PlainAudit vs Petronella SPRS Calculator
Full 110-control SPRS calculator from Petronella Technology Group. Technically accurate with correct SPRS point weights and real-time score gauge. The reference standard for accuracy among free tools, but assumes the user already understands every NIST control.
Petronella SPRS Calculator
Free (PDF report email-gated)
PlainAudit
Free assessment
Feature comparison
| Feature | PlainAudit | Petronella SPRS Calculator |
|---|---|---|
| Assessment approach | 14 domain-level questions with plain-English explanations and expandable tooltips | 110 individual control checkboxes using raw NIST language |
| Response options | Fully/Partially/Not Implemented/N/A with evidence-focused descriptions | Binary Yes/No only — no partial credit, no N/A option |
| Guidance | Every domain includes example controls and what the assessor checks | No explanations — you need to already know what each control means |
| Time to complete | 5–7 minutes for 14 questions | 20–40 minutes for 110 checkboxes |
| Score gating | Full SPRS estimate visible immediately, no email required | Score visible immediately, PDF report requires email |
| Price | Free assessment | Free (PDF report email-gated) |
Why switch from Petronella SPRS Calculator?
All 110 controls presented as a checkbox wall with binary yes/no only. No plain-English guidance, no partial implementation option, no remediation context.
- You want to understand what each domain means before answering, not just check boxes you don’t recognize
- You need partial implementation credit — not everything is a clean yes or no
- You want a 5-minute pulse check before committing to a 40-minute control-by-control walkthrough
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