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Most organisations now depend on more cloud providers, outsourced services and interconnected partners than a single questionnaire cycle was ever designed to track.
Risk and security teams already have plenty of third-party risk management (TPRM) tools to choose from: vendor assessments, monitoring platforms, shared-assurance networks. Each one covers a different part of supplier risk, but none of them covers all of it, so relying on just one leaves a blind spot nobody's watching.
Here are four common approaches to TPRM, what each one gets right, and where it runs out of road.
For many organisations, vendor risk management begins with a questionnaire: suppliers complete assessments, provide evidence and answer security, compliance and operational questions, and risk teams review the responses to make a decision.
This approach has real benefits. It creates a structured, auditable due-diligence trail and gives a clear read on a supplier's controls at a specific point in time.
But that point in time doesn't last. A supplier can change its technology stack, ownership structure, data access model or service scope within weeks of completing an assessment — yet most organisations don't revisit their highest-risk vendors until the next annual cycle. In the meantime, security teams spend hours chasing evidence, managing follow-ups and processing questionnaires that answer yesterday's questions.
A vendor assessment is a snapshot: accurate for the day it was taken, silent on everything that happens next.
To close that gap, many organisations turn to outside-in monitoring: platforms that watch suppliers from the outside using signals like cyber ratings, internet-facing vulnerabilities and attack-surface changes, then alert teams when something shifts.
Continuous monitoring genuinely helps; it surfaces emerging concerns between assessment cycles and points teams toward the vendors that need attention now rather than at the next review.
The limitation is what these tools can't see. They have no visibility into a supplier's internal controls, remediation work or governance practices, and no sense of how important that supplier actually is to your business. A vulnerability alert might be a five-alarm fire for one vendor and background noise for another, depending on the service they provide, the data they touch and how much your business depends on them.
Monitoring is good at flagging that something changed. But it doesn't tell you what that change means for you.
A third approach, shared assurance, flips the questionnaire model: suppliers publish certifications, attestations and standard responses once, and customers reuse that evidence instead of each running their own bespoke assessment.
It solves a real problem. Supplier fatigue drops, the administrative load on risk teams goes down, and information gathering speeds up.
What it doesn't solve is fit. A standard assurance package is written for a generic audience, not your specific data flows, contractual obligations, operational dependencies or regulatory requirements. It says nothing about how a supplier's risk changes after the package was published.
Shared assurance can cut effort. It can't substitute for context or ongoing oversight.
Many organisations also lean on cybersecurity-focused risk platforms for ratings, threat intelligence and exposure insights. These tools are genuinely useful for spotting technical weaknesses and giving security teams a starting point to investigate — cyber risk is a real part of third-party risk, just not the only part of it.
A supplier can also be financially unstable, dangerously concentrated in a single service area, exposed to regulatory action, vulnerable to operational disruption or facing a reputational problem, and none of that shows up in a cyber score. Knowing a supplier has a vulnerability isn't the same as knowing what that vulnerability would cost your organisation if it were exploited.
There's an operational cost to this narrowness too. When cyber risk, financial health, legal exposure and ESG standing are each owned by a different one-dimensional tool, procurement, ESG, legal, finance and cyber teams end up running separate reviews of the same supplier, chasing separate evidence through separate channels. None of those tools talks to the others, so someone still has to manually pull five disconnected assessments into one picture before a decision can actually be made — the exact administrative burden a "TPRM tool" was supposed to remove in the first place.
Treat cybersecurity as the whole picture, and everything outside it becomes a blind spot you don't know you have — and a duplication problem you're paying for across five departments at once.
Put the four side by side, and the gaps aren't identical in kind. Outside-in monitoring and cyber-risk tools are working from the right instinct — up-to-date, if partial, visibility — so joining their signals into one place genuinely gets you closer to a complete real-time picture. That's a data problem worth solving by connecting sources.
Traditional vendor assessments and shared assurance are a different kind of gap. Both are built around a point-in-time, compliance-driven model: complete the questionnaire, gather the certification, check the box, move on until the next cycle. That model was designed to prove a review took place, not to reflect how a supplier's risk changes the week after.
Feeding more data into a review that's stale by design doesn't make it current. Assessments and shared assurance need a different role in the program: used selectively to validate specific concerns, rather than serving as the default, recurring engine that shapes everything else.
What actually closes these gaps is redesigning the operating model around continuous, contextual risk data — cyber, financial, ownership, sanctions, regulatory, supply-chain and reputational intelligence — with assessments and shared assurance folded in as targeted, occasional inputs rather than the foundation everything else gets bolted onto. That shift also spares procurement, legal, ESG, finance and cyber from each re-assessing the same supplier on their own, since every department is working from one continuously updated picture instead of four separately maintained ones.
The limitations of assessment-led approaches are no longer just an academic discussion. As supplier ecosystems grow more complex and risks evolve between review cycles, security leaders are increasingly questioning whether traditional approaches provide the visibility and responsiveness they need.
At a recent Gartner Security & Risk Management Summit roundtable, CISOs debated exactly this challenge. The conversation moved beyond tools and questionnaires to a more fundamental question: can today's assessment model account for how quickly vendor risk actually changes?
Read: Why CISOs are questioning the vendor assessment to see how security leaders are thinking about the future of third-party risk management.
Consider this: Instead of relying on periodic assessments alone, organisations can combine cyber, financial, ownership, sanctions, regulatory, supply-chain and reputational intelligence into a single view of risk.
Yes, assessments still play an important role, but they are used selectively to validate concerns, fill information gaps and support important decisions.
This gives TPRM a more proactive, scalable footing. Risk teams spend less time administering questionnaires and more time identifying issues, prioritising action and closing out remediation. They gain a clearer understanding of which suppliers matter most, what has changed and where intervention is needed.
Connecting assessments, monitoring, assurance, remediation and governance into one risk-based program means a decision about any supplier reflects what's true today, not what was true at the last review cycle.
Ready to see what this looks like in practice? See how Diligent's third-party risk management solution brings your assessments, monitoring, assurance and remediation into one connected view.
