Every small and mid-size firm hits the same fork eventually. The file server is full, matters are scattered across shared drives and inboxes, and someone asks why the firm does not simply use SharePoint, since it already comes with Microsoft 365. Someone else points out that every firm they used to work at ran NetDocuments. Both are reasonable positions.

This is a practical comparison for firms in roughly the five to one hundred lawyer range. It sticks to what each vendor documents officially, skips pricing, and focuses on the five things that decide how a document system feels to work in day to day: how matters are organized, how email gets filed, how ethical walls work, how records are kept, and how AI fits in.

The Short Answer

NetDocuments is a document management system built for legal work. Client and matter workspaces, email filing, and ethical walls exist on day one, because lawyers are the only customers it was designed around. SharePoint is a general-purpose platform that can be shaped into a legal document system, and Microsoft gives you strong compliance tools to do it, but someone has to design and maintain that shape. The real question is whether your firm wants to buy the legal structure or build it.

How Each One Organizes Matters

In NetDocuments, the matter is the unit of organization. Documents, emails, and folders live inside client and matter workspaces, and security policies are applied at the workspace level so they flow to everything inside. A new associate opens a matter and finds the pleadings, correspondence, and filed email in one place without being told where to look.

SharePoint has no built-in idea of a client or a matter. You create that structure yourself out of sites, document libraries, folders, and metadata columns. Some firms make a site per client and a library per matter, others use one large library with matter number columns. Either works if it is planned and enforced. The common failure is a structure that grows organically until search is the only way to find anything and permissions are different in every folder.

Email Filing

Email is where most of a matter’s record actually lives, and this is NetDocuments’ strongest day-to-day advantage. Its email management tools work inside Outlook. They can suggest where to file messages based on sender and content, and a Global Filing Indicator puts a blue checkmark on any email already stored so two people do not file the same thread twice. Outlook folders can be mapped to NetDocuments locations, which means dragging a message into a mapped folder files it automatically. When filing, users can inherit the matter’s default access settings or, if an admin allows it, restrict an email to themselves.

The tradeoff is one more add-in to keep healthy in Outlook. Our support history shows the usual suspects: ndMail login and session errors and the Outlook add-in disabling itself after Office updates. Both are fixable, and both are worth knowing about before rollout.

Microsoft 365 does not include a matter-based email filing tool with filing indicators out of the box. Firms on SharePoint usually save important messages into matter libraries as files, run shared mailboxes per practice group, or buy a third-party filing add-in. That works, but it depends on habits, and habits are what slip during a busy trial month.

Ethical Walls

Conflict screens are non-negotiable for law firms, and the two products handle them very differently. NetDocuments builds ethical walls with access controls at the user, document, and workspace level, and lets authorized users create and apply those security policies inside their own workspaces. Walls are part of normal matter administration.

On the Microsoft side, the equivalent is Microsoft Purview information barriers. Users are grouped into segments, and SharePoint sites get an information barriers mode. In Explicit mode, only users whose segment matches the site’s segments can access and share its content, and anyone outside the segment gets an error. Owner Moderated mode lets the site owner control collaboration between segments that would otherwise be blocked. It is a capable system, but it is designed at the directory and policy level by an administrator, which suits a firm with stable practice groups better than one that walls individual matters weekly. Information barriers is a Purview feature, so confirm your Microsoft 365 plan includes it before you design around it.

Versions and Check-Out

Both systems keep version history and support checking a document out so two people do not overwrite each other. In SharePoint, Microsoft now recommends an automatic version history setting that balances recovery against storage, or you can set manual limits by major version count and age. The admin interface will not go below 100 major versions or a 30-day expiration, and Microsoft warns that going lower through the API risks real data loss.

NetDocuments keeps versions inside each matter workspace, and a checked-out document shows as locked to everyone else so drafts do not collide. The flip side is the occasional stuck lock, which we cover in fixing a NetDocs document locked by another user.

Retention and Records

This is where Microsoft is genuinely strong. Purview offers retention policies, which apply the same rule to a whole site or mailbox, and retention labels, which apply at the document, email, or folder level. Labels travel with content when it moves within your tenant, can start the retention clock from an event like a matter closing, can declare an item a record, and support disposition review with proof of disposition for up to seven years. For a firm with a written records policy, that is a lot of control.

NetDocuments handles retention inside its own governance settings. If your records policy has specific disposition steps, ask for a demo of that exact workflow in both products before deciding. Retention is the area where a missing feature hurts most, years after the purchase.

Security and Compliance

NetDocuments states that its controls are validated by annual independent SOC 2 Type 2 audits and that it deploys all controls identified in ISO 27001, 27017, 27018, and 27701. Customers can choose NetDocuments-managed or customer-managed encryption keys, and the service supports MFA, least-privilege access, and federated identity. The NetDocuments trust center is where to request the actual reports.

Microsoft publishes its own audit reports and certifications through the Service Trust Portal. The platform side is not the weak point for either vendor. With SharePoint, the risk sits in your tenant configuration: sharing settings, guest access, and permissions that drift over time. A legal DMS hands you guardrails; SharePoint hands you the tools to build them.

AI: ndMAX and Microsoft 365 Copilot

NetDocuments’ ndMAX Legal AI Assistant can answer questions across one file or hundreds, generate summaries, chronologies, and translations, and make tracked edits in Word through its agentic editing tool. NetDocuments says repository content is never used to train public models and that AI features respect the same workspace permissions, ethical walls, and data loss prevention rules as the rest of the system.

NetDocuments also now connects to outside AI tools through MCP integrations. Claude, ChatGPT, and Microsoft Copilot can search and retrieve NetDocuments content under each user’s own credentials, with ethical walls and matter restrictions applied automatically. Admins turn this on at the firm level, and documents stay in NetDocuments.

Microsoft 365 Copilot works across SharePoint, OneDrive, Outlook, and Teams through Microsoft Graph. Microsoft states that Copilot only surfaces data a user already has at least view permission to, and that prompts and responses are not used to train the foundation models. That is the right design, and it puts all the weight on your permissions. If a SharePoint library is overshared, Copilot will happily summarize it for anyone who can see it. Clean up permissions before turning Copilot loose on matter files.

Practice Management and Migration

Check integrations before features. Your practice management, billing, and document assembly tools need to talk to whatever holds the documents, and an integration that works for one product may be missing or limited for the other. Ask each vendor for a live demo with your own practice management system, not a slide.

Migration is the cost nobody quotes accurately. Moving from file shares or an older DMS means mapping folders to clients and matters, carrying over metadata where it exists, deciding what to do with years of saved email, and retraining every user. Plan a pilot with one practice group, run old and new side by side for a short period, and only then move everyone.

How to Choose

Lean toward NetDocuments if your firm lives in email, needs matter-level ethical walls set up quickly by staff rather than IT, and does not have someone who will own a custom SharePoint design for years. You are paying for legal structure that already exists instead of designing it.

Lean toward SharePoint if your matters are fairly simple, practice groups are stable, someone on staff or a partner like us can design and maintain the site and permission structure, and your records policy benefits from Purview retention labels. You get more control and fewer separate systems, at the cost of building the legal layer yourself.

Plenty of firms run both. NetDocuments holds the matter record while Microsoft 365 handles email, Teams, and everything outside client files, and the new MCP connection lets Copilot reach into NetDocuments without moving documents. If you are weighing that hybrid, the deciding factor is usually who will support it day to day.

References

Choosing a document system or cleaning up the one you have? Contact Rain City Techworks.