COMPARISON · UPDATED AUGUST 2026
iDealLegal.ai vs Harvey, Spellbook, Robin AI and LegalOn
Five AI contract review tools, compared on the four things that actually decide the purchase: where the work happens, how the review is structured, what it costs, and what happens to your documents.
Most legal AI platforms are built for AmLaw 100 firms and large enterprise legal departments — long evaluations, annual contracts, pricing on request. iDealLegal.ai is built for a narrower job: accurate contract review inside Microsoft Word, starting this week, without a sales call. Everything below is drawn from each vendor's publicly available information as of August 2026.
Free plan: 5 credits per month, no time limit. Works in Microsoft Word and Word Online. No demo call required.
BEFORE THE TABLE
You are choosing between two kinds of tool, not five versions of the same one
The five products on this page solve overlapping problems with very different scopes. Reading the table is much easier once you know which category you are actually shopping in.
Broad legal AI platforms
Harvey · LegalOn · Robin AI
Built as end-to-end environments for legal work, with their own web application at the centre. Word integration exists as an additional entry point rather than the primary way of working. Access typically starts with a demo request, and pricing is agreed rather than published. Designed for large firms and high-volume legal departments that want one platform across many workflows.
Word-native contract review
iDealLegal.ai · Spellbook
Built around a narrower problem: reviewing and redlining a contract inside the document itself. The product lives in Microsoft Word from the start, so the output arrives as Track Changes and Comments rather than in a separate interface. Both allow you to sign up and begin on your own. Designed for teams that want to start reviewing this week rather than run a procurement cycle.
Neither category is objectively better. They are answers to different questions. The table below shows where the differences actually fall.
SIDE BY SIDE
AI contract review tools compared
Seven criteria, chosen because each one changes the buying decision. Where a yes/no answer would be misleading, the cell explains instead. All values come from the vendors' own public materials as of August 2026 — see the sources at the bottom of this page.
- Confirmed
- Partial — see note
- Not offered
| Criterion | iDealLegal.aiTHIS PRODUCT | Harvey | Spellbook | Robin AI | LegalOn |
|---|---|---|---|---|---|
| Works inside Microsoft Word (Track Changes / Comments) | Primary interface | Via connector; its own chat is the primary UI | Primary interface | Word add-in available; its own web app is primary | Word integration alongside its own platform |
| Multi-level AI review with distinct roles | Junior Associate → Legal Associate → Senior Counsel | Agents — general-purpose, not specialised by review role | Associate agent for multi-document tasks | Agent mode for autonomous workflows | Agents for specific tasks |
| Start on your own, without a sales call | Self-service sign-up | —Demo request only | Self-service sign-up | Free plan available; paid plans via sales | —Demo request only |
| Free access to try the product | 5 credits per month, no time limit | —Not publicly offered | 7-day trial | Limited free plan | —Not publicly offered |
| Pricing published on the website | Full pricing public | —Enterprise contract | Team plans on request | —Not published1 | —Enterprise contract |
| Typical customer | Small and mid-sized businesses, in-house teams, small law firms | AmLaw 100, Fortune 500 | Broad range, from small firms to enterprise (4,500+ teams) | Large businesses with high contract volume (200+ per year) | Mid-sized businesses, in-house teams |
| Explicit "your data is not used to train models" statement on the site | Zero Data Retention2 | Not stated explicitly; SOC 2 / ISO certifications published3 | Not stated explicitly; Trust Portal with SOC 2 / HIPAA / GDPR3 | Not stated explicitly; ISO 27001 / SOC 2 / GDPR3 | States it never trains a third-party model |
Want the detail behind our own column? See iDealLegal.ai pricing →
- Confirmed
- Partial — see note
- Not offered
Compare iDealLegal.ai with:
Works inside Microsoft Word (Track Changes / Comments)
Primary interface
Via connector; its own chat is the primary UI
Multi-level AI review with distinct roles
Junior Associate → Legal Associate → Senior Counsel
Agents — general-purpose, not specialised by review role
Start on your own, without a sales call
Self-service sign-up
Demo request only
Free access to try the product
5 credits per month, no time limit
Not publicly offered
Pricing published on the website
Full pricing public
Enterprise contract
Typical customer
Small and mid-sized businesses, in-house teams, small law firms
AmLaw 100, Fortune 500
Want the detail behind our own column? See iDealLegal.ai pricing →
- 1.Robin AI does not publish pricing. A third-party review (agent-finder.co, 2026) estimates $30,000–$50,000 per year. Treat this as an unverified external estimate, not a vendor figure.
- 2.Zero Data Retention applies to iDealLegal.ai paid plans.
- 3.A certification list without an explicit training statement does not mean customer data is used for training. These vendors publish detailed security documentation; confirm the current policy in each provider's Trust Center before deciding.
- 4.Compiled from publicly available vendor websites and public reviews in August 2026. Products, plans and pricing change frequently — verify current terms with each provider.
WHERE THE WORK HAPPENS
We work where you already work
Harvey, Robin AI and LegalOn are built around their own web applications. Word integration exists, but it is an additional entry point rather than the primary way of working — which means switching windows, exporting and re-importing files, and learning a new interface.
iDealLegal.ai took the other approach. The product lives inside Word from the start. The review comes back as Track Changes you can accept or reject and Comments you can reply to — the same tools you already use to negotiate a contract. There is no separate interface for your team to learn, which means onboarding time for the interface itself is effectively zero.
- Your document stays your document. The review happens in the file you are already working on.
- Track Changes, not a chat transcript. Suggested edits arrive as redlines you can accept, reject or amend.
- Nothing new for the team to learn. If a colleague can use Word, they can use the review.
Spellbook is the other product on this page built Word-first. The difference between the two is not where they run, but how the review itself is structured — see the next section.
How the review is structured
Not one AI, but a team of three roles
Most tools in this category run a single AI agent, or put a chat window next to your contract. iDealLegal.ai structures the review the way a legal team actually works: three passes, each looking for something different.
Catches surface-level issues — missing definitions, inconsistent terms, drafting errors and the mechanical problems that should never reach a partner.
Checks the document against your playbook, flagging where the draft departs from the positions your team has already decided to take.
Looks for cross-clause risk — the conflicts that only become visible when provisions sitting on different pages are read together.
Three passes, one document, one consolidated set of redlines. This is closer to how contract review actually works in practice than "ask the AI and read the answer." See how it works →
CONFIDENTIALITY
Your data remains yours
Every product on this page takes security seriously and publishes documentation to prove it. What differs is how explicitly each one addresses one specific question: is customer data used to train AI models?
iDealLegal.ai
Zero Data Retention on paid plans. Your documents are not retained after processing and are not used to train models.
LegalOn
States on its website that it never trains a third-party model on customer data.
Harvey
Publishes SOC 2 and ISO certifications. An explicit training statement is not presented separately on its main pages.
Spellbook
Operates a Trust Portal with SOC 2, HIPAA and GDPR documentation. An explicit training statement is not presented separately on its main pages.
Robin AI
Publishes ISO 27001, SOC 2 and GDPR compliance. An explicit training statement is not presented separately on its main pages.
HONEST ROUTING
Which tool is right for you
No tool on this page is the right answer for every team. Here is our reading of where each one fits.
Choose iDealLegal.ai if…
- Contract review inside Word is the core of what you need
- You want redlines as Track Changes, not answers in a chat window
- You want to start this week, without a procurement cycle
- You want to see the price before you talk to anyone
- You are a small or mid-sized team, in-house or in a small firm
Choose an enterprise platform (Harvey, LegalOn) if…
- You are a large firm or a substantial legal department
- You need one platform spanning research, drafting, review and more
- You have the budget and the timeline for an enterprise evaluation
- Deep integration with existing enterprise systems is a requirement
- Guided onboarding and a negotiated contract are what you want
Consider Spellbook if…
- You also want a Word-first tool and want to compare two of them directly
- You want a short trial before committing
- A single-agent review fits your workflow better than a staged one
Consider Robin AI if…
- You process very high contract volume — in the region of 200+ per year
- Autonomous agent workflows matter more to you than working inside Word
- You can budget for enterprise pricing that is not published publicly
ALSO IN THIS CATEGORY
Other AI contract review tools you may encounter
These products came up during our research but sit outside the main table, either because the overlap with our own product is narrower or because there is less public information available for a fair comparison.
DocJuris
A similar pricing philosophy: no per-seat fees, no law-firm pricing. The product is built around its own CLM platform rather than around Word.
goHeather
The closest to us in positioning within the AI contract review category, but without deep Word integration or a publicly stated multi-agent approach.
Genie AI, Wordsmith AI and Vaquill AI
Smaller players with limited public information about pricing and functionality at the time this comparison was prepared.
FAQ
Frequently asked questions
Try AI contract review directly in Word
No sales call, no annual contract, no new interface to learn. Install the add-in, sign up, and review your next contract today.
5 free credits every month. Works in Microsoft Word and Word Online.
How we compiled this comparison
All information about other products comes from publicly available sources: the vendors' own websites and documentation, and publicly available reviews. We did not use paid analyst reports or any non-public information. Details were checked in August 2026.
Where a vendor does not publish a figure, we say so rather than estimating. The one exception is Robin AI's pricing, where we cite a third-party estimate and label it as such. Where a product's approach cannot fairly be reduced to yes or no, the table says "partial" and explains why.
This market changes quickly. Features, plans and pricing may have changed since publication — please verify current terms directly with each provider. If you believe anything on this page is inaccurate or out of date, tell us and we will correct it.
Sources checked: harvey.ai · spellbook.com · robinai.com · legalontech.com · docjuris.com · goheather.io · agent-finder.co (2026, third-party estimate)