About Custos
AI security from Sophrono, the AI implementation firm. The engineers who review your AI tools and test your AI systems design and ship AI systems for clients.
The name
Who guards the guardians?
Custos is Latin for guardian. The Roman poet Juvenal asked who guards the guardians. It is still the right question to put to any security provider.
Our answer is evidence. Every test is authorized in writing, every finding is shown so your engineers can check it, and every report says what was not tested as plainly as what was.
A Sophrono service
Tested by people who build AI.
Sophrono is an AI implementation firm. Its engineers design and build AI systems around business logic, trusted data, and human authority.
Custos applies that knowledge to security: where AI tools send data, and how AI systems break. The engineers who know how these systems are built know where they fail.
Fit
When Custos helps, and when you need someone else.
A good fit
- Staff use AI tools and nobody has an inventory
- You need an AI policy staff will follow
- You ship a chatbot, assistant, or AI agent
- A customer, auditor, or insurer is asking about AI
Not the right service
- A full network or application penetration test
- 24/7 detection or incident response
- A compliance certification or legal opinion
What we need from you
- A named owner who authorizes the work
- Read-only access, or a test environment
- An administrator or engineer to work with
- Time to review findings and decide
What you can expect
Published prices and written limits.
- Published prices: the shadow AI review at $2,500, policy and controls at $4,500
- Scope and authorization in writing before any work
- A reply by email within two business days of receipt
- Every finding reviewed by a second engineer
- No claim that anything is free of weaknesses
Each engagement is confirmed by a written engagement letter. Testing of any system happens only under a signed authorization and rules of engagement.
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