Custom virtual data room development for M&A deals, fundraising, property transactions and banking compliance reviews. Deep audit trail, per-user watermarking, Q&A workflow and EU hosting, without the SaaS look of standard providers.
Intralinks (SS&C), Datasite, Ansarada, Drooms, Firmex, Dropbox Capital, iDeals, SecureDocs and OneHub together serve the vast majority of global M&A deals. For a one-off acquisition or fundraising round, we will usually simply advise you to use one of those standard data room providers. We do not replace a working SaaS product with unnecessary custom development. You rent a data room for a single deal; you build a platform to run your business on.
A custom due diligence platform only becomes worthwhile when you do deals repeatedly, when your advisory firm handles two to five engagements in parallel every month, when you want a white-label environment under your own brand rather than your supplier's logo, or when your sector imposes specific compliance requirements on the audit trail that off-the-shelf packages cannot meet. For these situations, we build platforms that work within your deal process rather than around it.
Our clients are typically corporate finance firms, M&A advisers, private equity firms, property investors, notary offices and banking departments that regularly facilitate due diligence. They have outgrown ad hoc data rooms and want a platform where their deal team, their clients and counterparties collaborate securely, under their own brand and with audit capabilities that are stricter than the standard logging functionality of most SaaS providers.
The right choice depends on what the platform needs to do and how deeply it must integrate with your working process. In an initial conversation, we will advise which option suits your deal volume and compliance profile.
A secure document vault in which you open files for a single deal or a handful of parallel deals. Single sign-on, multi-factor authentication, per-user watermarking, view-only mode and an audit log as standard. In your own house style and on your own URL, rather than under the logo of a SaaS provider.
For corporate finance, M&A firms and private equity businesses managing several engagements in parallel. One platform stack, with a dedicated workspace per deal, its own access controls, its own Q&A workflow and its own audit log. A central dashboard for your deal team, with separate environments for sellers and bidders.
A mission-critical due diligence platform with deep integrations, AI-augmented document classification, automatic redaction of personal data, white-label delivery per client and sector-specific workflows for medical, defence or financial sectors. Suitable for banking departments, notarial networks and international advisory groups serving multiple languages and jurisdictions.
Alongside research during a transaction, there is an ongoing obligation: screening of relationships against sanctions lists. See Sanctions compliance software.
Sanctions screening often runs through this process, and it has a set moment of its own: just before the transfer, when you can still stop. See the app for transaction sanctions checks.
Every due diligence platform is a combination of standard building blocks that we configure specifically for your deal process. You choose which modules are in scope. Most projects start with the vault and permissions, then expand sprint by sprint to Q&A, redaction and AI features.
All deal documents in one place, with version history, automatic metadata extraction and retention periods per file. Counterparties always see the latest version, while your deal team can go back to any earlier version and every change.
Access by user, by group, by folder and by document. A buyer sees the financial folders, legal counsel sees the contracts, a tax adviser sees the tax documents, and none of them see each other's material. Temporary access with an automatic expiry date is standard.
Every document that is opened automatically receives a watermark with the viewer's name, email address and time of access. This makes it possible to trace afterwards who leaked a document. View-only mode prevents downloading altogether.
Who opened which document and when, how long they viewed it, which page they stopped on, and what they downloaded, shared or printed. The audit trail is recorded immutably and can be exported as compliance evidence for regulators, auditors and legal counterparties.
Bidders ask questions at document or dataroom level, your deal team triages internally to the right expert, answers on behalf of the seller, and publishes the answer to one bidder or to all bidders equally. Audit trail of who asked what and when.
Personal data, customer names, salaries or strategic figures are blacked out, manually or automatically, before the document becomes visible to the counterparty. The original version remains available to your deal team; the filtered version is shown to bidders.
For large datasets, the platform automatically generates summaries of contracts, classifies documents by type (lease agreement, NDA, IP assignment, employment contract) and flags missing documents. For reviewers it complements manual work rather than replacing it.
At the end of the deal you export the complete dataroom as a signed data pack: all documents plus the full audit trail in one PDF set. For the sale archive, for the notarial deed, for the bank guarantee.
A due diligence platform is not one-size-fits-all. The deal process of a corporate finance adviser differs fundamentally from that of a property investor or a bank department. We know the patterns per sector and build the platform around them.
The classic M&A flow: a seller opens a data room, several bidders receive phased access, and the deal team of a corporate finance firm guides the process. We build platforms for M&A advisers who run multiple transactions as a matter of course, not for one-off sales where you would be better off renting iDeals for a week. Custom development pays off once you want to define your own brand and workflow.
For property investors and large portfolio transactions, we build platforms where each property gets its own sub-file containing land registry documents, lease agreements, environmental reports, valuations and maintenance history. Bidders review at property level and can filter by rental yield, location or year of construction, which suits large-scale property reviews where hundreds of assets are examined in parallel.
For banking teams that routinely support due diligence in lending, syndicated loans or regulatory investigations, the audit trail is the core functionality, not the document vault itself. We build platforms where every action is logged immutably and the log is readily available for later review by the DNB or your external auditor. Can be combined with KYC and AML compliance software if you already use it.
A production-ready due diligence platform, plus everything needed to run it yourself or have us run it for you. No black box, and no dependence on a single supplier.
With OneDayBuild, we turn your idea into something tangible in one day for €1,150, so you can see whether further development is worth the investment. Decide to go ahead with the full build? Then we credit the full cost.
Explore OneDayBuild →Six situations in which a custom due diligence platform pays for itself compared with a standard SaaS data room. If one of these sounds familiar, we would be happy to talk further.
A corporate finance firm, M&A adviser or private equity house that manages two to five transactions in parallel each month. Setting up a SaaS data room from scratch each time takes time, and your deal team ends up spread across different interfaces.
Which platform offers audit trails deep enough for your compliance officer or regulator? We build immutable logging at page level, including view duration and print actions, going further than most standard packages, which stop at document level.
Your bidders and clients experience the platform as yours, not as Intralinks or Datasite with your logo added. Your own domain, your own colours and your own tone of voice in the interface, with no white-label branding that dilutes your brand.
For medical acquisitions (NEN 7510 horizon), defence-related transactions (ITAR classification) or financial institutions (DNB supervision), standard data rooms are too generic. We build flows that encode your sector-specific rules into the software.
You deliver the data room as part of your service: your client sees the portal under their own brand, while you run a single platform stack behind the scenes. For accountancy and law firms offering deal support alongside their core services.
Automatic classification of thousands of documents across a large portfolio, AI summaries per contract, automatic redaction of personal data: capabilities most SaaS providers do not yet offer, or offer only in a limited way. We build these as a separate layer on top of your existing document vault.
A conversation in which we understand which deal types you support (M&A, property, fundraising, banking), what volumes you handle, which compliance requirements apply and which standard package you use now, or why you no longer find it sufficient.
A workshop with your partners and deal team lead, plus interviews with some recent bidders and clients. At the end: a concrete scope, timeline, initial screen flow, list of integrations and a conceptual audit trail structure.
A working build every two weeks that you and your deal team can test. We usually start with the document vault, permissions and audit log for one deal type. Q&A, watermarking, redaction and AI features are then added sprint by sprint.
Before the wider rollout, we put the platform live for one real deal that you are already advising on. We gather feedback from your deal team and the counterparties, remove friction, and only then move all new projects onto it.
Phased rollout of new deals on the platform, decommissioning of the old SaaS environment, and an onboarding template for your deal managers. Ongoing management of security, integration maintenance and compliance updates whenever regulatory requirements change.
The questions that partners and deal team leads usually ask us before a project begins.
A free, half-hour introductory call. We listen to your deal flow, probe your compliance requirements, and give direction on whether a custom build makes sense in your situation, or whether a standard package will still suffice for now.
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