External exposure buyer guide
Compare External Attack Surface Management, vulnerability scanning and periodic external security reviews for asset discovery, prioritisation and remediation ownership.
Questions before procurement
Answer these before comparing suppliers or prices. They expose where ownership, evidence and expectations are still unclear.
Speak to usIf not, discovery should come before relying on a fixed scan list.
The faster the change, the shorter the useful life of a point-in-time review.
Volume without validation, context and accountable owners rarely reduces exposure.
Look for rescanning, evidence and a retained closure history rather than a status field alone.
Side-by-side view
The descriptions are category-level guidance, not claims about every provider. Confirm the precise scope, people, technology, evidence and exclusions before appointing anyone.
| Decision factor | Continuous EASM | Vulnerability scanning | Periodic external review |
|---|---|---|---|
| Asset discovery | Continuous and outside-in | Usually supplied targets | Defined during the review |
| Unknown assets | Core use case | Often missed | May be found within the agreed time |
| Known vulnerability coverage | Correlated with exposed technology | Core use case | Reviewed to agreed depth |
| Change detection | Continuous or scheduled | On scan cadence | Until the engagement ends |
| Threat and leak context | Can be connected to exposure | Normally limited | Included only if scoped |
| Human validation | Available for material signals | Separate triage may be required | Consultant-led |
| Remediation ownership | Tracked over time | Depends on internal tooling | Reported at a point in time |
| Best timing | Ongoing | Regular hygiene | Milestones and assurance events |
Use vulnerability scanning when you already know the assets and need efficient checks for known weaknesses. Use periodic external reviews for a point-in-time independent view. Use continuous External Attack Surface Management when the first problem is not knowing everything exposed to the internet, when that exposure changes frequently, or when findings need ongoing ownership and verification.
Where Pentesys fits
Pentesys combines external asset discovery, technology and vulnerability correlation, threat intelligence, credential and dark-web monitoring, consultant review and remediation tracking in one Pentesys Portal view.
FAQ
Not entirely. Scanning remains useful for technical weakness discovery. EASM broadens the question by discovering assets, monitoring change and adding ownership and external context.
No. EASM helps identify and prioritise exposed assets and changes. Penetration testing provides deeper investigation of an agreed system, including exploitability, business logic and chained attack paths.
A platform supplies capability. A managed service adds review, prioritisation, communication and ownership. The difference matters when internal teams do not have time to triage another raw feed.
Trusted experience
Pentesys has continuously performed admirably during our collaboration, giving us faith in their knowledge. They delivered work that above our expectations by approaching each project with a deep understanding of our specifications. Their team demonstrated a remarkable degree of proficiency by effectively pinpointing weaknesses and offering practical suggestions to reduce possible hazards.
Unlike previous pentests that produced generic outputs, this engagement gave us clear, prioritised actions with real-world attack scenarios. The platform visibility into assets, vulnerabilities and remediation progress has helped us mature our security posture significantly. The team were professional, responsive, and genuinely cared about improving our security rather than just ticking a box.
The red team and external attack surface management work highlighted blind spots we didn't know existed. What stood out was the strategic guidance alongside the technical delivery – helping us shape a longer-term security roadmap rather than a one-off engagement. This felt like a partnership, not just a transactional assessment.
Pentesys has continuously produced excellent work. Their group demonstrated extraordinary technical proficiency by spotting crucial flaws and offering clever fixes that greatly strengthened our security stance. Their meticulous approach and attention to detail ensured that every facet of the project was covered in full.
We engaged Pentesys and the team for a complex penetration test and adversary simulation. The quality of the technical findings, realism of the attack paths, and clarity of reporting were outstanding. The recommendations were practical and mapped clearly to business risk, which made board-level conversations much easier. We've since built Pentesys into our ongoing security assurance programme.
Assurance that joins up
Pentesys combines independent assurance, qualified testers and practical integration with the systems your teams already use.
The next useful step
Tell us what you need to prove, what has already been tested and what your stakeholders expect. We’ll recommend a proportionate route.
Request an exposure review