The verdict in three sentences
In 2026, a New York law firm chooses between a legal SaaS at 40-120 EUR per user per month and a custom build at 50,000-140,000 EUR to run matters, time and billing. SaaS is enough for a firm under 10 lawyers without strong documentary demands; custom prevails once professional secrecy, EU hosting and a document vault become critical. The real budget plays out over three years, GDPR compliance included.
Key functions and 2026 prices
A firm software covers four blocks: matter and deadline management, time entry, billing, and secure document management. Here are 2026 orders of magnitude by option.
| 2026 function | Legal SaaS | Custom |
|---|---|---|
| Matters + deadlines | included | 15,000-35,000 EUR |
| Time entry + billing | included | 12,000-30,000 EUR |
| Document vault | +20-40 EUR/user/mo | +10,000-25,000 EUR |
| Secure client portal | paid option | +8,000-18,000 EUR |
| Certified EU hosting | included | 4,000-9,000 EUR/yr |
| Overall price | 40-120 EUR/user/mo | 50,000-140,000 EUR |
Professional secrecy demands access traceability and encryption at rest: native in custom builds, but plan-dependent in SaaS.
3-year TCO for a 10-lawyer firm
Let us compare a premium SaaS and a custom build for 10 users, vault included.
| 3-year item | SaaS 95 EUR/user | Custom |
|---|---|---|
| Build / licences | 0 EUR | 95,000 EUR |
| Subscriptions 10 users x 36 mo | 34,200 EUR | 0 EUR |
| Document vault | +10,800 EUR | included |
| Maintenance / EU hosting | included | 39,600 EUR |
| Client portal | +7,200 EUR | included |
| 3-year total | 52,200 EUR | 134,600 EUR |
SaaS stays cheaper on cash flow, but custom secures data ownership, a non-negotiable point for many bars. Past 18 lawyers, the annual gap flips.
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Mini case study
Mr. Lefebvre, managing partner of an 11-lawyer firm in Manhattan, ran a SaaS at 92 EUR/user/month (12,144 EUR/year) plus non-compliant external document storage. We delivered a custom build at 98,000 EUR with an encrypted vault and EU hosting. Result: removal of the non-compliance risk (potential GDPR penalty up to 4 % of turnover), and 6 hours/week of document search saved across the firm, i.e. about 300 hours/year at 90 EUR/loaded hour = 27,000 EUR/year of regained billable capacity.
FAQ
How much does a custom legal build cost in 2026? Between 50,000 and 140,000 EUR depending on modules. A 10-15 lawyer firm sits around 90,000-110,000 EUR with the vault included.
Does SaaS respect professional secrecy? Some plans do, provided you verify EU hosting, encryption at rest and access traceability. Custom guarantees these by design.
What does the document vault cost? 10,000 to 25,000 EUR in custom, or 20-40 EUR/user/month as a SaaS option. It quickly becomes essential for sensitive matters.
Where must data be hosted? In the EU, with a GDPR-compliant processor. Plan 4,000 to 9,000 EUR/year for certified hosting in custom.
How long to deploy? 3 to 6 weeks for a SaaS, 3 to 6 months for a custom build with historical matter migration and deadline setup.
Let's scope your project. Tell us your lawyer count, your professional-secrecy requirements and your vault need: we price SaaS vs custom over 3 years with an indicative budget. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
