Sirius
Discover
See Your Exposure.Validate What Matters.Know What to Do Next.
The Open Security Experience
The Open Security Experience helps you understand what's exposed, what's actually exploited, and what to do next.
Expert operators, continuous visibility, and operator-built technology.
Discover exposure, validate real risk, see and act on what matters, and keep improving.
Discover
See what's actually there.
Continuously identify assets, vulnerabilities, exposures, and changes. The environment comes into focus.
- Assets come into view
- Vulnerabilities surface
- Exposure becomes visible
Assets · Vulnerabilities · Exposure
Sirius
Validate
Prove what's real.
Finding something is not the same as proving it matters. Aludra keeps what is actually exploitable.
- Theoretical findings recede
- Exploitable exposure holds
- False positives drop away
Many findings → fewer validated exposures
Aludra
See & Act
Know what deserves action.
A validated finding becomes something the organization can move on — not another item on a longer list.
- Evidence lands in Portal
- Priority and owner assigned
- Remediation is visible
Evidence → Priority → Owner → Remediation
Portal
Improve
Prove you're getting stronger.
Open Security does not stop when something is fixed. The work is retested, measured, and run again.
- The fix is remediated
- The fix is retested
- The gain is validated
Remediated → Retested → Validated
RTable
The Open Security Experience
These are not four products.
They are four connected parts of one experience — continuous, not a process that ends.
- Sirius discovers exposure
- Aludra proves what is exploitable
- Portal turns proof into action
- RTable measures the gain
Discover → Validate → See & Act → Improve
Aludra
Validate
Portal
See & Act
RTable
Improve
A finding isn't proof.
A scanner can tell you a vulnerability exists. A report can document it. Neither necessarily tells you whether an attacker can exploit it—or what your team should do first.
That's the gap Open Security was built to close.
One experience. Continuous proof.
Operators uncover and validate real exposure. Technology keeps that intelligence visible, actionable, and connected beyond the assessment.
The Open Security Experience
Expert OperatorsSecurity ServicesOperator-Built Technology
Discover
See what's actually there.
Service work
- Exposure Management
- Vulnerability Assessment
- Attack-Surface Discovery
- Architecture and environment review
- Scoping and asset identification
CVE-2024-21762ExposureIn view
Supporting technology
Sirius
Portal
Validate
Prove what can actually be exploited.
Service work
- Penetration Testing
- Application and API Testing
- Cloud Testing
- Red Team
- Social Engineering
- Adversary simulation
CVE-2024-21762P1Exploitable
Supporting technology
Aludra
Portal
See & act
Know what deserves action.
Service work
- Expert analysis
- Evidence development
- Technical and executive reporting
- Prioritization workshops
- Remediation guidance
- Ownership alignment
CVE-2024-21762P1Assigned
Supporting technology
Portal
Portal
Improve
Prove the fix made you stronger.
Service work
- Retesting
- Security Readiness
- Tabletop Exercises
- Purple Team
- Training
- Continuous Exposure Management
- Maturity improvement
CVE-2024-21762P1Retested
Supporting technology
RTable
Portal
Stop assuming. Start validating.
Know where you stand
Validate what's real.
Move from scanner-generated findings and false positives to real, exploitable exposure.
FindingsValidated Exposure
Know what matters
Prioritize real risk—not severity scores alone.
Use exploitability + business impact + real-world context to determine priority.
Validated ExposurePriority
Know what's next
Turn validated risk into action.
Prioritize remediation, assign ownership, track progress, and retest fixes.
PriorityAssignedRemediatedRetested
The shorter list
Findings
Validated exposure → Priority → Action
- P1CVE-2024-21762FinanceRetested
- P2Open RDPInfraRemediated
- P3Legacy VPNITAssigned
The Operator’s Perspective
Built by operators who do the work.
The people building our technology are the same operators testing environments, exploiting vulnerabilities, tracing attack paths, and helping teams fix what matters.
- Military Cyber Operations
- Offensive Security Research
- DEF CON / Black Hat
- Real-World Adversarial Testing
The Operator’s Perspective
Matt Toussain
Founder & Chief Information Officer
Offensive security operator, SANS instructor, and the founder behind Sirius — turning real attack experience into the methodology and tools other operators use.
- Offensive security
- Vulnerability operations
- Cybersecurity training
The Operator’s Perspective
Michael Pleasant
Chief Executive Officer
Marine Corps veteran and co-founder who built Open Security to make operator-grade cybersecurity accessible to the businesses that actually need it.
- Security leadership
- Veteran enterprise
- Client partnerships
The Operator’s Perspective
Josh Christman
Chief Operating Officer
COO who runs security engineering and the applied AI behind Aludra. Tests stay scoped to business risk. Findings stay ones an engineer will stand behind.
- Applied AI
- Aludra
- Security engineering
The Operator’s Perspective
Bryce Zuccaro
Principal Security Engineer
Principal Security Engineer who plans engagements, mentors operators, and teaches the craft — SANS SEC460, Red Team Village, and the Las Vegas AI Security Forum.
- Penetration testing
- Adversary simulation
- Cybersecurity training
The Operator’s Perspective
Jacob Krut
Security Engineer
A self-taught security engineer who started in bug bounty by turning a blind SSRF in Yahoo Mail into remote code execution. The same instinct later found a high-severity SSRF in ChatGPT.
- Bug bounty
- Application security
- AI security
Are you secure?And to what degree?
There's a difference between believing you're secure and being able to prove it.