Do you see what your systems miss?
Your systems aren't raising an alarm. But does that mean nothing unwanted is running? Our short self-assessment shows you in a few questions how big the gap between your current visibility and actual network activity might be — factually, in a few minutes.
Free. No login. You see your result immediately.
From which perspective are you answering?
Choose an option to start the self-assessment — the following questions are tailored to your role.
Achim Kraus — Co-Founder and CTO of AEGYS DATALYTICS AG. Achim Kraus has delivered complex security projects for leading cybersecurity companies and develops detection approaches at AEGYS DATALYTICS that work in practice.
Methodically supported by the advisory board of AEGYS DATALYTICS AG — with expertise from international threat research (incl. former Symantec, Acronis), critical infrastructure (NATO Digital Capability), and industrial security (KIT / FZI).
What a network check answers — and what it doesn't
No alert doesn't mean no incident. When your SIEM stays quiet, that feels reassuring. But your system only reports what it's configured to catch — everything else runs silently past. "No alert" doesn't automatically mean "no problem."
An average enterprise SIEM covers only about 21% of known attack techniques. That's the finding of the annual CardinalOps analysis of real-world SIEM environments, measured against the MITRE ATT&CK framework with its 600+ documented techniques (CardinalOps, 5th Annual State of SIEM Detection Risk, 2025; 13,000+ rules analyzed). The rest stays structurally undetected — not because the SIEM is bad, but because rules only find what they already know.
On average, it takes 241 days to identify and contain a breach. The IBM Cost of a Data Breach Report 2025 puts the average breach lifecycle at 241 days — about 181 days to detect and another 60 to contain. That's roughly eight months in which activity can run before it's found and shut down — and in the US, the average breach now costs USD 10.22 million.
A SIEM can't audit itself. What it doesn't detect, it doesn't know it isn't detecting. That's exactly where an independent second view comes in: a source outside your own tool stack that shows what's structurally going unseen. More on the blind spots in detail in the article on SIEM detection gaps.
A reality check doesn't replace a SIEM. It blocks no attacks, gives no complete picture, and replaces no consulting. It answers a single question: what's actually happening on the network, right now? If you want to build continuous, passive visibility, the architecture behind it is described under AEGYS Monitor and SIEM alternative.
Unlike a classic compromise assessment with agents on endpoints and forensic depth, AEGYS Monitor works passively at the network level — no agents on endpoints, no weeks-long project, point-in-time and as an independent second view. For organizations that want the question "is there still activity on the network?" answered fast and without organizational overhead, it's the pragmatic option.
Common questions about the network check
Continuous network visibility and autonomous pentesting — analysis where you choose.