Cisco Duo
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TL;DR
Cisco Duo is a two-factor authentication system acquired by Cisco in 2018. It provides multi-factor authentication, single sign-on, endpoint visibility, and adaptive access policies — all from a cloud console that IT teams can deploy in minutes.
Key Facts
Free version: Free tier covers up to 10 users with MFA, SSO for cloud apps, and basic endpoint checks.
Pricing
Starting at Free (up to 10 users); paid tiers from $3/user/month
Cisco Duo Free
- Multi-factor authentication for up to 10 users
- Mobile passkeys and push notifications
- SSO for cloud apps
- Basic endpoints visibility
Cisco Duo Beyond
- Everything in Free
- Policy-based authentication (device health, geolocation)
- Endpoint visibility and compliance checks
- Adaptive authentication policies
Cisco Duo Access
- Everything in Beyond
- Single sign-on for all apps
- Advanced reporting and audit logs
- Directory integration (LDAP, AD, Azure AD)
Additional Pricing Information
Duo pricing is per-user and scales cleanly: the free tier is generous for small teams, while paid plans unlock policy engine, SSO breadth, and endpoint compliance. Enterprise deployments with directory integrations and custom policies typically land on the Access tier. Cisco acquired Duo in 2018; since then Duo has been folded into the broader Cisco Secure portfolio but retains its own product identity and pricing.
Details
What is Cisco Duo?
Cisco Duo is the identity-side of Cisco Secure, focused on making sure the right people get in — and the wrong people don't. At its core is MFA: push notifications, mobile passkeys, hardware tokens, and SMS/phone fallbacks. Above that sits SSO, letting users reach all their cloud apps with one set of credentials, and endpoint visibility, which checks device posture before granting access. Policy engine ties it together — geolocation, device health, and user groups drive adaptive rules so a laptop on the office LAN gets treated differently from a phone on hotel Wi-Fi. The product scored 9.4 out of 10 across 446 TrustRadius reviews; reviewers consistently praise MFA reliability and ease of use while calling out push notification flakiness and pricing for smaller teams. Free tier covers up to 10 users — useful for small teams or a pilot. Paid tiers unlock policy-based authentication, SSO breadth, and directory integrations (AD, LDAP, Azure AD). For organizations already using Cisco Secure Client and Cisco VPN, Duo is the natural MFA layer; for everything else it competes squarely with Okta, Microsoft Entra ID, and WatchGuard AuthPoint.
Key Features
- *MFA with Push** — One-tap approval on the Duo Mobile app, the primary authentication flow
- *Mobile Passkeys** — Passwordless login on mobile devices, reducing phishing risk
- *Single Sign-On** — Cloud SSO for SaaS apps once directory is connected
- *Adaptive Policies** — Geolocation, device health, and user-group-based access rules
- *Endpoint Visibility** — Device posture checks before access is granted
- *Directory Integration** — AD, LDAP, and Azure AD sync for user lifecycle
- *Hardware Token Support** — YubiKey and other FIDO2/WebAuthn tokens
- *Reporting & Audit Logs** — Admin dashboards tracking auth events and policy hits
Who is it for?
- Organizations that need MFA and SSO without a heavy on-prem identity infrastructure
- Microsoft 365 and SaaS-heavy environments looking for a clean, fast-to-deploy auth layer
- IT teams that want admin-friendly policy controls (device health, geolocation) without a VPN
- Enterprises already in the Cisco Secure ecosystem — Duo integrates naturally with Cisco Secure Client and VPN
- Small to mid-sized businesses that outgrow the free tier but don't need a full identity governance platform
Who is it NOT for?
- Organizations that need full identity governance, lifecycle, and SoD — look at Okta or SailPoint instead
- Air-gapped or heavily offline environments — Duo's reliance on internet connectivity is a real constraint
- Teams that want a single tool to manage passwords, secrets, and MFA for developers — Bitwarden or 1Password may fit better
- Cisco-averse shops with no existing Cisco footprint — the integration benefit disappears
The Bottom Line
Cisco Duo is one of the most reviewed MFA+SSO products on the market for a reason — it works, it deploys fast, and end users mostly like it. The 9.4/10 TrustRadius score reflects genuine satisfaction, especially among IT teams that value the admin console and policy engine. The push notification reliability issue is real and worth testing before committing. Pricing is clean and predictable, which matters for growing teams. If your identity story is "we need MFA and SSO for cloud apps, fast," Duo is a strong pick; if you need full identity governance or a heavy on-prem footprint, look further up the stack.
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