Google Drive, Dropbox and Notion are not virtual data rooms. They can hold deal documents and share them with external parties, but none has an NDA gate, a per-user audit log suitable for a formal disclosure letter, or the permission controls a UK M&A process requires. For UK deal teams that need a purpose-built data room with EU hosting, SOC 2 Type II and an exportable audit log, Papermark is best.
This guide explains what each tool was actually designed to do, where it breaks for UK deal work, what UK GDPR requires from whichever tool you choose, and what a purpose-built alternative provides instead. For the full scored comparison of virtual data rooms ranked for the UK market, including assessments across security, pricing transparency, UK data residency, deal workflow and support, see the main guide.
What these tools are built for
Google Drive, Dropbox and Notion are general-purpose cloud platforms designed for internal collaboration among people who already trust each other. Google Drive is a file storage and real-time document editing system. Dropbox is a file synchronisation and sharing platform. Notion is a structured notes and knowledge-management workspace. All three are excellent at what they were built for, and that is precisely the problem: they were not built for time-limited, permission-controlled disclosure to external parties under legal scrutiny.
A virtual data room is a transaction platform. Its core purpose is to let a seller or issuer share confidential documents with one or more external parties under controlled conditions, maintain a complete and certified record of exactly who saw what and when, and close that access at the end of the process. The design priorities are audit completeness, permission granularity and access control, not editing convenience or team collaboration.
The tools overlap on one axis: they can all hold and share documents. They diverge on every other axis that a formal diligence process requires. UK deal teams are not choosing between equally capable tools. They are choosing between a tool designed for one job and a tool designed for another.
A UK deal scenario
Meridian Precision Ltd is a Birmingham-based precision engineering company with 62 employees and turnover of approximately eight million pounds. In August 2026, the founders instructed a corporate finance adviser to run a structured trade sale process targeting two or three strategic acquirers. The adviser set an eight-week timetable to management information, with a data room to follow.
The finance director had spent the previous three weeks assembling documents in a shared Google Drive folder. Three years of statutory accounts, a management accounts pack, a customer contract schedule, two property leases and an asset register were in place, along with the TUPE employee liability schedule required under Regulation 11 of the Transfer of Undertakings (Protection of Employment) Regulations 2006. She shared a link with the adviser and marked it as "internal access only" in the Drive settings.
The adviser came back within 24 hours with four problems. First: the shared link had no mechanism to require an NDA before document access. Any prospective buyer sent the URL could read the documents before any confidentiality obligation had attached. Second: the Drive activity log showed file views by account name but combined internal activity with external access, and there was no way to export a clean, named-user record for a specific external party over a defined date range. Third: the TUPE employee schedule, which contained every employee's salary, contract terms and disciplinary history, was in the same top-level folder as the financial accounts and was visible to everyone with link access. Fourth: there was no way to set a date on which access would expire automatically when a bidder withdrew or the process closed.
Meridian moved to a purpose-built data room. The same documents were uploaded, the employee schedule was placed in a folder restricted to shortlisted bidders by name, each buyer was required to countersign an NDA before the link resolved to any content, and dynamic watermarking was enabled on every document. The audit log from first access to deal close was exportable in a single action and was attached to the disclosure letter.
Where Google Drive falls short for UK M&A
No NDA gate. Google Drive has no mechanism to require an external party to sign a non-disclosure agreement before any document becomes accessible. Teams manage this separately, via email or a signing platform, and the platform does not enforce the sequence. If a buyer accesses documents before the NDA is countersigned, the disclosure record has a gap that cannot be closed retroactively.
Sharing links bypass folder permissions. A Google Drive link can be configured as restricted, meaning only named users can access it, but sharing settings are frequently misunderstood and easy to change. A user with edit access on a folder can create a new shareable link with broader permissions. The seller may believe access is controlled, but anyone with the link and the right settings can view, copy or download documents.
No per-user audit log suitable for a disclosure letter. Google Workspace generates activity logs that show file access by account name, but these logs include all internal activity across the organisation, require administrator access to export, and are not formatted to show a named external user's access record over a specific period. Producing a clean external access record for inclusion in a disclosure letter is a manual and error-prone exercise.
No Q and A module. A formal diligence process generates hundreds of buyer questions. Managing these through email means the same question arrives from multiple parties, answers are given at different times, and there is no central record. Google Drive has no Q and A workflow.
No watermarking. Drive does not apply dynamic watermarks to documents on access. A buyer who downloads a file receives a clean copy with no record of who downloaded it or when.
No automatic permission expiry. When a bidder withdraws from a process, their access must be manually revoked from every shared folder and file. There is no mechanism to set an expiry date tied to a deal timeline.
Where Dropbox falls short
Dropbox Business adds granular folder permissions and basic sharing controls that go beyond Google Drive's defaults, but it still falls short of a purpose-built data room in the areas that matter most for UK deal work.
Folder permissions are too coarse for a multi-party process. Dropbox allows folder-level access control by named user, but a deal process typically requires different parties to see different documents at different stages. A first-round bidder sees the financial accounts but not the TUPE schedule. A shortlisted bidder sees the employee schedule but not the exclusivity terms. Managing this in Dropbox requires creating separate folder structures per bidder group and managing permissions manually across each one, with no automated enforcement of the sequencing.
No NDA gate. Dropbox has no mechanism to require an NDA before a shared link resolves to document content. Access is governed by whether the link has been shared and the folder permission settings, not by whether a confidentiality agreement is in place.
No Q and A module. Dropbox is a file synchronisation and sharing platform. It has no built-in workflow for collecting, routing, tracking and responding to buyer questions in a structured record.
No dynamic watermarking. Dropbox does not apply viewer-specific watermarks to documents on access. A downloaded document is a clean copy.
Audit logs are not formatted for legal certification. Dropbox Business generates team activity logs, but extracting a named-user, per-document access record for a specific time period and external party, in a format suitable for attaching to a disclosure letter, requires manual filtering of a log that includes all internal activity across the workspace.
Where Notion falls short
Notion's limitations for deal work are more fundamental than those of Google Drive or Dropbox, because Notion is not primarily a document repository. It is a structured notes and knowledge-management workspace designed for teams building internal wikis, project trackers and operational documentation.
Not designed for confidential external access.Notion pages can be shared publicly or with specific email addresses, but the platform's permission model is designed for collaborative internal use. Granting a prospective acquirer access to a Notion workspace puts them inside a tool that was not built to enforce the boundaries a deal process requires. Workspace members can browse pages outside their intended scope if permissions are misconfigured, and permission misconfiguration is easy in a tool designed for open internal collaboration.
No access expiry.Notion has no mechanism to set a date on which guest access expires automatically. Removing a buyer's access when they withdraw or the process closes requires a manual action by a workspace administrator.
No audit trail for external access. Notion does not provide a per-page, per-user access log recording exactly when each external guest viewed each page and for how long. There is no record suitable for inclusion in a formal disclosure letter.
No NDA gate. Like the other tools on this list, Notion has no mechanism to require a non-disclosure agreement before a guest can access shared content.
No watermarking.Notion pages cannot be dynamically watermarked with a viewer's name and access timestamp.
For deal teams already using Notion for internal working papers and project management, the appropriate approach is to keep Notion for that purpose and use a purpose-built data room for external document disclosure. The two serve different functions and should not be merged.
UK GDPR and where the data sits
Using any of these tools to share deal documents with an external party is not automatically a UK GDPR breach, but it creates accountability obligations that are substantially harder to satisfy than with a purpose-built data room.
The relevant principle is Article 5(1)(f) of UK GDPR, the integrity and confidentiality requirement. Personal data must be processed in a manner that ensures appropriate security, including protection against unauthorised or unlawful processing. For a data room holding TUPE employee records, customer contracts with individual names, or financial information traceable to identifiable people, that obligation is live from the moment external access is granted.
Article 5(2) imposes an accountability obligation on top: the controller must be able to demonstrate compliance with the principles. In a deal context, that means being able to show, if challenged by the ICO or by a party to the transaction, exactly who accessed which personal data, when, and under what authority. None of Google Drive, Dropbox or Notion generates that record natively in a format designed for legal certification.
There is also a data location question. Google Drive stores UK business data across Google's global infrastructure by default. Enterprise customers can select a European Union data region, but there is no United Kingdom region, and Google's support and security teams retain access regardless of region selection. Dropbox offers European data storage on Advanced and Business Plus plans, with a similar caveat about US team access. Notion's infrastructure is primarily in the United States with no selectable region on standard plans.
Granting an external party access to documents stored on these platforms is a restricted transfer under UK GDPR if the platform processes data outside the UK. Transfers to the EEA are covered by UK adequacy regulations, so EU storage satisfies the storage layer of that analysis, but it is not the same as UK hosting. For more on what UK data residency means in practice for deal teams, including when EU hosting satisfies and does not satisfy the restricted transfer analysis, see the full guide to UK data residency.
TUPE employee liability information is particularly sensitive under UK GDPR because it includes each transferring employee's identity, age, employment terms, disciplinary and grievance history and applicable collective agreements. Placing this in a shared Drive folder or Dropbox share accessible to all invited users in a buyer consortium makes it very difficult to demonstrate to the ICO, if challenged, that access was limited to those who needed to see it. A data room with folder-level permissions for named users and an audit log recording exactly who accessed the employee folder and when answers that question directly.
What a purpose-built data room provides instead
A purpose-built data room addresses each of the gaps above by design rather than by configuration workaround. The core capabilities are not premium features: they are the baseline that any formal diligence process requires.
An NDA gate enforced by the platform prevents any document access before the agreement is countersigned. The countersignature timestamp is part of the same audit log as the first document access, so the sequence is recorded without manual coordination.
Granular, folder-level permissions for named users or bidder groups allow a first-round buyer to see financial accounts but not the employee schedule, and a shortlisted buyer to see everything within their permitted scope. Permission grants and changes are logged automatically.
An append-only audit log records every view, download, print and permission change by every named external user. The log is formatted to be exported and attached to a disclosure letter at close. It cannot be edited or deleted after the fact.
Dynamic watermarking embeds the viewer's name and access timestamp into every page of every document, including downloaded copies. This deters casual copying and allows a leaked document to be traced back to its source.
A Q and A module routes buyer questions to the right workstream adviser, prevents bidder groups from seeing each other's questions, and produces a complete log of every question and answer that can be reviewed at close or used as part of the disclosure record.
Automatic permission expiry closes access at a date set in advance, without requiring a manual action at deal close or when a bidder withdraws.
Papermark covers all of these on the Data Rooms plan at EUR 99 per month, with EU hosting on AWS eu-central-1 in Frankfurt, SOC 2 Type II and ISO/IEC 27001 certification, and an NDA gate that can be live within minutes of uploading documents. Pricing is in euros only with no sterling option. For a full scored assessment across all five criteria, including security, pricing transparency, UK data residency, deal workflow and support, see the ranked guide to virtual data rooms for the UK market.
On pricing, the range across the UK market is wide. For a full comparison of every published price, including which providers quote in sterling and how storage overage is charged, see the costs overview. For a parallel look at how another common document-sharing tool compares against a data room for UK deal work, see the analysis of SharePoint as a virtual data room.
Common mistakes when using cloud tools for deals
Not gating access with an NDA before sharing the link. In the early pressure of a process, sellers frequently share a Drive folder or Dropbox link with a prospective buyer before any confidentiality agreement is in place. There is no mechanism in any of these tools to prevent document access until the NDA is countersigned. The result is a disclosure record with a gap: documents were accessible before any legal obligation of confidence attached, which creates exposure if the deal does not complete.
Sending download links instead of view-only access. Google Drive, Dropbox and Notion all allow document sharing in download-disabled modes, but these settings are easy to bypass or misconfigure. A buyer who receives a document with download permissions can create a copy outside the seller's control immediately. A purpose-built data room applies watermarks and download controls at the platform level, not as a setting the sharer has to remember to configure correctly every time.
Mixing deal documents with operational documents. Assembling a data room in an existing Drive or Dropbox workspace means deal documents sit alongside internal operational files. The risk is accidental exposure: a permission change or an incorrectly configured link can grant a buyer access to files that were never intended for disclosure. A purpose-built data room is an isolated environment with no connection to any other company system.
Not setting access expiry at the outset. When a bidder withdraws from a process, their access to every shared folder and file should be revoked immediately. In a general-purpose cloud tool, this requires a manual action across potentially multiple shares, at a point in a deal when attention is elsewhere. Missing a folder can leave a withdrawn buyer with ongoing access to confidential documents for weeks or months.
Confusing general-purpose RBAC with data room permissions. Google Drive, Dropbox and Notion all offer role-based access controls: viewer, editor, commenter and so on. These are not the same as data room permissions. A data room permission model is designed specifically for time-limited external disclosure: it supports staged release by bidder phase, named-user restrictions on individual folders, and automatic revocation at process close. The general-purpose tools support sharing and collaboration. The two models are different in purpose and in the audit record they produce.
For a parallel analysis of a similar substitution mistake, see the guide to DocSend alternatives for UK founders, which covers the same structural questions from the perspective of a document-sharing tool rather than a full cloud workspace.