Luminancevs
Relativity
Relativity: Established review platform better suited to litigation document review than transactional contract analysis
Luminance
Machine learning contract analysis for review, negotiation and compliance
As of 31 August 2026, Luminance's pricing is not published; the vendor quotes on request. Contract analysis software that flags anomalies across large document sets. Softwr lists it under Legal. Luminance is made by Luminance Technologies, available on Web, Windows.
Overview
What Luminance does
Luminance applies machine learning to sets of contracts, supporting negotiation against a playbook, transactional due diligence and compliance review across large document populations. It extracts clauses, compares documents against the rest of the set and surfaces provisions that are unusual or missing. The operating company, Luminance Technologies Ltd, was incorporated in Cambridge in November 2015 and was backed from launch by Invoke Capital, the fund founded by Mike Lynch. The marketed differentiator is that it identifies anomalies without a user first defining what to look for, which is genuinely different from keyword and rules-based review. What is documented about how well it does that is the part a buyer should read carefully. Luminance did not participate in the Vals Legal AI Report, the lawyer-baselined independent benchmark published in February 2025, which evaluated CoCounsel, Vincent AI, Harvey Assistant and Oliver. The only named benchmark associated with Luminance is ContractIQ Bench, which Luminance states its own research team built, and which it used to report a five per cent accuracy improvement over unnamed comparison models on an unreleased dataset with no published baseline or task breakdown. Its widely repeated figures, such as ninety per cent time savings, are unattributed marketing claims about time rather than measurements of accuracy, and the televised contract negotiation demonstrations were company-run events with a journalist as audience rather than evaluator. None of this means the product does not work; it means no independent evidence has been published either way, so a proof of concept on your own documents is the only evidence you will get. It was originally sold to large law firms for M&A diligence, launching in collaboration with Slaughter and May, but has pivoted toward large enterprise in-house legal, compliance and procurement teams, with law firms now a secondary segment. Pricing is not published.
What people use it for
- In-house teams auditing a contract estate for a specific exposure such as change of control
- Procurement and compliance functions reviewing supplier agreements at scale
- Transaction teams reviewing large contract populations against a deal deadline
- Negotiation teams applying a standard playbook consistently across many counterparties
Related searches
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Luminance.
- No independent evaluation of its accuracy has been published, and it did not take part in the Vals Legal AI Report, so buyers have only vendor-produced evidence to work from.
- The one named accuracy benchmark, ContractIQ Bench, was built, run and scored by Luminance on a dataset it has not released, against comparison models it does not name.
- Value scales with document volume, so an organisation reviewing tens rather than thousands of contracts will not recover the licence cost.
- Output still requires qualified review, so it reduces reading time rather than removing the lawyer, and staffing plans that assume otherwise fail.
- Pricing is not published, so cost per matter cannot be modelled until after a sales process and a proof of concept.
Cross-shopped
What people choose instead of Luminance
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- LuminancevsEverlaw
Everlaw: Litigation review with its own analytics, when the problem is discovery rather than contracts
- LuminancevsIronclad
Ironclad: Contract lifecycle management for in-house teams managing contracts forward rather than analysing an existing estate
Pricing
What Luminance costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Luminance
On request
- Enterprise licensing quoted per organisation
- Scoped by user count and document volume
- Proof of concept normally run before contracting
Capabilities
Features
Anomaly detection
Flags clauses that deviate from the norm across a document set
Contract negotiation
Drafting and redlining against a firm or client playbook
Due diligence review
Bulk contract review for transactions with clause extraction
Multi-language analysis
Review across contracts written in several languages
Document comparison
Version and precedent comparison across a contract population
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
Is Luminance's accuracy independently verified?
No independent verification has been published. It did not participate in the Vals Legal AI Report, the main lawyer-baselined benchmark, and the only named benchmark in its materials is one it built and ran itself. Treat the published figures as vendor claims and run a proof of concept on your own documents.
What do the ninety per cent time-saving claims mean?
They are unattributed marketing figures about time and cost rather than accuracy, published without methodology, dataset or baseline. They are not a measure of how often the software is right.
Who backs Luminance?
It launched in 2016 with backing from Invoke Capital, the fund founded by Mike Lynch, and has since raised further rounds led by March Capital and Point72 Private Investments.
Keep looking
Where to go from Luminance
- Luminance alternativesEvery product people weigh against it
- Luminance pricingPlans, floors and what the tiers exclude
- Luminance badgesWhich rules it meets, and the figure behind each
- All Legal softwareThe full category
- Best Legal softwareThe shortlist, and how it was cut
Best Legal software for
Compare Luminance with
- Spellbook
- Everlaw
- Relativity
- Ironclad
- Harvey
- Litera
- Westlaw
- LexisNexis
- DISCO
- Logikcull
- NetDocuments
- iManage
- Intapp
- Litify
- Rocket Matter
- Secure Privacy
- Tabs3
- Litera
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Softwr does not host reviews and shows no star rating for Luminance, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
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