CosmoLex vs Tabs3
CosmoLex scores 8.0/10 vs 6.5/10. 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 6.5/10. 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 
Tabs3 Rank
#4 of 39
Rank
#32 of 39
Features
17/18
Features
11/18
Starting at
$89/mo
Starting at
$60/mo
User reviews
4.3/5 (400)
User reviews
3.8/5 (200)
What they cost
| CosmoLex | Tabs3 | |
|---|---|---|
| Starting at | $89 /mo | $60 /mo |
| Free trial | 10 days | No |
| Number of plans | 2 | 2 |
What the pricing really means
At first glance, Tabs3 looks cheaper at $60/month vs $89/month. But sticker price is only part of the story. Look at what is included on the base plan, how many users you get, and whether you need add-ons to get the features you actually need. The $99/month plan that requires $200 in add-ons is actually more expensive than the $250/month plan that includes everything.
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 Tabs3 wins
- Trust accounting is rock-solid with three-way reconciliation that bar auditors love
- LEDES billing support for firms with corporate clients that require it
- 300+ built-in reports cover virtually every billing metric a firm would need
- Been around for 40+ years, so the billing engine is thoroughly tested and reliable
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 Tabs3 falls short
- Sold as separate modules (Tabs3 Billing + PracticeMaster), so getting full functionality means buying both
- No client portal, no intake forms, no eSignature, no mobile app — missing most modern features
- Interface looks like it belongs in 2005
- Cloud version exists but historically been on-premise, so the cloud experience feels bolted on
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.
Tabs3
Target: 1-30 attorneys
Tabs3 is for firms that prioritize rock-solid billing and trust accounting over a modern experience. If your bookkeeper and bar auditor love it, don't switch. But if you're choosing a new tool today, Clio or CosmoLex does everything Tabs3 does plus modern features.
Feature comparison
| Feature | CosmoLex | Tabs3 |
|---|---|---|
| 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 Tabs3's 6.5/10 in our ranking. CosmoLex is the better pick for 1-15 attorneys. Tabs3 is better if you need established firms that want proven, reliable billing software with deep trust accounting and don't care about having the newest interface.
CosmoLex starts at $89/month. Tabs3 starts at $60/month. 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. Tabs3: No free trial. Always test with your actual workflow before committing to an annual plan.
CosmoLex covers 17 of 18 features we track. Tabs3 covers 11 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. Tabs3 does not.
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 Tabs3 if...
Established firms that want proven, reliable billing software with deep trust accounting and don't care about having the newest interface.