Best Ransomware Readiness Assessment Tools for Businesses
TL;DR · the short version
No single tool tells a business whether it is ready for ransomware, because three different things need testing: your controls, your endpoint reaction and your recovery. CISA's Ransomware Readiness Assessment (a module in the free CSET tool, released 2021) scores practices in tiers. KnowBe4's RanSim simulates ransomware-like behaviour on a Windows workstation to check whether protection reacts. PlayCISO's (ours) Ransomware Readiness Scorecard turns answers across seven areas into a 0-100 score and a gap list and needs a plan. Facts below were read on the owners' own pages on 4 November 2026.
No single tool tells a business whether it is ready for ransomware, because three different things need testing: your controls, how your endpoints react, and whether you can recover. CISA's Ransomware Readiness Assessment scores practices in tiers. KnowBe4's RanSim simulates ransomware-like behaviour on a Windows workstation. PlayCISO's (ours) Ransomware Readiness Scorecard converts your answers into a score and a gap list. Pick one for each layer.
Disclosure: PlayCISO publishes this page and is listed below, labelled "ours". Every outside fact was read on the owner's own public page on 4 November 2026. We name only the tools we could verify; others exist.
The shortlist at a glance (as of 4 November 2026)
| Tool | What it tests | What its page says (read 4 Nov 2026) | Cost as stated |
|---|---|---|---|
| CISA Ransomware Readiness Assessment (in CSET) | Your practices, by tier | "a self-assessment based on a tiered set of practices"; useful to "all organizations regardless of their current cybersecurity maturity" | CSET README: "a free software tool"; Windows (Docker recommended on Mac and Linux) |
| KnowBe4 RanSim | Whether a Windows workstation's protection reacts | "100% harmless simulation of real ransomware and cryptomining infections"; runs on Windows 10+ and "does not alter any existing files on disk" | Page states no price (it sits in the site's Free Tools menu) |
| PlayCISO (ours) Ransomware Readiness Scorecard | Controls across seven areas, with a gap list | Backups, identity, segmentation, exposure, detection, governance, recovery; 0-100 score | Needs a plan (see the pricing page) |
What each one tells you, and what it does not
CISA Ransomware Readiness Assessment (CSET)
CISA's 30 June 2021 alert (read 4 November 2026) describes the RRA as a new module in CSET, "a self-assessment based on a tiered set of practices", tailored to "varying levels of ransomware threat readiness". The cisagov/cset README (read 4 November 2026) calls CSET "a free software tool" and says CSET Enterprise only runs on Windows. The alert does not describe the tiers, and we did not confirm whether the module has changed since 2021, so check the current version. Best for: a documented, government-published baseline you can show an auditor.
KnowBe4 RanSim
The RanSim page (read 4 November 2026) says the software gives "a quick look at the effectiveness of your existing network protection" and does not use your own files. It tests the endpoint reaction layer only. Best for: checking whether your endpoint protection responds, after you have fixed the basics.
PlayCISO (ours): Ransomware Readiness Scorecard
The scorecard walks seven weighted areas (backups, identity, segmentation, exposure, detection, governance, recovery) and returns a 0-100 score with a gap list. The Backup 3-2-1-1-0 Checker goes deeper on the recovery layer. Both need a plan. It does not simulate malware or touch your systems; it scores what you tell it, so its answer is only as honest as your inputs.
Beyond tools: test the people and the decision
A score does not show whether your team can decide under pressure. Run a ransomware tabletop or a branching Cyber War Room scenario, and read our ransomware readiness assessment checklist for the questions to ask in each area.
How we compared
- We grouped tools by what they test (practices, endpoint reaction, controls and gaps), since they are not substitutes.
- One fact per outside tool, from its owner's page, read on 4 November 2026; we ran none of them.
- No prices unless the page states them; where it does not, we say so.
- PlayCISO is ours and is labelled.
Frequently asked questions
What are the best ransomware readiness assessment tools for businesses?
There are three kinds, and a business usually needs more than one. A practice-based self-assessment such as CISA's Ransomware Readiness Assessment (a module in the CSET tool) scores your controls. A simulator such as KnowBe4's RanSim tests whether a Windows workstation's protection reacts to ransomware-like behaviour. A scorecard or checker such as PlayCISO's (ours) turns your answers into a gap list for backups, identity and recovery. Facts as read on 4 November 2026.
Is there a ransomware self-assessment tool?
Yes. CISA released the Ransomware Readiness Assessment (RRA) as a module in its Cyber Security Evaluation Tool (CSET) in 2021. CISA's alert calls it "a self-assessment based on a tiered set of practices" for organizations of differing maturity. The CSET README calls CSET "a free software tool" and says CSET Enterprise only runs on Windows, with Docker recommended on Mac and Linux. We did not confirm whether the RRA content has changed since 2021.
Does a ransomware simulator replace a readiness assessment?
No. KnowBe4's page describes RanSim as a "100% harmless simulation of real ransomware and cryptomining infections" that gives "a quick look at the effectiveness of your existing network protection" on Windows 10+ workstations. That tests one layer, endpoint reaction. It does not tell you whether your backups restore, who can approve a payment, or how fast you can isolate.
What should a ransomware readiness assessment cover?
At minimum: backups (offline or immutable copies and a tested restore), identity (MFA and privileged accounts), exposure (remote access and unpatched internet-facing systems), segmentation, detection and response, governance (who decides, who is called) and recovery order. Our checklist lists the questions: see the ransomware readiness assessment checklist.
How often should we reassess ransomware readiness?
After any major change (new remote access, a new backup system, an acquisition) and at least yearly, with the restore test run more often. Treat a score as a prompt to fix the top gaps, not as a pass mark.
Sources
- CISA: CSET tool sets sights on ransomware threat, 30 June 2021, read 4 November 2026
- cisagov/cset on GitHub, read 4 November 2026
- KnowBe4 Ransomware Simulator, read 4 November 2026