The verdict in three sentences
If your boutique runs fewer than 8 deals a year, renting a data room per mandate is still the rational choice. Above 10 to 15 deals a year, a custom virtual data room pays for itself within two to three years and strengthens your brand with sellers and bidders. The decision turns on three things: deal volume, EU data residency requirements and the level of audit trail your clients expect.
What renting really costs a Dublin boutique
A Dublin mid-market M&A adviser (targets with EUR 5 to 50 million revenue) rents a room for every mandate. Pricing in 2026 depends on page or gigabyte volume, duration and user count.
| Offer | Price per deal (2026 estimate) | Common limits |
|---|---|---|
| Entry-level VDR | EUR 1,000 to 2,000 | 3 to 6 months, capped storage |
| Mid-market plan | EUR 2,000 to 3,500 | basic watermark, limited Q&A |
| Datasite or Intralinks, mid-size deal | EUR 4,000 to 6,000+ | per-page or per-GB overages |
| Extension beyond 6 months | EUR 300 to 600 per month | common on long processes |
| Archive export at close | EUR 0 to 500 | often charged |
With 12 deals a year at EUR 3,500 on average plus extensions, the annual bill reaches EUR 42,000 to 48,000. That is the number to compare against an owned platform.
What a custom data room must include
To hold its own against Datasite and Intralinks, the minimum scope is:
- Dynamic watermarking on every page viewed or downloaded (name, email, timestamp, IP).
- Folder-level permissions: bidder A sees legal and financial folders, bidder B only commercial folders in phase 1.
- Full access log: who opened which document, for how long, from which device, exportable for the seller.
- Structured Q&A by folder, with internal approval before answers go out.
- New deal room in under 10 minutes, in your firm's branding.
- Hosting in an EU region (Dublin or Frankfurt), with encryption at rest and documented GDPR processing terms.
Build cost and break-even
| Item | Dublin agency range (2026 estimate) | Note |
|---|---|---|
| Full build | EUR 35,000 to 65,000 | depends on Q&A, e-signature, multi-firm |
| Timeline | 12 to 16 weeks | security testing included |
| EU cloud hosting | EUR 150 to 400 per month | encrypted object storage |
| Penetration test before launch | EUR 5,000 to 9,000 | strongly recommended |
| Application maintenance | EUR 53 to 183 per month (Kolonell grid) | by service level |
Kolonell's published grid places a data room of this scope in the complex application band, EUR 10,670 to 22,870+. A version without advanced Q&A can fit the medium band, EUR 6,100 to 10,670. Specialised hosting and external security audits are quoted separately.
| Deals per year | Annual rental cost (EUR 3,500 per deal) | Owned platform, 3-year amortisation + hosting |
|---|---|---|
| 5 | EUR 17,500 | not worth it, keep renting |
| 10 | EUR 35,000 | break-even around year 2 |
| 15 | EUR 52,500 | profitable in year 1 or 2 |
| 20 | EUR 70,000 | net saving above EUR 45,000 a year |
Risks to plan for
Security comes first: a document leak during a live sale can kill the deal and expose the firm. Penetration testing, mandatory two-factor authentication and encryption at rest are not optional. Adoption comes second: if bidders find your room clunkier than Datasite, their counsel will push back. A clean, install-free access flow is essential, and many boutiques run their first deal in parallel with a rented room.
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Mini case study
Ciarán, partner at an M&A boutique in Dublin, ran 14 deals in 2025. Average rental cost: EUR 3,800 per deal plus 4 extensions at EUR 450, so 14 × 3,800 + 1,800 = EUR 55,000 a year. Custom build: EUR 20,000 development, EUR 6,000 penetration test, EUR 300 a month hosting and EUR 114 a month maintenance, so 26,000 + 4,968 = EUR 30,968 in year 1, then EUR 4,968 a year. Cumulative 3-year saving: 165,000 − 40,904 = about EUR 124,000.
FAQ
At what deal volume does an owned data room pay off?
Usually between 10 and 15 deals a year, assuming EUR 2,500 to 4,000 rental per deal. Below 8 deals, renting remains cheaper.
Can a custom room be as secure as Datasite or Intralinks?
It can if it combines encryption, two-factor authentication, dynamic watermarking, full access logs and an annual penetration test, which costs EUR 5,000 to 9,000 from a specialist.
What about GDPR?
Hosting in an EU region, a documented processing agreement and role-based access cover most requirements. Retention and deletion rules after close should be configured per deal.
How long until the first deal runs on it?
Plan 12 to 16 weeks including 2 weeks of security testing, then run a pilot deal alongside a rented room.
Could we license it to other advisers?
Yes, a multi-firm architecture makes that possible. It adds roughly 3 to 5 weeks and is quoted separately.
Let's scope your project. Share your annual deal volume and hosting requirements, and we will scope the data room and its delivery calendar with you. 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.
