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What allowlisting software does
Application allowlisting software lets only approved programs, scripts, and libraries run on a device and blocks everything else by default. Older material calls this 'application whitelisting'; the newer term means the same thing. NIST SP 800-167 describes the approach, and the CIS Critical Security Controls list maintaining an allowlist of authorized software as a safeguard.
Allowlisting vs. application control vs. antivirus
- Application control is the broad category: any tool that decides what may run. Allowlisting is its strictest, default-deny form.
- Antivirus and EDR mostly work the other way: software runs unless it looks malicious. Many organizations run allowlisting and EDR side by side.
- Blocklisting (deny known-bad) is easier to run but cannot stop software it has never seen.
Who it fits best
- Environments where software changes slowly — front-desk PCs, kiosks, servers, regulated workstations
- MSPs that want a consistent, auditable baseline across many clients
- Teams with someone who can own the approval process day to day
Rule types to compare
- File hash — most precise, but breaks on every update
- Publisher / certificate — trusts signed software from a vendor; fewer updates to manage
- Path — trusts a folder; convenient, but weaker if users can write to it
- Trusted installer or updater — allows what an approved process installs
- Script and library control — whether PowerShell, macros, and DLLs are covered, not only .exe files
Rollout: where projects succeed or fail
- Start in audit (learning) mode and inventory what actually runs before enforcing
- Enforce in stages — a pilot group first, then wider
- Define an exception process: who requests, who approves, how fast
- Plan for updates to line-of-business software and drivers
- Rushed enforcement is the most common reason users report blocked work
Evaluation checklist
- Operating systems and versions supported, in writing
- Policy granularity: per device, group, user, and client tenant
- How exception requests reach admins and how quickly they can be approved
- Offline behavior when a device can't reach the management console
- Reporting useful for audits and cyber-insurance questionnaires
- Built-in options vs. third-party tools (for example, Microsoft App Control/AppLocker vs. commercial products) and what each costs to operate
- Pricing per endpoint, minimums, onboarding fees, and what's excluded
Questions to ask in a demo
- Show me the first 30 days of a typical rollout, step by step.
- How many exception requests should we expect per week, and who handles them?
- How do you handle automatic updates from browsers and common business apps?
- Can we limit what an approved program may do, not only whether it runs?
- What happens if we cancel — how do we export policies and remove the agent?
Next steps
Compare allowlisting tools side by side on our comparison page, or take the free assessment to see whether allowlisting fits your environment. KyberScore does not rank vendors or accept payment for order; product details we have not confirmed are marked 'Not publicly verified'.
Frequently asked questions
Is application allowlisting the same as application whitelisting?
Yes. 'Application whitelisting' is the older term; 'allowlisting' is the newer one. NIST SP 800-167 uses 'whitelisting,' and both describe the same default-deny approach: only approved software runs.
Does allowlisting replace antivirus or EDR?
No. Allowlisting is preventive — it stops unapproved software from running at all. Antivirus and EDR are detective — they watch running software for malicious behavior. Many organizations run both side by side.
How much ongoing work does allowlisting take?
Expect a learning period in audit mode, then steady exception handling as users request new software and vendors ship updates. Environments with stable software need little weekly effort; fast-changing ones need a named owner for approvals.
What happens when a legitimate update gets blocked?
The admin approves it through the exception process — usually by trusting the publisher's certificate or the approved updater, so future updates from that vendor are allowed automatically. Well-tuned rules make this rare.
Is built-in operating system control enough, or do I need a dedicated tool?
Built-in options like Microsoft App Control and AppLocker can work for simple, Windows-only environments. Dedicated tools typically add easier policy management, script and library control, cross-platform support, and reporting — compare both against your workload and budget.
How long does a typical rollout take?
Plan for weeks, not days: an audit-mode inventory period, a pilot group, then staged enforcement. Rushing straight to enforcement is the most common cause of blocked work and failed projects.