Duo Security vs Tenable Nessus: Complete Comparison (2026)
In comparing Duo Security and Tenable Nessus in 2026, Duo Security is the stronger choice for organizations wanting easy-to-deploy mfa for all employees due to very easy user experience for mfa. Tenable Nessus excels for security teams running regular vulnerability assessments across all it assets with industry standard vulnerability scanner. Duo Security offers MFA push notifications, Device trust, SSO starting at $3/user/mo with a free plan. Tenable Nessus provides Vulnerability scanning, Compliance checks, Asset discovery from $2790/yr. For teams prioritizing value, Duo Security delivers a hiltonsoftware Score of 75/100. Duo Security and Tenable Nessus compete in the cybersecurity segment of the SaaS market, where cloud-native solutions, API integrations, and workflow automation drive enterprise and SMB adoption. Other leading cybersecurity tools include Okta, 1Password, Cloudflare. Duo Security serves 50K+ orgs users globally (founded 2010) while Tenable Nessus reports 43K+ orgs active users (founded 2002).
Duo Security vs Tenable Nessus at a Glance
What are the main differences between Duo Security and Tenable Nessus?
Duo Security and Tenable Nessus differ across ease of use, features, value, support, integrations, scalability, and learning curve. Duo Security leads in 6 of 7 categories.
What are the pros and cons of Duo Security vs Tenable Nessus?
Which is better, Duo Security or Tenable Nessus?
After evaluating Duo Security and Tenable Nessus across features, pricing, integrations, and user satisfaction, Duo Security earns a higher hiltonsoftware Score of 75/100 versus Tenable Nessus at 71/100. Duo Security stands out for "very easy user experience for mfa" and "trusted enterprise brand". Tenable Nessus delivers competitive advantages in "industry standard vulnerability scanner", making Tenable Nessus a viable alternative.
On pricing, Duo Security offers a free plan for SMBs and startups. Tenable Nessus starts at $2790/yr with no free tier, but justifies the cost with vulnerability scanning and compliance checks and enterprise-grade scalability.
Bottom line: Choose Duo Security for organizations wanting easy-to-deploy mfa for all employees. Choose Tenable Nessus for security teams running regular vulnerability assessments across all it assets. Both Duo Security and Tenable Nessus are established cybersecurity platforms.
Organizations wanting easy-to-deploy MFA for all employees.
Security teams running regular vulnerability assessments across all IT assets.
Duo Security vs Tenable Nessus: Frequently Asked Questions
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Reviewed by Elena Kowalski, Security & Enterprise Editor. Last updated: 2026-04-24. Pricing verified: March 2026.
Read our scoring methodology to understand how the hiltonsoftware Score is calculated.