When you reach the stage of choosing a virtual data room (VDR) for an M&A transaction, you typically have two very different kinds of platforms on the shortlist. Datasite Diligence – the platform formerly known as Merrill DataSite – is the legacy heavyweight built specifically for high-stakes M&A. Govern 365 is the Microsoft 365-native alternative that keeps every deal document inside your own tenant.

Both can run a deal. They get there in very different ways, with very different cost profiles, very different security models, and very different consequences for your data after the deal closes.

This guide compares them honestly on the eight dimensions that actually decide an M&A VDR purchase: data architecture, pricing, setup speed, security, AI capabilities, Q&A and audit workflows, post-deal archiving, and total cost of ownership over the life of the engagement.

Quick answer: Datasite Diligence is the established enterprise M&A VDR with mature deal-team tooling, AI-powered redaction, and global support – billed primarily on a per-page basis with custom enterprise quotes. Govern 365 delivers the same M&A deal workflows (Q&A, watermarking, audit, deal bible, closeout) entirely inside your existing Microsoft 365 tenant, with flat-rate annual pricing, unlimited users, unlimited storage, and no archive fees. Datasite is the right choice for one-off mega-deals with dedicated banking advisors. Govern 365 is the right choice for organizations that run multiple deals a year on a Microsoft 365 foundation and want predictable spend with no data exfiltration.

If you’ve already decided to leave Datasite, the Datasite Alternative page covers the switch case directly – including a savings calculator and migration overview. This guide is for the comparison stage before that decision.

Datasite and Govern 365 at a Glance

Datasite product details summarized from publicly available sources; pricing has not been independently verified and is subject to change.

Data Architecture: Where Does Your Deal Data Actually Live?

The first decision is not about features – it’s about where the bidders, advisors, and counsel will be reading your most sensitive documents.

Datasite

• All deal documents are uploaded into Datasite’s cloud platform.
• Files leave your security perimeter and live in a third-party SaaS environment for the duration of the deal – and beyond, if you keep them archived there.
• Identity is managed by Datasite (separate accounts, separate MFA, separate session policies) on top of whatever your bidders and advisors already use.
• Compliance reviews must cover Datasite as a sub-processor – relevant for cross-border deals where data sovereignty matters.

Govern 365

• Every deal document stays inside your existing Microsoft 365 tenant – specifically in SharePoint Online sites that Govern 365 provisions, governs, and audits.
• No file ever moves to a vendor-owned cloud. Your data sovereignty boundary is unchanged.
• Identity is managed by Entra ID (formerly Azure AD), including conditional access, MFA, and B2B guest invitations you’ve already configured.
• For organizations with strict cross-tenant rules, Govern 365 includes a Vault layer that lets external bidders access deal content even when their own tenant blocks B2B logins to other Microsoft 365 environments.

Verdict: If your deal involves regulated industries, cross-border jurisdictions, or simply a security team that has already accredited Microsoft 365, Govern 365 removes the duplicate-governance tax of bolting a third-party silo onto every deal. Datasite is the choice when you genuinely do not want the data in your tenant – for example, a sell-side engagement where the seller wants the bank to host the room.

Govern 365 has streamlined our workflow, allowing secure collaboration and fast sharing of sensitive files with external partners. Its flexibility, clear pricing, and integration with SharePoint make it an ideal solution for our business needs.

Alex Friend
Head of Business Intelligence & IT

Pricing: Per-Page Premium vs. Flat-Rate Predictability

Pricing is where these two platforms diverge most dramatically – and where the surprises tend to hit M&A teams late in the deal.

Datasite Pricing

Datasite does not publish prices. Based on publicly available reviews and third-party research:

• The headline model is per-page, with public benchmarks placing it in the $0.40 to $1.00 per page range, often combined with custom enterprise quotes.
• Costs scale with document volume, file type, project duration, and user count.
• Common line items that appear on Datasite invoices include surcharges for non-PDF files (Excel, media), timeline extensions, additional user seats, training and implementation, and premium tier features such as advanced AI redaction.
• Annual enterprise quotes commonly run from the low five figures into six figures for document-heavy deals.

Govern 365 Pricing

Govern 365 publishes its pricing openly:

• Flat annual subscription based on the number of active data rooms you want to run in parallel.
• Unlimited users on every edition – invite 10 bidders or 1,000 advisors without changing your bill.
• Unlimited storage on every edition – files live in your tenant, so there is no per-GB charge.
• Editions: Founder (1 VDR), Team (5 VDRs), Growth (15 VDRs), Corporate (35 VDRs), and Enterprise (unlimited VDRs).
• No per-page fees, no archive fees, no time-extension surcharges.

How much cheaper is Govern 365 than Datasite? 
Datasite charges per page with custom enterprise quotes – total cost often runs into five or six figures per deal. Govern 365 charges a flat annual fee for unlimited users and unlimited storage across a fixed number of concurrent data rooms, with no per-page, per-user, or per-GB charges. For document-heavy or multi-deal organizations, the difference frequently exceeds 70%.

Verdict: Datasite’s per-page model is workable when document volume is known and capped – typical of a single, banker-led transaction. Govern 365’s flat-rate model wins anywhere page count is unpredictable, the deal might extend, or the organization runs multiple transactions per year. See the VDR Switch Calculator to model your specific deal.

Setup Speed and Deal Mobility

In M&A, time-to-data-room is often measured in days, not weeks – but the gap between “we signed the engagement letter” and “bidders are in the room” varies enormously between platforms.

Datasite

• Project rooms are typically configured with help from a Datasite project manager.
• Once configured, drag-and-drop upload is fast and well-reviewed, and the platform supports rapid bulk uploads.
• For most deals, full configuration – folder structure, permissions, branding, Q&A workflows – takes a small number of business days.

Govern 365

• Rooms are self-provisioned by an authorized user from a template catalog. A new M&A VDR can be live in under 90 minutes without a vendor ticket.
• Folder structure, permissions, watermarking, audit, and Q&A are pre-configured in the template, so your deal team is not building from a blank room.
• Templates can be standardized across the organization, so every M&A engagement starts from the same governed baseline.

Verdict: For a one-off transaction where you want a project manager handling setup, Datasite’s white-glove model is convenient. For repeat deal-makers – corporate development teams, PE platforms, law firms – Govern 365’s template-driven self-service shortens every subsequent room and standardizes governance.

Security and Compliance Architecture

Both platforms are secure. The difference is whose security model is doing the work.

Datasite

• Maintains its own enterprise security stack with ISO/IEC 27001 certification and SOC 2 Type II attestation.
• Encryption, granular permissions, watermarking, immutable audit logs, and DRM are all built into the platform.
• Your organization’s security team must review and accept Datasite as a sub-processor – including how it handles encryption keys, regional data residency, and breach notification.

Govern 365

• Inherits your tenant’s security and compliance posture directly. If your Microsoft 365 environment is configured for GDPR, HIPAA, ISO 27001, FedRAMP, SOC 2, or any other framework, your data room is too.
• Files are protected by Microsoft Purview sensitivity labels and DRM that travel with the document – so even if a bidder downloads a file, the protection persists.
• Access is governed by Entra ID conditional access and Microsoft Defender policies you’ve already configured.
• Govern 365 is zero-knowledge – the vendor cannot read your files, and Govern 365 staff have no back-end path into your tenant.

Is Govern 365 as secure as Datasite?
Govern 365 is at least as secure as Datasite because it inherits your existing Microsoft 365 security controls – Entra ID, Microsoft Purview, and Microsoft Defender – rather than asking you to trust a separate vendor stack. Files never leave your tenant, sensitivity labels and DRM travel with every document, and your audit trail lands in the same Purview environment your security team already monitors.

Verdict: Datasite asks you to trust its proprietary security. Govern 365 asks you to trust the Microsoft security investment you’ve already made. For Microsoft 365-heavy enterprises, the second model removes a sub-processor, a separate identity store, and a parallel compliance surface to manage.

AI and Automation in the Data Room

AI features have become the defining marketing message for VDRs in 2026 – and the cost gap between platforms widens fast here.

Datasite

• Datasite Redaction AI automatically identifies and redacts PII across multiple jurisdictions, with color-coded redaction reasons and selective un-redaction.
• Smart Indexing builds folder structures directly from due diligence trackers and syncs them with the index.
• Machine learning models trained on 3 million+ documents support classification and auto-tagging.
• Advanced AI tooling typically sits in premium tiers or as separately priced modules.

Govern 365

• Leverages Microsoft Purview for automatic discovery, classification, and protection of sensitive content – using policies your organization has already authored.
• Uses Azure AI services applied directly against files in your tenant, so AI processing happens inside your security boundary rather than in a vendor cloud.
• No separate AI subscription – capabilities scale with whatever Microsoft AI tier you already license (Copilot, Purview Premium, Azure OpenAI).

Verdict: Datasite has the more productized AI experience – a polished M&A-specific surface for redaction and indexing that requires no other infrastructure. Govern 365 has the more governance-aligned AI experience – using your own Microsoft AI investment with your own sensitivity labels, so AI does not become another silo to govern. Microsoft 365 enterprises that have already paid for Purview and Copilot are paying twice when they also buy Datasite’s AI tier.

Q&A, Audit, and Closing Bible Workflows

These are the workflows that separate a real M&A VDR from a generic file-sharing tool.

Datasite

• Integrated Q&A module with structured threads, role-based routing, and SLA tracking – well-regarded by deal teams, though reviewers consistently note a learning curve.
• Granular engagement analytics – who opened what, when, how long, and from where.
• Datasite Archive captures a permanent snapshot of the room at deal close. Datasite has indicated Archive is bundled with Diligence and Acquire projects in recent packaging.

Govern 365

• Structured Q&A management with routing, approval workflows, and full audit trail – published as part of the standard data room template.
• Deal-context audit that surfaces SharePoint and Microsoft Purview logs inside the deal workspace, with a one-click export to an Excel or PDF closing bible.
• Lifecycle automation for expiration, access reviews, archival, and tenant-resident retention – no archive fee, because the data stays where it already lives.

Verdict: Datasite’s Q&A module is more mature and more opinionated, which deal teams may prefer when they want a single way of doing things. Govern 365’s Q&A and audit feel native to Microsoft 365 – the audit log is the same one your security and compliance teams already use, which lowers operational overhead.

After the Deal Closes: Archive Costs vs. Tenant-Resident Retention

This is the line item M&A teams underestimate most.

Datasite

• Historically, closing a deal meant either exporting an archive (often onto an encrypted USB, which several public reviews price at around $1,500 per device) or paying for ongoing Datasite Archive access.
• Datasite has since moved Archive into the standard Diligence and Acquire packaging, which improves the value but does not remove the dependency – your closed deal records still live on Datasite’s infrastructure.

Govern 365

• When the deal ends, the data stays in your SharePoint tenant – governed by your existing retention, eDiscovery, and lifecycle policies.
• No archive subscription. No off-boarding migration. No data ever to retrieve from a third party.
• Permissions are automatically revoked or transitioned to a closed-deal posture; the audit trail remains accessible inside Purview.

What happens to deal data after an M&A transaction closes? 
With Datasite, deal records either remain on Datasite’s platform (often with an archive subscription) or are exported to an encrypted physical archive. With Govern 365, the data simply remains in your Microsoft 365 tenant under your existing retention policies – there is no archive vendor relationship to maintain after the deal closes.

Verdict: This is one of the cleanest illustrations of the structural difference between the two platforms. Datasite charges you to host your data; Govern 365 charges you to govern it.

Datasite vs Govern 365: Feature Comparison Table

When to Choose Datasite vs Govern 365

Datasite is the right choice if you:

• Are running a bank-led, multi-billion-dollar transaction where the seller wants the room hosted by a third party for arms-length reasons.
• Need dedicated 24/7 deal-team support across 20+ languages for a global cross-border deal.
• Operate in a market where bidders and advisors expect Datasite by name and you want zero friction on counterparty onboarding.
• Do not run M&A on Microsoft 365 today and have no plan to standardize there.

Govern 365 is the right choice if you:

• Already standardize on Microsoft 365 and want to leverage the security, identity, and compliance you’ve already paid for.
• Run multiple deals per year – corporate development, in-house M&A teams, PE platforms, law firms with recurring deal flow.
• Need predictable, flat-rate spend and have been burned by per-page or extension surcharges in prior deals.
• Care about data sovereignty – keeping deal data inside your tenant, your geo, and your existing audit perimeter.
• Want a single governance backbone across M&A, board, IP, audit, and partner collaboration — not separate platforms for each.

Ready to model the switch? Start with the Datasite migration overview and the VDR Switch Calculator.

Make the Switch from Datasite to Govern 365

If you’re approaching renewal – or staring at a Datasite invoice for a deal that grew beyond the original page estimate – there’s a direct path to cutting cost and reclaiming data sovereignty.

• See the dedicated Datasite Alternative page for a side-by-side switch case.
• Model your savings with the VDR Switch Calculator.
• Request a Demo to see Govern 365 provisioned in your own tenant.

Frequently Asked Questions

Disclaimer

This comparison summarizes publicly available information about Datasite Diligence. Datasite product packaging, pricing, and capabilities may change at any time and have not been independently verified. For authoritative product detail, refer to Datasite’s official documentation. Govern 365 capabilities described here are current as of publication.