Pricing
One firm price, starting at $999.
Firms of up to 50 people pay $999 a month, and the fee steps up by size from there. Lawyers, paralegals and staff all included.
Up to 50 people
Small firm
$999
DataGuard, per month
51 to 100 people
Mid-size firm
$4,000
DataGuard, per month
101 to 250 people
Regional firm
$16,000
DataGuard, per month
251 to 500 people
National firm
$50,000
DataGuard, per month
More than 500 people? We price larger firms directly.
Talk to usAdd-on
Add Private AI to your plan
Your firm's own copy of an open-weights model, on a machine only your firm uses, with Sidian Chambers on top. Tell us your size and we will price it with you.
- Available at every band
- Set up and run by Sidian, nothing to install
- Priced on the same call as DataGuard
Your firm's plan
- DataGuard
- from $999 a month
- Private AI
- Priced with you
Per firm, not per seat
Everyone in. Nobody counted.
One price covers the whole firm, set by how many people work there.
Everyone counts
Lawyers, paralegals and staff all count toward the band, and all of them get access.
No seats to manage
Nobody hands out licences or decides who gets one.
New hires cost nothing
Hiring inside your band adds nothing to the DataGuard bill.
Included
Same product at every size.
The band sets the price and nothing else. Private AI adds your firm's own model, on a machine only your firm uses.
DataGuard
Every band- Checks every email and attachment before it sends
- Sends hundreds of files outside the firm at once
- Lets AI work on real matters through the AI Vault
- Cites the rule behind every proposed removal
- Keeps a record of every send, approval and change
Private AI
Add-on, any band- Your firm's own copy of an open-weights model
- One machine, rented through Sidian, used by your firm alone
- Sidian Chambers on top
- Set up and run by Sidian
- Matter
- Avery v. Northline
- Filed
- 14 Mar 2026
- SSN
- SSN removedCPRA §1798.140(v)
- Account
- Account removedGLBA
Claimant reports the fall at 6:40pm.
- Matter
- Avery v. Northline
- Filed
- 14 Mar 2026
- SSN
- 412-55-0190
- Account
- 4829-1145
Claimant reports the fall at 6:40pm.
Our exposure is worse than the client believes.
How we earn it
Every move, provable.
We don't move your files
DataGuard reads your files where they already live and never keeps a second copy.
Private detection models
DataGuard finds what is sensitive with Sidian's own private models. Never OpenAI, never Anthropic. Never trained on your data.
Audit-ready by default
Every proposal, approval and send is recorded as it happens. The compliance file writes itself.
Questions
Before you buy.
Everyone at the firm: lawyers, paralegals and staff. The band is set by headcount, so there are no seats to count and nobody is left without access.
See your own documents redacted, live.
Bring one real document. 15 minutes. We'll price your firm on the call.