Castile Security

Castile AI Guardrails

Use AI.
Keep your data yours.

AI governance from Castile Security. We identify AI tools touching your company data, set the rules, set up controls in the Microsoft 365 tools you already pay for, and show you the evidence every quarter.

From $1,000 to start, with a fixed-price assessment.

Based in El Paso. Serving businesses nationwide.

What you get

Four questions
you can answer.

Your team is already using AI. The risk is sensitive data, like patient records, client files and financials, ending up with a company you don’t have an agreement with. We don’t ban AI. We make sure you can answer these four questions, today and every quarter.

The questionHow we answer it
Which AI tools are touching your company data?We identify AI tools through Microsoft 365 activity, connected applications and staff responses, then document what was and wasn’t checked.
What can your team safely put into them?We map where your sensitive data lives and which AI uses are permitted, restricted or prohibited, and give staff a “never put this in a prompt” card.
Who approved those tools?An approved tool list, an agreement and data-handling check for every AI vendor we identify, and approval required before apps connect to company data.
Can you prove it when a client, insurer or regulator asks?A quarterly report with the same six sections every time: tools found, approved and blocked, changes, coverage gaps, and next actions.

How it works: six stages

Setting up a control is not the same as enforcing it. Every rule starts by warning, and blocks only after your control owner approves.

Assessment

Identify AI tools and where your data is exposed.

Policy and initial setup

Write the rules. Set up controls in warn mode.

Warn-mode observation

At least 30 days of warnings, reviewed with your control owner.

Owner approval

Your control owner approves blocking in writing.

Block-mode enforcement

Blocking turned on where devices and licenses support it.

Quarterly evidence

The same six-section report, with trends from quarter two.

Controls are set up where your devices, licenses and Microsoft 365 services support them. Anything outside that is listed as a coverage gap in every report.

Controls may be unavailable during Microsoft, vendor, network, or client-system outages. Castile will document the interruption and include any resulting coverage gap in the next report.

Fixed prices. Clear deliverables.

Priced up front, not by the hour. Anything outside these deliverables is a fixed-price add-on.

Start here

AI Risk & Readiness Assessment

Which AI tools we identified, where sensitive data is exposed, and what must be fixed before your team expands AI use.

From $1,000 one time, up to 25 users

Larger teams quoted.

  • AI tools identified through Microsoft 365 activity, connected apps and a staff survey
  • SharePoint, OneDrive and Teams sharing reviewed
  • Where your sensitive data categories live
  • Managed and unmanaged devices identified
  • Agreement and data-handling check for every AI vendor identified
  • Findings report with coverage gaps, and a review call

Target: findings within 10 business days after we receive access and staff responses.

Next step

AI Governance Implementation

Your rules written and the first controls set up in warn mode.

$2,000 one time

  • AI acceptable use policy and approved tool list
  • Permitted, restricted and prohibited AI uses by data category
  • Vendor approval process and staff sign-off
  • “Never put this in a prompt” card for staff
  • Approved AI tool configured according to the vendor’s available data-use and training controls, with the configuration documented
  • App connection approval and data loss prevention rules, in warn mode

Findings stay current for 30 days. Start within 30 days to move straight into Guardrails; a later start begins with a fixed-price findings refresh.

Project

Copilot Readiness

Turn on Microsoft Copilot without exposing files people shouldn’t see.

$2,500 up to 25 users. $4,000 for 26 to 50.

  • Files shared too widely found and fixed
  • Sensitivity labels on your key libraries
  • Pilot group rollout with user guidance
  • Access check after rollout

Prices as of November 2026.

How we work together

Clear scope.
Clear owners.

One requirement: you name an internal control owner for AI decisions. Castile runs the controls. Your owner makes the business calls.

Assessment coverage

  • Microsoft 365 activity reviewed
  • Connected applications reviewed
  • Staff survey completed
  • SharePoint, OneDrive and Teams sharing reviewed
  • Managed and unmanaged devices identified

What it can miss. AI tools not visible through these sources, such as personal devices or browsers we don’t manage, may be missed. The report lists what was and wasn’t checked.

What we need from you. Access, approvals and staff responses by the date we set at kickoff. The 10-day target starts when we have them.

Data classification means identifying where your defined sensitive data categories reside and mapping which AI uses are permitted, restricted or prohibited. It is not a guarantee that every file is automatically classified.

ResponsibilityOwner
Business decisions and risk acceptanceYour control owner
Legal reviewYour legal counsel
Staff participation: survey, training, sign-offYou
License purchasesYou, with our advice
Device enrollmentYou approve; we enroll devices we manage
Remediation approvals and policy exceptionsYour control owner
Accuracy of AI-written contentYou
Assessment, policy drafts, control setup, monitoring, reports, exception registerCastile

Exceptions

Every exception records the tool or workflow, business reason, data involved, risk decision, approver, expiration date and review date. No permanent exceptions: each one expires and is reviewed quarterly.

Changes

New AI tools, workflows, connected apps, entities, unmanaged devices and remediation outside scope are quoted as fixed-price add-ons first. Complete AI tool requests receive a written decision within five business days, excluding time waiting on the client, vendor, legal counsel, Microsoft, or other third parties.

What this is not

We don’t build AI tools or custom software, and we don’t guarantee that no data will ever leak or that you’ll be approved for insurance. AI decisions about people, such as hiring, lending or tenant screening, are referred to your legal counsel. Your team stays responsible for checking AI-written content.

Before we talk

Straight answers.

Want to know where your business stands with AI today? A 30-minute call is the fastest way to find out what the assessment would cover.

Book a call
Are you going to ban AI at our company?

No. We don’t ban AI. We make sure you can answer four questions: which AI tools touch your data, what your team can safely put into them, who approved them, and whether you can prove it. Your control owner makes the business calls.

What can the assessment miss?

We identify AI tools through Microsoft 365 activity, connected applications and staff responses, then document what was and wasn’t checked. Tools not visible through those sources, such as personal devices or browsers we don’t manage, may be missed, and the report says so.

How long does the assessment take?

Our target is findings within 10 business days after we receive access and staff responses. We set the date for those at kickoff, and the 10-day target starts when we have them.

Do we need a Castile managed plan?

No. Castile AI Guardrails begins after AI Governance Implementation, or after we review and accept your existing AI policy and control configuration. No other Castile plan is required.

When does blocking start?

Only after a rule has run in warn mode for at least 30 days, we have reviewed the warnings with your control owner, and your owner approves blocking in writing. Blocking is turned on where your devices are enrolled and your licenses support it. Where they don’t, the rule stays in warn mode and the quarterly report says so.

Does this guarantee our data never leaks, or that we get approved for cyber insurance?

No. Nobody can honestly promise either. What you get is controls set up where your devices, licenses and Microsoft 365 services support them, an honest list of coverage gaps, and quarterly evidence you can show a client, insurer or regulator.

What happens when someone wants a new AI tool?

They send a request with the tool, who will use it, what for, and which data is involved. Complete AI tool requests receive a written decision within five business days, excluding time waiting on the client, vendor, legal counsel, Microsoft, or other third parties.

Start with the AI Risk & Readiness Assessment.

Find out which AI tools are touching your data and what needs fixing first. From $1,000, up to 25 users. Prefer the phone? Call (915) 995-2495.