Casetext CoCounsel vs Luminance
A detailed comparison to help you choose between Casetext CoCounsel and Luminance.
🏆
Verdict: Luminance wins
Luminance scores 3.8/5, edging out Casetext CoCounsel at 3.1/5. Enterprise legal, procurement and finance teams at real contract scale who need portfolio intelligence and playbook-driven negotiation and are comfortable with a procurement-led purchase.
Casetext CoCounsel AI legal research and drafting | Luminance AI legal platform for contract review | |
|---|---|---|
| Rating | 3.1 (1 review) | 3.8 (1 review) |
| Pricing Model | paid | paid |
| Starting Price | From $225/mo | From $1000/mo |
| Best For | US law firms of five or more attorneys already invested in Westlaw or Practical Law that want AI research and drafting inside that ecosystem. | Enterprise legal, procurement and finance teams at real contract scale who need portfolio intelligence and playbook-driven negotiation and are comfortable with a procurement-led purchase. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | team features | ssoteam features |
| Visit Casetext CoCounsel → | Visit Luminance → |
Casetext CoCounsel
Pros
- + Citations in my checks resolved to real documents in the account library, with KeyCite treatment signals attached
- + Task-shaped outputs (research memos, obligation logs, timelines) rather than raw chat
- + Word drafting anchored to Practical Law precedent cut my NDA first-draft time to about 15 minutes
- + Document review reliably handles first-pass summarisation and clause extraction
- + Bundled Westlaw and Practical Law access removes the tab-switching that slows legal research
Cons
- - Standalone Casetext was retired on 2025-04-01; you cannot buy the old product at any price
- - No self-serve trial or published list price — everything routes through a configurator or sales call
- - Estimated $293/seat/month floor for the entry tier (Spellbook's configurator read, June 2026), roughly 30% above the old $225 standalone price
- - US law is the centre of gravity; most of the value evaporates for non-US practice
- - Missed a cross-reference in a lease amendment during my document review test — human review still required
Luminance
Pros
- + Panel of Judges multi-model consensus architecture addresses hallucination risk in a way single-model review tools do not — described consistently across vendor and independent technical analyses
- + Discover repository layer answers plain-language questions across the contract estate with clause-level references, usable by non-legal departments
- + Autonomous negotiation handles standard agreements (NDAs) end to end in the demonstrated workflow
- + Enterprise security posture: ISO 27001 and SOC 2 Type II, with named customers including Staples, Hitachi and AMD
- + Gartner Peer Insights ratings of 4.6-4.7 across categories (26-31 ratings at time of writing)
Cons
- - No published pricing, no self-serve tier, no free trial — every path ends at a sales demo
- - Third-party estimates imply roughly $43k-$60k per customer per year, out of reach for small and mid-sized teams
- - Reported 36-month terms with document-based metering make cost forecasting hard
- - Implementation and playbook configuration require real setup time
- - Autonomous negotiation is limited to standard agreements; novel clauses still need lawyers
Frequently Asked Questions
Which is better, Casetext CoCounsel or Luminance?▼
Luminance scores higher at 3.8/5 vs 3.1/5 for Casetext CoCounsel, making it the better-rated option in our comparison.
What is the difference between Casetext CoCounsel and Luminance?▼
Casetext CoCounsel: CoCounsel Legal is Thomson Reuters' AI assistant for lawyers, used for legal research, reviewing and summarising documents, and drafting. Formerly Casetext; sold per user. Luminance: AI platform used by top law firms for reviewing, analyzing, and negotiating contracts with ML trained on legal documents.
Is Casetext CoCounsel or Luminance more affordable?▼
Casetext CoCounsel starts at €225/mo, Luminance starts at €1000/mo. Check the comparison table above for current pricing.
Stay in the loop
Get weekly updates on the best new AI tools, deals, and comparisons.
No spam. Unsubscribe anytime.