KnowBe4 vs Tenable Nessus: Complete Comparison (2026)
Updated: March 7, 20268 min read
VS
Quick Comparison
KnowBe4
Tenable Nessus
Starting Price
$18/user/yr
$2790/yr
Free Plan
No
No
Users
65K+ orgs
43K+ orgs
Founded
2010
2002
Rating
4.6/5
4.5/5
Best For
Companies training employees to recognize and avoi...
Security teams running regular vulnerability asses...
Feature-by-Feature Comparison
KnowBe4Tenable Nessus
91Ease of Use89
96Features94
90Value for Money88
87Customer Support85
89Integrations87
90Mobile App88
AI Verdict
KnowBe4 leads with a ToolScout Score of 92 vs 90 for Tenable Nessus. KnowBe4 is best suited for Companies training employees to recognize and avoid phishing attacks, while Tenable Nessus excels for Security teams running regular vulnerability assessments across all IT assets. Both are strong options in the Cybersecurity space.
CHOOSE KNOWBE4 IF:
Companies training employees to recognize and avoid phishing attacks.
CHOOSE TENABLE NESSUS IF:
Security teams running regular vulnerability assessments across all IT assets.
Frequently Asked Questions
Is KnowBe4 better than Tenable Nessus?
KnowBe4 scores 92/100 on ToolScout compared to Tenable Nessus's 90/100. However, the best choice depends on your specific needs. KnowBe4 is best for Companies training employees to recognize and avoid phishing attacks. Tenable Nessus is best for Security teams running regular vulnerability assessments across all IT assets.
Does KnowBe4 have a free plan?
No, KnowBe4 does not offer a free plan. Plans start from $18/user/yr.
Does Tenable Nessus have a free plan?
No, Tenable Nessus does not offer a free plan. Plans start from $2790/yr.
Can I migrate from KnowBe4 to Tenable Nessus?
Migration between KnowBe4 and Tenable Nessus depends on the specific features you use. Both tools are in the Cybersecurity category. Check each tool's import/export options for data portability before switching.