# BIO-key PortalGuard vs Cisco Duo Passwordless: side-by-side comparison (2026)

[BIO-key PortalGuard](https://cybersectools.com/tools/bio-key-portalguard) is a commercial [MFA & passwordless](https://cybersectools.com/categories/user-authentication) solution by [BIO-key International](https://cybersectools.com/companies/bio-key-international). [Cisco Duo Passwordless](https://cybersectools.com/tools/duo-passwordless) is a commercial [MFA & passwordless](https://cybersectools.com/categories/user-authentication) solution by [Duo Security](https://cybersectools.com/companies/duo-security). Features, integrations, deployment and the company behind each one, side by side.

## Our take

What our shortlists say about the one we picked.

### [Cisco Duo Passwordless](https://cybersectools.com/tools/duo-passwordless)

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](https://cybersectools.com/shortlists/best-mfa-passwordless-solutions), Fall 2026.

Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about).

Need the answer fast? [Best MFA and Passwordless Solutions for Business](https://cybersectools.com/shortlists/best-mfa-passwordless-solutions) picks Okta Adaptive MFA, Cisco Duo Passwordless, Beyond Identity Phishing-Resistant MFA and 4 more.

## Side-by-side comparison

| | BIO-key PortalGuard | Cisco Duo Passwordless |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | MFA & Passwordless | MFA & Passwordless |
| Verified | No | No |
| Deployment type | Cloud | Hybrid |
| Company size fit | Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | BIO-key International | Duo Security |
| Headquarters | – | – |

### Use cases and capabilities

| | BIO-key PortalGuard | Cisco Duo Passwordless |
|---|---|---|
| MFA | Yes | Yes |
| SSO | Yes | – |
| Authentication | Yes | Yes |
| Single Sign On | Yes | – |

### Core features

**BIO-key PortalGuard**

8 features listed. Sign in on the page to see them.

**Cisco Duo Passwordless**

10 features listed. Sign in on the page to see them.

### Integrations

**BIO-key PortalGuard**

2 integrations listed. Sign in on the page to see them.

**Cisco Duo Passwordless**

14 integrations listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [BIO-key PortalGuard](https://cybersectools.com/tools/bio-key-portalguard) fits if you want a cloud product.
- [Cisco Duo Passwordless](https://cybersectools.com/tools/duo-passwordless) fits if you need both cloud and on-premises options and you are a startup or a small business.

## BIO-key PortalGuard vs Cisco Duo Passwordless FAQ

Common questions when comparing BIO-key PortalGuard vs Cisco Duo Passwordless for MFA & passwordless.

### What is the difference between BIO-key PortalGuard and Cisco Duo 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.

### Who makes BIO-key PortalGuard and Cisco Duo Passwordless?

**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.

### Is BIO-key PortalGuard a good alternative to Cisco Duo Passwordless?

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.

## Related comparisons

- [BIO-key PortalGuard vs SAASPASS](https://cybersectools.com/compare/bio-key-portalguard-vs-saaspass)
- [BIO-key PortalGuard vs Deepnet DualShield](https://cybersectools.com/compare/bio-key-portalguard-vs-deepnet-dualshield)
- [BIO-key PortalGuard vs IDpendant Middleware](https://cybersectools.com/compare/bio-key-portalguard-vs-idpendant-middleware)
- [Cisco Duo Passwordless vs SAASPASS](https://cybersectools.com/compare/duo-passwordless-vs-saaspass)
- [Cisco Duo Passwordless vs Deepnet DualShield](https://cybersectools.com/compare/deepnet-dualshield-vs-duo-passwordless)
- [Cisco Duo Passwordless vs IDpendant Middleware](https://cybersectools.com/compare/duo-passwordless-vs-idpendant-middleware)

## Alternatives to each

- [See all BIO-key PortalGuard alternatives](https://cybersectools.com/alternatives/bio-key-portalguard)
- [See all Cisco Duo Passwordless alternatives](https://cybersectools.com/alternatives/duo-passwordless)

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Source: https://cybersectools.com/compare/bio-key-portalguard-vs-duo-passwordless

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/bio-key-portalguard.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on BIO-key PortalGuard and Cisco Duo Passwordless: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md