Sidian DataGuard

Prevent data leaks
before they happen.

Every document shared internally, externally, or with AI is checked, protected, and tailored to the recipient before it leaves your firm.

Nothing confidential leaves. We prove it.
Your data
OneDrive
SharePoint
Google Drive
Outlook
Gmail
0 in flight
DataGuard
1. Find
entity recognition
2. Decide
your policy
3. Remove
redact · scope
Who sees it
Reviewer
Paralegal
AI assistant
Client
Counsel
Audit log · live
waiting for first event…

Find · decide by your policy · remove & record · on every share

Microsoft Partner
MaRS Discovery District
Available on Microsoft Marketplace

Built for organizations where the wrong data escaping can mean privilege waiver, regulatory penalties, or lost client trust.

The difference

We don't block the document.
We remove what shouldn't be in it.

Traditional DLP✕ blocks
  • Stops work
  • Blocks employees
  • Creates IT tickets
  • Frustrates everyone
DataGuard✓ governs
  • Applies your data policy automatically
  • Removes only what shouldn't leave
  • Lets work continue
  • Records everything
< 1s
policy check on every send
0
data sent to outside AI services
Every
decision logged & audit-ready

Share the work, not the privilege.

Everywhere your work goes

Wherever your documents go, the confidential parts don't.

Your firm's policy, applied automatically the moment anything moves. The sensitive parts come out. The rest goes through.

01

Your team

One client file, many people: associates, paralegals, contractors, co-counsel. Each sees only the parts their role allows. The rest is removed from their view. Nobody sees everything.

02

AI tools

Your team can use AI. DataGuard strips the confidential and privileged parts before anything reaches a chatbot or model. You get the speed without handing over the file.

03

The outside

Clients, opposing counsel, vendors, experts. Every share goes out with the confidential and privileged parts removed, scoped to whoever receives it. The send just completes.

All three are live today, across the tools your team already uses.

Live in an afternoon, no IT project
Runs in the tools you already use
Your team works exactly as they do now
Nothing ever sent to outside AI
We prove it

Every removal,
on the record.

Each share carries a record of what was removed, why, and for whom: a tamper-evident log you can't quietly edit. If a client, a regulator, or opposing counsel ever asks what left your firm, you have the answer.

What was removedWhy, and under which ruleWho received itTamper-evident

Courts forgive an honest mistake only if you can show you took reasonable steps. The record is that showing.

Built for the standards your firm answers to.

HIPAAGDPRCCPA / CPRAGLBASOC 2ABA Rule 1.6FRE 502(b)
Why we built this

FAQ

Purview blocks the email and tells you afterwards what was wrong. DataGuard removes the parts that shouldn't go out and lets the send complete. Your team isn't held up. The recipient sees only what was meant to go.

Yes. DataGuard sits in front and removes the confidential and privileged parts before anything reaches the AI. Your team gets the speed without handing over the file.

Privileged passages are a protected category. They're held back on external shares and on AI, and every hold is recorded with its basis.

Nowhere new. Your files stay where they already live: Clio, OneDrive, SharePoint, Drive. DataGuard sits between your people and your data, stores nothing of its own, and sends nothing to outside services. No OpenAI, no Anthropic.

Try it. Or let us show you.

Run DataGuard on a real document and watch a redaction and its record appear. Or book time with our team to see it on your own files.

No setup. See a redaction and its record in under a minute.