BIO-key PortalGuard is a commercial MFA & passwordless solution by BIO-key International. Cisco Duo Passwordless is a commercial MFA & passwordless solution by Duo Security. Features, integrations, deployment and the company behind each one, side by side.
What our shortlists say about the one we picked.
Best for: Hybrid estates moving from MFA to passwordless in stages
We did not find enough recent first-hand reviews of this product to summarize what customers say.
From Best MFA and Passwordless Solutions for Business, Fall 2026
Reviewed by Nika (Nikoloz) Kokhreidze.
Zero Trust IAM platform with MFA, SSO, passwordless auth, and SSPR.
Passwordless authentication solution using biometrics, security keys, and MFA
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Based on what each listing shows: deployment, company size, price and open source.
BIO-key PortalGuard fits if you want a cloud product.
Cisco Duo Passwordless fits if you need both cloud and on-premises options and you are a startup or a small business.
Common questions when comparing BIO-key PortalGuard vs Cisco Duo Passwordless for MFA & passwordless.
BIO-key PortalGuard: Zero Trust IAM platform with MFA, SSO, passwordless auth, and SSPR. Built by BIO-key International.
Cisco Duo Passwordless: Passwordless authentication solution using biometrics, security keys, and MFA. Built by Duo Security.
The table above shows where their features, integrations, deployment and company size fit differ.
BIO-key PortalGuard is made by BIO-key International. Cisco Duo Passwordless is made by Duo Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. BIO-key PortalGuard and Cisco Duo Passwordless are both MFA & Passwordless products, and both cover Authentication, MFA. Use the table above to see where features, deployment and company size fit differ.
Need the answer fast? Best MFA and Passwordless Solutions for Business picks Okta Adaptive MFA, Cisco Duo Passwordless, Beyond Identity Phishing-Resistant MFA and 4 more.See the shortlist
