CosmoLex vs ProLaw
CosmoLex scores 8.0/10 vs 6.0/10. Best for: Solo and small firms that want accounting, billing, and trust compliance in one platform so they can ditch QuickBooks entirely.
CosmoLex scores higher overall at 8.0/10 vs 6.0/10. CosmoLex is the best choice if you're tired of reconciling between your practice management tool and QuickBooks. The built-in accounting is genuinely complete, not a half-baked add-on. Skip it if you already have an accountant who handles your books and you just need case management.
CosmoLex 
ProLaw Rank
#4 of 39
Rank
#37 of 39
Features
17/18
Features
16/18
Starting at
$89/mo
Starting at
Custom
User reviews
4.3/5 (400)
User reviews
3.5/5 (50)
What they cost
| CosmoLex | ProLaw | |
|---|---|---|
| Starting at | $89 /mo | Contact for pricing |
| Free trial | 10 days | No |
| Number of plans | 2 | Custom |
What the pricing really means
CosmoLex publishes their pricing upfront, which is a good sign. ProLaw requires you to contact sales for a quote. When a company hides pricing, it usually means the cost is high enough that they want a salesperson to justify it before you see the number. Always ask for total year-one cost, not just the monthly subscription.
Where CosmoLex wins
- Only legal PM tool with full built-in accounting that genuinely replaces QuickBooks — not just a sync, actual double-entry bookkeeping
- Trust accounting and IOLTA compliance is the deepest in the market, with three-way reconciliation built in
- One subscription covers practice management + accounting + billing, which saves $50-100/month vs separate tools
- 10-day free trial to test whether the accounting features actually fit your workflow
Where ProLaw wins
- Backed by Thomson Reuters with direct integration to Westlaw and Practical Law
- Enterprise-grade financial management with LEDES billing, matter budgets, and profitability analysis
- Trust accounting with multi-bank, multi-currency support for large international firms
- Court rule calendaring included
Where CosmoLex falls short
- At $89/user as the only price tier, there's no cheaper entry point for firms that just want basic case management
- Interface is functional but not as polished as Clio or PracticePanther
- No court rule deadline calendaring built in
- CRM features require the $109/user plan, which pushes the price above most competitors
Where ProLaw falls short
- G2 rating of 3.5 and Capterra 3.8 indicate significant user frustration with the interface
- No public pricing — likely $200+/user based on the enterprise positioning
- No client portal, no mobile app, no eSignature, no intake forms
- Implementation takes months, not days
Who is each product built for?
CosmoLex
Target: 1-15 attorneys
CosmoLex is the best choice if you're tired of reconciling between your practice management tool and QuickBooks. The built-in accounting is genuinely complete, not a half-baked add-on. Skip it if you already have an accountant who handles your books and you just need case management.
ProLaw
Target: 25-1,000+ attorneys
ProLaw is a legacy enterprise product. Large firms already invested in Thomson Reuters' ecosystem may find value in the Westlaw integration, but modern alternatives like Filevine or Litify offer better user experiences at every scale.
Feature comparison
| Feature | CosmoLex | ProLaw |
|---|---|---|
| Case Management | ||
| Case / matter management | ||
| Contact management | ||
| Conflict checks | ||
| Client intake forms | ||
| Client portal | ||
| Documents & Automation | ||
| Document management | ||
| Document automation | ||
| E-signatures | ||
| Email management | ||
| Billing & Accounting | ||
| Time tracking | ||
| Billing & invoicing | ||
| Trust / IOLTA accounting | ||
| Scheduling & Deadlines | ||
| Calendar management | ||
| Task management | ||
| Court rule deadlines | ||
| Platform | ||
| Reporting / analytics | ||
| Mobile app | ||
| API access | ||
Common questions
CosmoLex scores 8.0/10 vs ProLaw's 6.0/10 in our ranking. CosmoLex is the better pick for 1-15 attorneys. ProLaw is better if you need large firms (50+ attorneys) that want enterprise practice management from a trusted legal tech brand with deep integration into thomson reuters' legal research ecosystem.
CosmoLex starts at $89/month. ProLaw uses custom pricing (contact sales). Watch for add-on costs — the base price often does not include all features. Pricing last verified 2026-04-11.
CosmoLex: Yes, 10-day free trial. ProLaw: No free trial. Always test with your actual workflow before committing to an annual plan.
CosmoLex covers 17 of 18 features we track. ProLaw covers 16 of 18. CosmoLex has broader feature coverage, but more features does not always mean better — pick the tool that covers what your business actually needs.
Yes, CosmoLex has a mobile app. ProLaw does too.
Yes. The main effort is migrating your data (customer lists, job history, invoices). Plan for 1-2 weeks of overlap where you run both. Most legal practice management tools can import CSV data. Ask both vendors about migration support before you sign.
The bottom line
Pick CosmoLex if...
Solo and small firms that want accounting, billing, and trust compliance in one platform so they can ditch QuickBooks entirely.
Pick ProLaw if...
Large firms (50+ attorneys) that want enterprise practice management from a trusted legal tech brand with deep integration into Thomson Reuters' legal research ecosystem.