Guide
Data room security: the questions worth asking a provider
Updated
Security marketing is uniform: every provider claims encryption in transit and at rest, watermarking and document rights management. What matters is what a provider must evidence, not assert.
Talk to a specialist Six providers, four that publish a figure, three different billing units and the peak usage convention that decides what a diligence spike really costs you.
Attestations, not adjectives
An attestation is a third party's opinion produced under a standard. It is the only part of a security claim checkable from outside. CapLinked states SOC 2 compliance on its Team plan and a 99.9% uptime SLA on Enterprise. SecureDocs states a successful SOC 2 Type 2 audit and 99.9% uptime (read 23 October 2026).
Ask every provider on your shortlist for the report itself, under NDA if necessary, and ask what period it covers. A SOC 2 Type II covering a period that ended two years ago is a historical document.
Revocation is the real test
Document rights management is sold on the promise that access can be withdrawn after a file has been downloaded. That is a strong claim and it depends entirely on implementation, so test it rather than accepting it.
The test takes ten minutes in a trial: download a document as a guest user, revoke access, then try to open the file offline. Then try opening it on a second device. Whatever happens is the answer, and it varies more than the marketing suggests.
The audit log is the deliverable
In a disputed deal, the audit log is evidence. What matters is not that one exists. It is whether it exports, records views apart from downloads, and survives a user's removal from the room.
That last one catches people out. If deleting a bidder's account removes their history, the log cannot answer the question anybody will actually ask afterwards: what did that bidder see before walking away?
Who else is in the building
Where a provider sells a family of products, as Brainloop does with BoardRoom, MeetingSuite, DealRoom and CollaborationRoom, ask how tenancy and permissioning separate them. A board pack and a deal room have different populations and one of them contains people who must not see the other.
None of this is exotic and all of it is answerable in writing. A provider that answers these four questions crisply is telling you as much about its engineering as any certificate does.