page says redlines are added "right in Microsoft Word," appear under the user's name, and can be bulk-approved.
Playbooks. LegalOn lists 135+ attorney-built pre-built playbooks on its pricing and review pages, with custom playbooks in plain English from the Contracting Suite up. One older LegalOn blog page still says "50+ playbooks," so the count differs between its own pages. Spellbook describes custom playbooks you save and reuse, and its in-house plan includes a Playbook Build Service. It doesn't publish a pre-built playbook count on the pages we read.
Languages and jurisdictions. LegalOn says it translates 28+ languages into English for review and back into the original for redlines, and lists "International Playbooks" for 23 countries; neither is tied to a plan on the pricing page. Spellbook's pages don't state languages or jurisdictions. If you review contracts governed by non-US law, ask both for a list and a trial on your own paper.
Pricing, as shown on October 21, 2026
- LegalOn (pricing page): no prices shown. It says pricing is built "around your team size and the capabilities you need," each plan has a "Book a Demo" button and "Add-ons available." Its pricing post says plans are per seat, with no per-contract charges and no implementation fees.
- Spellbook (pricing page): no prices shown. It says pricing is structured around the number of team members on your license. Law Firms has "Start Free Trial" (the page says 7 days, with extended trials possibly available for larger organizations); In-House Teams has "Book a Demo."
Figures you may see elsewhere, such as per-user annual estimates, come from competitor comparison sites that don't match each other, so we left them out. See also Spellbook pricing.
What we couldn't verify
- Accuracy of either tool's review: neither page we read gave a method or a benchmark.
- Security: LegalOn's homepage cites SOC 2 Type II, ISO 27001, GDPR and CCPA; Spellbook's security page lists SOC 2 Type II, HIPAA, GDPR and EU AI Act compliance and doesn't mention ISO. We haven't seen audit reports. Spellbook's page names zero-data-retention agreements with OpenAI and Anthropic but doesn't state whether customer data is used for training; LegalOn says customer data isn't used to train third-party models.
- Jurisdictions: LegalOn's review page lists none; Spellbook's pages list none.
- Which LegalOn tiers beyond Core Review include the Word add-in: the pricing page doesn't say.
- Add-on prices at LegalOn, and Associate, ACM and Playbook Build Service prices at Spellbook.
- LegalOn's law-firm page (legalontech.com/law-firms) returned 404, and legalon.com didn't resolve from our server.
- ROI claims on both sites (time saved, percentage reductions) are vendor-provided with no stated method.
- Customer counts on both sites: not used here.
How we'd test the two in a week
- Pick three closed contracts you know well (say an NDA, an MSA and a DPA) and your current playbook or review checklist.
- Ask both vendors for a trial or sandbox; Spellbook's law-firm plan lists a 7-day trial, LegalOn requires a demo.
- Run each contract in Word through both tools and score changes missed, changes invented and redlines that follow your fallback positions. Our playbook governance guide has a scoring template.
- Test one contract in a second language or governing law if you have any, and see what each tool does.
- Ask both for the data processing agreement, the security reports and a written answer on model training, and ask what your tier excludes.
Sources
- LegalOn pricing (page read October 21, 2026) (Vendor claims; three plans, features, no prices, Book a Demo)
- LegalOn pricing post (page read October 21, 2026) (Vendor claims; per seat, no per-contract fees, Word integration included, 50+ playbooks wording)
- LegalOn Review (page read October 21, 2026) (Vendor claims; Word or Web, .docx/PDF, 28+ languages, 135+ playbooks)
- LegalOn home (page read October 21, 2026) (Vendor claims; in-house focus, certifications, 135+ playbooks)
- Spellbook home (page read October 21, 2026) (Vendor claims; modules, in-house teams and law firms, ACM early access)
- Spellbook pricing (page read October 21, 2026) (Vendor claims; no prices, plans, 7-day trial, Playbook Build Service)
- Spellbook Review feature (page read October 21, 2026) (Vendor claims; redlines in Word, custom playbooks)
- Spellbook security (page read October 21, 2026) (Vendor claims; SOC 2 Type II, HIPAA, GDPR, ZDR with OpenAI and Anthropic)
Questions and answers
LegalOn vs Spellbook: which is better for contract review?
We haven't tested either, so we can't rank them. Both review and redline in Word against playbooks; LegalOn adds matter intake and a vault in its higher tiers, while Spellbook centers on Word with Associate for multi-document work.
Is LegalOn worth it for a small in-house team?
Its Core Review plan page is aimed at solo attorneys and fractional GCs, but no price is published, so the answer depends on the per-seat quote after a demo. Compare that quote with the hours your own reviews take.
How much does LegalOn cost compared to Spellbook?
Neither publishes a price on its pricing page as of October 21, 2026. LegalOn quotes per seat after a demo; Spellbook bases pricing on the number of team members on the license.
Does Spellbook work in Word like LegalOn does?
Yes, both describe Word add-ins that insert redlines. LegalOn also lets you work in a browser, and its pages list .docx and PDF support; Spellbook's review page only mentions Word.
Can LegalOn review contracts in other languages?
LegalOn says it translates 28+ languages into English for review and can translate redlines back. It doesn't say on the pages we read which plan includes this, so ask in the demo and test it on a real foreign-language contract.
Operational information, not legal advice. Tool descriptions are each vendor's own claims, read October 21, 2026; we did not test any product. Prices change; check the vendor page before you decide.