01
Your data stays where it is.
Files don't move out of Clio, OneDrive, SharePoint, or Drive. Sidian sits between your data and the outside world, checking everything on its way out.
Sidian DataGuard
Finds sensitive data, redacts it, stops leaks.
Automatically.
Your files stay where they live. Anything going out gets reviewed by your policies and a human, redacted, and logged. So nothing private leaves by accident.
Microsoft Partner
MaRS Discovery District
Available on Microsoft Marketplace
Watch it work
How it works
Watch a document go out.
Every doc on its way out gets reviewed, redacted, and logged — automatically. No bottleneck. No “wait for the privacy team.” Sidian does the redaction step for every employee, so the document still goes out on time.
Audit log · live
waiting for first event…
Inside
Clio
OneDrive
SharePoint
Drive
Outlook
0 in flight
Sidian Firewall
1. Policy check
HIPAA · CPRA · GDPR
2. Human review
approve / edit
3. Redact
apply edits
Outside
Court
Opposing counsel
Regulator
Insurer
Partners
Audit log · live
waiting for first event…
No slowdown·Every employee a privacy expert·Redaction automated
How it works
Three steps from inside
to safely outside.
02
Anything going out is reviewed.
DataGuard checks every send against your privacy laws (HIPAA, CPRA, GDPR, etc.). A human approves the edits. Then redactions are applied automatically.
03
Sent clean. Every step logged.
The recipient gets the redacted version with a summary of what was removed and why. You get a complete record: every send, every redaction, every recipient action.
Built for firms with private client info.
One system. Different rules per industry. The same complete record.
LAW FIRMS
ABA Rule 1.6 · State Bar duties
$50–150 / hr
paralegal cost per page reviewed by hand
Documents going to opposing counsel, evidence sets, anything with client info. The judgment calls stay with the lawyer. The routine cleanup doesn't.
Learn more →
HEALTHCARE
HIPAA · 45 CFR §164
$1.5M
average HIPAA breach penalty per incident
Patient records, referral letters, billing exports. Bulk redaction with the law cited on every removal.
FINANCIAL SERVICES
GLBA · CPRA · state breach laws
$1B+
in CFPB penalties in 2024
Regulator requests, customer records, exam responses. Every redaction tied to the rule that triggered it.
Common questions.
Purview blocks emails and tells you afterwards what was wrong. DataGuard removes the private info and lets the email send anyway. Your team isn't held up. The recipient sees only what was meant to go.
Your files stay in the folders they already live in: Clio, OneDrive, SharePoint, Drive. Sidian sits between your data and the outside world. We don't move files out of your environment. We don't send anything to outside services (no OpenAI, no Anthropic).
When something private is flagged, your reviewer sees what was found, the rule that triggered it, and a one-click approve / edit / override. Routine items can be set to auto-approve. The audit log captures both engine decisions and human overrides.
No. For everyday email, the check happens in well under a second when you hit send. For larger document sends, you set the policies once and DataGuard reviews and redacts every send going forward.
PDF, Word, PowerPoint, Excel, CSV, JSON, plus the body of the email itself.
98% on the things firms actually need to redact: names, dates, organizations, account numbers, and IDs. Tested on real legal and healthcare documents, not generic text. The remaining 2% comes up in the human review pass.
Most firms run their first protected send within an hour. Connecting to your existing tools is the longest step.
No. Sidian DataGuard works inside Clio, OneDrive, SharePoint, Drive, and Outlook. Your folder structure doesn't change. Your team works the same way as before.
See it run on your own document.
Twenty minutes. We'll walk through your real tools, your real policies, and what setup looks like.