The verdict in three sentences
A legal document analysis AI extracts, summarises and compares clauses and exhibits across YOUR corpus, with US-based hosting that guarantees client confidentiality. In 2026, budget USD 25,000-70,000 for the build and roughly USD 550/month maintenance. ROI shows up in hours saved: up to -60% on contract review and due diligence, valued at the firm's billing rate.
What a custom legal AI costs in 2026
Pricing depends on document type (contracts, case law, data room) and the bar set for confidentiality and auditability.
| Scope | Build (USD) | Timeline | Maintenance/mo |
|---|---|---|---|
| Extraction + simple summary | 25,000 - 36,000 | 6 wks | USD 450 |
| Contract review + standard clauses | 36,000 - 52,000 | 8-10 wks | USD 550 |
| Full data-room due diligence | 52,000 - 70,000 | 10-12 wks | USD 780 |
| Dedicated sovereign hosting | +9,000 - 17,000 | +2 wks | +USD 220 |
Confidentiality is the critical line item: encryption, per-matter isolation and no data leaving your controlled environment. That is what separates a firm-grade solution from a consumer tool.
Time savings, priced at the billing rate
A partner bills USD 500-900/h, an associate USD 250-450/h. Cutting review time frees billable capacity or shortens client turnaround.
| Task | Manual time | With AI | Saving |
|---|---|---|---|
| Commercial contract review (30 pp.) | 3 h | 1.1 h | -63% |
| Due diligence (200 docs) | 40 h | 15 h | -62% |
| Key-clause extraction (batch of 50) | 8 h | 2.5 h | -69% |
| Case-law summary | 2 h | 0.6 h | -70% |
These are 2026 orders of magnitude: review stays lawyer-supervised, the AI prepares and flags, the human validates.
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
David, managing partner of a 12-lawyer firm in New York, spends 900 team-hours/year on contract review, valued at an average USD 350/h, i.e. USD 315,000 of capacity. He invests USD 50,000 in a contract-review AI, plus USD 550/month maintenance. With -60% review time, he frees 540 h/year, i.e. USD 189,000 of billable capacity recovered. The tool pays back in under 6 months while speeding up client deliverables.
FAQ
Does client data leave the firm?
No. In a well-built solution, hosting is in your controlled US environment, encrypted, isolated per matter, and no data feeds a third-party model's training. This is a non-negotiable ethics and privacy requirement.
Can the AI get a clause wrong?
Yes, which is why it stays an assistant: it flags, extracts and summarises, but a lawyer validates. Extraction precision runs 90-95% on standard clauses after tuning.
What is the implementation timeline?
Expect 6-12 weeks depending on scope. Building the reference corpus and clause templates is a large share of the initial effort.
Is it worth it for a small firm?
From 5-6 lawyers, the billable-capacity gain typically pays back the build within a year, especially on high-volume document work.
Let's scope your project. Tell us your document types, monthly volume and hosting requirements, and we'll price a legal AI in the USD 25,000-70,000 range. 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.
