The phrase “data room comparison” returns 40 articles that all look the same: a pivot table, an affiliate footer, no opinion. This is the table I built for our own purchase decisions when we were on the buyer side of two fundraises, with the asterisks where they need to be.
Tested in May 2026. Pricing in GBP. We do not take affiliate revenue from any of the listed vendors, so the recommendations match what the spreadsheet says, not what the affiliate program pays.
What buyers actually compare
After two fundraises and dozens of vendor conversations, six dimensions matter for UK SMB buyers. Everything else is marketing.
- Published pricing. Whether a list price exists at all, or you need a sales call.
- UK or EU data residency. Where the documents physically sit. Material for any ICO conversation.
- NDA gate with audit log. Can you make recipients accept an NDA, and does the log hold up later.
- Watermarking. Per-viewer dynamic watermark, not just a static brand stamp.
- Time to first share. From signup to a working tracked link.
- Per-user fees. Whether the team-size growth costs you anything.
Volume of documents, storage caps, and “AI features” rarely change the buying decision at this stage. Worth checking after you have a shortlist.
The comparison
| Vendor | Starting price | UK/EU residency | NDA + audit | Watermark | Time to share | Per-user fees |
|---|---|---|---|---|---|---|
| Beamprobe | £29/mo flat | UK or EU default | Yes, tamper-evident | Per-viewer dynamic | 90 seconds | None |
| Papermark | £19/mo or free | EU | Acceptance click only | Static | 5 minutes | Per user above free tier |
| Onehub | £25/user/mo | US | Acceptance click | Static | 30 minutes | Yes, per user |
| iDeals | ~£460/mo, quoted | EU optional | Yes | Per-viewer | 1 to 3 weeks | Tiered |
| Datasite | ~£750/mo, quoted | US default, multi-region negotiated | Yes | Per-viewer | 1 to 3 weeks | Tiered |
| Firmex | ~£899/mo, quoted | Multi-region | Yes | Per-viewer | 1 to 2 weeks | Tiered |
| ShareVault | ~£40/user/mo | US | Acceptance click | Static | 1 to 2 weeks | Yes |
Prices come from each vendor’s published rate card (Beamprobe, Papermark, Onehub, ShareVault) or from quotes shared with us in 2024 and 2025 (iDeals, Datasite, Firmex). The “quoted” prices vary by deal size, region, and project length. Use them as a directional anchor, not a guarantee.
Where the comparison breaks down
A table this neat hides three things:
1. “Free” is not always free
Papermark’s free tier caps you at a single document per link with limited analytics. Onehub Free is read-only for collaborators. Beamprobe Free allows one data room with up to 10 documents, which is enough to share a pitch deck pack but not a full M&A diligence file.
If you need free for a single pitch deck, all three work. If you need free for a fundraise, none of them quite work, and Beamprobe’s 14-day Pro trial without a credit card is the closest to “free for the full deal length.”
See: Free Virtual Data Room: 5 Tools That Don’t Cap You at 5 Documents.
2. Enterprise pricing is per-deal, not per-month
iDeals, Datasite, and Firmex quote per transaction. A single £20m M&A deal might run £4,500 over six months at Datasite, £15,000 at the upper end of their range. The monthly numbers in our table assume a typical UK SMB deal length of 3 to 6 months. Bigger deals cost proportionally more.
For deal-by-deal cost projections, the annual data room cost calculator takes the unknowns out of the per-deal pricing.
3. Audit log quality varies a lot
Every vendor in the table will tell you they have an audit log. The relevant question is whether the log holds up in a post-completion warranty dispute, six years later. Beamprobe, iDeals, Datasite, and Firmex all produce signed, tamper-evident PDF reports usable as evidence. Papermark, Onehub, and ShareVault produce simple CSV exports of view events without cryptographic integrity.
If you are running an M&A deal, only the first group is defensible. If you are sharing a pitch deck with seed VCs, the simpler logs are fine.
Datasite vs iDeals (the head-to-head)
If you are comparing iDeals and Datasite specifically, three things separate them in practice:
| Dimension | Datasite | iDeals |
|---|---|---|
| Built for | Tier 1 banks, £100m+ M&A | Mid-market M&A, fundraising |
| AI features | Datasite AI (redaction, smart Q&A) | Lighter, behind extra fee |
| EU data residency | Optional, multi-region | EU default available |
| Price floor | ~£750/mo per deal | ~£460/mo per deal |
| Onboarding | Dedicated project manager, 1-3 weeks | Less hands-on, 1-2 weeks |
| Sweet spot | Cross-border syndicate deals | UK and EU mid-market |
For UK SMB and accountancy work, neither is the natural fit. The pricing comparison is also material: a six-month deal costs £4,500-£15,000 at Datasite versus £174 on Beamprobe Pro.
Detail by vendor: Beamprobe vs Datasite, Beamprobe vs iDeals, Beamprobe vs Firmex.
Which to pick by use case
The matrix above does not tell you what to pick. This does.
You are raising a UK seed or Series A round. Pick Beamprobe or Papermark. The deck-tracking workflow is identical to DocSend, the audit log is enough, and you keep the data in the UK or EU. Save your money for legal fees.
You are selling a £5m to £50m UK business. Pick Beamprobe, iDeals, or Onehub depending on how hands-on you want vendor support. Beamprobe at £79 a month flat (Business tier) gives you the audit log, NDA gate, and bidder tracking without the project management wrap. iDeals at £460 a month adds white-glove support.
You are running a £100m+ M&A deal. Pick Datasite. The pricing is what it is, the buyer’s bank will accept it without questions, and the AI redaction features start to pay back at this scale. Worth the price for the right deal.
You are a UK accountant exchanging client tax records. Pick Beamprobe or look at the secure client portal comparison. Per-user pricing on Karbon or FYI gets expensive past a 10-person practice. UK residency matters in the ICO conversation.
You are sharing a pitch deck with five investors. None of the above. Use DocSend or a free alternative until interest is real, then graduate to a data room.
Methodology
We tested each vendor between October 2024 and April 2026 by signing up under a generic founder identity and running a small fundraise-style flow: upload a 20-document pack, configure NDA, generate per-recipient links, send to three test recipients, measure time to first view, export the audit log.
We did not pay for premium tiers we did not need. We did not ask vendors for trials longer than what is publicly offered. Pricing is what their rate cards say in May 2026 or what we were quoted in 2024-25 conversations.
We will refresh this table quarterly. If you spot a price that has changed or a feature that has shipped, mail [email protected] and we will update the row.
What we are not comparing
- Headcount limits, storage caps, and document limits. These rarely change buying decisions and they bury the actual comparison.
- “AI features.” Most are still beta. The two that matter (AI redaction, AI Q&A) are useful only at £50m+ deal size.
- SOC 2 and ISO certification. Important at enterprise scale, table stakes everywhere else. All seven vendors meet the baseline.
- Customer support quality. Subjective and changes monthly. Trust the audit-trail review on G2 if you want signal.
Related reading
- The UK Data Room Guide for first-principles framing
- M&A Data Room: A Practical Guide for UK Founders for exit-stage workflow
- Annual Data Room Cost Calculator for per-deal projections
- Beamprobe vs Datasite, vs iDeals, vs Firmex, vs Onehub, vs ShareVault, vs Papermark for head-to-head detail