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Side-by-side comparison · Legal, Finance & HR

Luminance vs Spellbook

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

Luminance

3.7

Free to start

Best overall

Spellbook

3.9

Free to start

Comparing 2 tools. Add one more if you like.

At a glance

Pick it if: Mid-sized and large in-house legal teams that negotiate and manage a high volume of contracts.

Best overallBest valueEasiest to use

Pick it if: Commercial lawyers, small firms and in-house teams who review and draft contracts in Word every day.

Overview

AttributeLuminanceSpellbook
In one lineContract review, negotiation and contract management for in-house legal teams.Drafts, reviews and redlines contracts inside Microsoft Word.
Pricing modelPaidPaid
Starting priceSee websiteSee website
Free plan No No
Works with Claude Code No No

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

AttributeLuminanceSpellbook
Overall rating3.73.9Winner
Ease of useHow quickly someone non-technical gets value from it.
3.5
4.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.
4.5
4.0
Output qualityHow good the results are before you fix them.
4.0
4.0
Value for moneyWhat you get for the price, including the free plan.
2.5
3.0
Speed & reliabilityHow fast it is and how often it falls over.
4.0
4.0

Feature comparison

A tick means it does this today. A dash means we haven't checked.

AttributeLuminanceSpellbook
Access & platform
Free plan No No
Mobile app––
Desktop app– Yes
Browser extension––
API access––
Teams & business
Team workspace Yes Yes
Enterprise plan or SSO Yes Yes
Connects to other apps Yes–
Open source or self-hosted No No
AI abilities
Works with your files Yes Yes
Understands images––
Makes images No No
Makes video No No
Writes code––
Runs agents or automations Yes Yes
Learns your brand or style– Yes
Works in many languages Yes–
Capabilities score6/ 176/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

AttributeLuminanceSpellbook
Plans

EnterpriseOur pick

Custom

Legal teams buying a full contract platform.

Free trial

Free for 7 days

Testing it on real contracts before you talk price.

Law FirmsOur pick

Custom

Private practice firms of any size.

In-House Teams

Custom

Corporate legal departments.

Which plan to pickThere is one route in: book a demo and get a quote. Ask which modules you actually need, since many teams only need Negotiate to start.Run the 7-day trial on contracts you actually negotiate, then ask for a quote. Get the per-seat price and any minimum term in writing, as third-party reports put prices anywhere from under US$200 to around US$350 per user a month.

Key features

AttributeLuminanceSpellbook
Standout features
  • Negotiate
  • Discover
  • Automate
  • Due diligence
  • Luna assistant
  • Review
  • Draft
  • Benchmarks and Compare
  • Playbooks
  • Associate

Pros and cons

AttributeLuminanceSpellbook
Pros
  • Covers review, negotiation, storage and workflow in one product
  • Strong record in M&A due diligence
  • Useful beyond legal: procurement, sales and HR can use it
  • Enterprise security certifications
  • Works inside Word with tracked-change redlines
  • Quick to learn, with little setup
  • Playbooks keep a team's positions consistent
  • Free trial before you talk to sales
  • Zero data retention agreements with AI providers
Cons
  • No public pricing and no free trial
  • Learning curve, and some manual tagging on non-standard contracts
  • Setup time before the portfolio features pay off
  • Too heavy and costly for small firms
  • No public pricing, and reported prices rose in late 2025
  • Word only, so Google Docs users are left out
  • Can suggest wrong or made-up language, so every change needs checking
  • No built-in contract repository or approval workflow

Who each one is for

AttributeLuminanceSpellbook
Best for
  • High-volume contract negotiation
  • Finding risks and renewal dates across all your contracts
  • M&A due diligence
  • Contract request-to-signature workflows
  • Reviewing and redlining contracts in Word
  • Drafting clauses and agreements from your templates
  • Applying a team playbook consistently
  • Small firms and in-house legal teams
You'll find it used by
  • In-house legal teams
  • Procurement teams
  • Law firms
  • Compliance teams
  • Commercial lawyers
  • Small law firms
  • In-house legal teams
  • Founders handling contracts

Questions people ask

Which is better, Luminance or Spellbook?

Spellbook scores highest overall in our ratings (Luminance 3.7/5 and Spellbook 3.9/5). Luminance is best for high-volume contract negotiation and finding risks and renewal dates across all your contracts. Spellbook is best for reviewing and redlining contracts in Word and drafting clauses and agreements from your templates.

Which is cheaper, Luminance or Spellbook?

Luminance: Pricing isn't published; check the vendor's site for a quote. Spellbook: Pricing isn't published; check the vendor's site for a quote.

Which is easier to use, Luminance or Spellbook?

Spellbook rates highest for ease of use in our scores. Commercial lawyers, small firms and in-house teams who review and draft contracts in Word every day.

How we compare

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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