Thomson Reuters ProLaw was built for large US firms. Atticus is built for Ontario lawyers — modern AI practice management with LSO compliance, transparent pricing, and same-day onboarding.
ProLaw is a Thomson Reuters enterprise product built for large US law firms. Atticus is designed specifically for Ontario small and mid-size firms — with LSO trust accounting rules, LAWPRO compliance, and Canadian billing formats built in from day one.
ProLaw implementations routinely take 3-6 months and require outside consultants. Atticus onboards in hours. Import your existing matters, set up billing, and start running your firm the same day.
ProLaw has no native AI. Atticus includes an AI assistant trained on Ontario legislation, LSO rules, and Ontario court forms — helping you draft, research, and manage matters without switching tools.
ProLaw enterprise licensing includes high upfront costs, annual maintenance fees, and consultant costs. Atticus is $149 CAD per user per month — everything included, no hidden fees, cancel anytime.
ProLaw runs on-premise or in hosted environments requiring IT infrastructure. Atticus is fully cloud-native — accessible from any browser, auto-updated, with enterprise-grade security and 99.9% uptime.
Configuring ProLaw for Ontario trust accounting requirements is a project in itself. Atticus handles s. 57 reconciliation, Form 9, and mixed trust accounts correctly by default — no configuration required.
| Feature | AtticusOntario-built | Thomson Reuters ProLaw |
|---|---|---|
| Built for Ontario law firms | Yes — Canadian compliance by design | No — US-focused enterprise software |
| Trust accounting (Law Society) | Full LSO-compliant trust ledger | Requires configuration for Canadian rules |
| AI document drafting | Built-in AI trained on Ontario law | No native AI — third-party integrations only |
| Deployment model | Cloud-native SaaS, any device | On-premise or hosted, complex IT setup |
| Implementation time | Same-day onboarding | Months of implementation, consultant fees |
| Pricing model | $149 CAD/user/month, all-inclusive | Enterprise licensing, high upfront costs |
| Client portal | Included — secure document sharing | Limited; add-ons required |
| Billing & invoicing | LEDES, flat fee, contingency, trust billing | Full billing suite — complex to configure |
| Mobile app | Full-featured mobile access | Limited mobile capability |
| Conflict checking | Automated conflict search on intake | Conflict module — manually configured |
| Matter management | Intuitive matter-centric workflow | Comprehensive but steep learning curve |
| Reporting | Real-time dashboards, LSO reports | Extensive reporting — requires training |
| Data ownership & portability | Your data, exportable anytime | Vendor-controlled, migration complex |
| Support | Dedicated Canadian support team | Enterprise support tiers, US-based |
$149 CAD / lawyer / month — everything included.
Import your matters, set up trust accounting, and start billing on day one. No implementation fees.
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