Why this comparison matters
Legal AI tools cost more than most software. One seat can cost as much as a junior associate's monthly bar dues, parking and coffee combined. Harvey, Spellbook and GC AI are three of the most talked-about names, and they sell to different buyers. Picking the wrong one means a long contract for a tool your lawyers don't open.
Harvey goes after large law firms and big in-house departments with agents, a document Vault and memory, all sold through sales calls. Spellbook sits inside Microsoft Word and focuses on contract review and drafting. GC AI is built for in-house counsel, especially solo and fractional general counsel, and also ships a Word add-in. It is the only one of the three that has published a per-seat price.
This piece compares them on what the vendors document, what their pricing pages say, and what independent reviewers have reported. scored.tools does not run hands-on tests, so where a claim comes from the vendor alone, we say so.
Scores at a glance
These scores come from scored.tools' rubric, each criterion out of 10 and the overall rating out of 10.
| Criterion | Harvey | Spellbook | GC AI |
|---|---|---|---|
| Overall rating | 3.6 | 5.6 | 5.8 |
| Output quality | 6 | 6 | 6 |
| Ease of use | 3 | 7 | 7 |
| Pricing value | 2 | 4 | 4 |
| API and integrations | 2 | 5 | 6 |
| Problem fit | 5 | 6 | 6 |
All three score 6 on output quality, which is about where you land when the evidence is thin or mixed. The gaps open up on access and price. Harvey loses points because nobody can try it without a sales process and there's no public documentation. Spellbook and GC AI both let you start a trial on your own.
Feature comparison
| Feature | Harvey | Spellbook | GC AI |
|---|---|---|---|
| Primary buyer | Law firms, in-house teams, litigation practices | Lawyers who draft and redline in Word | In-house counsel, solo and fractional GCs |
| Microsoft Word add-in | Not listed in our data | Yes: review, drafting, ask, benchmarks, playbooks | Yes: GC AI for Word, redlining and drafting |
| Agents | Agents that carry out legal work end to end, per Harvey | Associate agent for multi-document workflows | Research agent plus 20+ agent connectors |
| Document storage and bulk analysis | Vault | iManage and cloud storage integrations | Multi-document analysis in chat |
| Case law research | Litigation coverage, per Harvey | Not a focus | Research agent over 13M+ US court opinions, per GC AI |
| Citation checking aids | Reviewers report fabricated citations | Benchmarks against industry standard terms | Exact Quote, which GC AI says is accurate to the character |
| Playbooks | Contract intelligence tools | Yes | Yes |
| Memory or personalization | Memory that carries preferences across the product | Not listed | Company profile built from setup questions |
| Public API or SDK | None found | None found | None found |
| Self-serve trial | None found | 7 days | 14 days, no card or demo |
Harvey
Harvey has the widest scope. Its site describes agents for end-to-end legal work, a Vault for storing and bulk-analyzing documents, memory that follows a user across the product, and contract intelligence tools. It covers firm work, in-house work and litigation. Adoption is real: per a review on haqq.ai, 42% of AmLaw 100 firms use it, and it scored 38/50 on an independent benchmark cited there.
The problems are just as well documented. Reviewers report fabricated case citations, and a ragbase.ai write-up describes workflow mismatch, limited customization, vault caps and low seat use at firms that bought it. We found no public API, no documentation and no trial. For a tool at this price, that is a lot of trust to extend before you see the product.
Spellbook
Spellbook stays close to where contract lawyers already work. The Word add-in bundles review, drafting, a question-answer mode, benchmarks against industry standard terms, and playbooks. The Associate agent handles work across several documents, and Spellbook lists integrations with iManage and cloud storage. Lawyerist rated it 4.1 out of 5 for in-Word drafting and clause review. That is the only independent review in our data, so treat it as one data point.
Spellbook also markets Autonomous Contract Management, covering intake through signature. That claim comes only from the vendor so far. Spellbook says 5,000+ in-house teams and law firms use it.
GC AI
GC AI is designed around in-house counsel. Its pricing page describes chat-based Q&A, drafting, web research and contract review, plus US Case Law and International Law databases, playbooks, and a pre-built skill library with workflows for MSAs, DPAs and privacy matters. Easy Prompt rewrites a plain-language request into a detailed legal prompt. The Exact Quote feature is the most practical thing here for anyone worried about hallucinations, because it points to the source text you need to check.
GC AI's own benchmark puts it at 86.8% against ChatGPT's 79.8%. The vendor ran that test, so read it as marketing until someone else repeats it. GC AI says 2,200+ legal teams use it. A vaquill.ai review found only two verified G2 reviews, so outside confirmation is thin.
Pricing comparison
| Plan detail | Harvey | Spellbook | GC AI |
|---|---|---|---|
| Published price | None, contact sales | None, contact sales | $500/month Individual (per our tool data) |
| Third-party estimate | $1,200 to $2,000+ per seat monthly; about $175,000 median annual contract | $350 to $500 per user monthly | n/a |
| Free trial | None found | 7 days | 14 days, no card or demo |
| Free plan | No | Free for students and educators | No |
| Team and enterprise plans | Custom | Contact sales | Team and Enterprise listed on the pricing page |
Harvey is the most expensive by a wide margin. The estimates above come from a vaquill.ai analysis, since Harvey publishes nothing. At $1,200 or more per seat each month, a 20-lawyer rollout passes $288,000 a year before any discounts.
Spellbook's paid tiers aren't published either. Bindlegal's 2026 pricing comparison estimates $350 to $500 per user monthly after the 7-day trial. Academic users get it free, which is useful for law clinics and teaching.
GC AI listed its Individual plan at $500 a month, including unlimited chats and skills, the Word add-in, 20+ agent connectors and unlimited Easy Prompt use. When we checked the pricing page in October 2026, it described Individual and Team plans without showing figures, and it listed US Case Law and International Law as add-ons for Individual. Confirm the current number before you budget. $500 for one seat is steep for a solo GC, but you can see what you are buying before you pay, which is more than Harvey offers.
Use case scenarios
Pick Harvey if you are a large firm with budget and procurement staff
If you run an AmLaw-scale firm, need one platform that covers litigation, transactional work and a shared document Vault, and can spend six figures a year, Harvey is the only tool here built for that scope. Its share of AmLaw 100 firms means peers have already done the vendor review. Budget for training and plan a citation-checking step, given the reported fabricated case law. Negotiate seat counts against real usage, because low seat use is one of the most common complaints.
Pick Spellbook if your lawyers live in Word and do mostly contract work
For a transactional team or a small firm that drafts and redlines in Word all day, Spellbook fits best. The add-in puts review, drafting and playbooks in the document, the iManage integration suits firms already on that document management system, and the Lawyerist 4.1/5 rating backs the in-Word drafting claim. The 7-day trial is short, so prepare real contracts before you start it.
Pick GC AI if you are in-house, especially a solo or fractional GC
GC AI wins for in-house counsel. The skill library targets the documents in-house lawyers handle most (MSAs, DPAs, privacy reviews), the case law research agent covers questions Spellbook doesn't focus on, and Exact Quote makes checking output faster. The 14-day trial with no card or demo is the most generous entry point of the three. The weak spot is independent evidence, so use the trial to check its citations against your own sources.
If you need an API
None of the three has a public API or SDK that we could find. If you plan to build legal AI into your own systems, this comparison won't give you that, and you should look at general-purpose model APIs instead.
Verdict
GC AI has the highest overall rating here at 5.8, with Spellbook close behind at 5.6 and Harvey well back at 3.6. The gap comes from access and pricing rather than output quality, where all three score 6.
- Best for in-house counsel: GC AI. A published price, the longest trial, case law research and character-level citations.
- Best for contract drafting in Word: Spellbook. The tightest Word workflow, iManage support and the only independent review rating in this set.
- Best for large firms with big budgets: Harvey. The broadest scope and heavy AmLaw adoption, offset by opaque pricing, no docs and reported citation errors.
For most teams under 50 lawyers, start with a trial of Spellbook or GC AI depending on whether your work is firm-side drafting or in-house counsel work. Only take a Harvey sales call if you need its full scope and can verify its output before anything goes to a client or a court.
