Kira Systems vs Luminance
The two incumbents of AI due diligence, with opposite instincts. Kira Systems (now part of Litera) is extraction-first: 1,400+ pre-trained clause models that pull provisions out of large document sets, which is why it dominates M&A data rooms. Luminance is anomaly-first: it learns what is normal in your agreements and flags deviations and missing clauses, with 80+ language support for cross-border portfolios. Neither publishes pricing; third-party reports put entry around $18,000-$30,000 per year for Kira and around $30,000 per year for Luminance, both quote-based. Pick Kira for high-volume extraction, Luminance for portfolio-wide risk spotting. No hands-on testing was done for this comparison.
| Decision point | Kira Systems | Luminance |
|---|---|---|
| Best suited to | Large law firms and corporate legal teams that review high volumes of contracts. | Enterprise legal teams that need contract intelligence across negotiation and obligations. |
| Plans and cost | Quote-based only; no published prices and no published trial. Kira is now a Litera product (acquired August 2021). Coverage: 1,400+ provision models, 1,000+ built-in smart fields, 40+ categories, Generative Smart Fields, Concept Search, GenAI governance, plus Lito for due diligence bundled with Kira. Vendor claims about 70 of the top 100 global law firms use Kira and a Tier 1 legaltech ranking for two years running; those figures are vendor claims, not independently verified. | The page leads with a request-a-demo entry; plan amounts are not listed on the homepage text read. |
| Limitations | Kira publishes no prices; access starts with a demo, and trial availability is unconfirmed. AI review is a first pass, not a signature: final contract review still requires a licensed lawyer. | Demo-led enterprise product; no self-serve signup or plan amounts on the homepage text read. |
Use the same input
Load a 500-document data room into each and ask: which contracts deviate from the standard change-of-control clause? Compare how each tool surfaces the outliers.
What a successful result must preserve
The tool must process hundreds of documents in bulk, extract or flag the target provisions, and justify each finding well enough for a deal team to rely on.
Evidence and test status
Pricing and feature comparison based on publicly available information. Pricing is enterprise and quote-only; figures cited are third-party reports, re-checked October 2026. We did not run a scored hands-on test; no quality ranking is claimed.
- Kira Systems — Kira Systems official homepage ↗ (reviewed 2026-10-31)
- Luminance — Luminance homepage ↗ (reviewed 2026-11-04)