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TL;DR - Duo Security
- Duo Security is a multi-factor authentication platform for securing access to applications
- It provides 2FA, device trust, and single sign-on with easy deployment across any app
- Free up to 10 users, paid plans from $3/user/month
Pricing: Free plan available
Best for: Growing teams
Pros & Cons
Pros
- Enterprise MFA leader
- Good security
- Easy setup
- Many integrations
- Cisco backing
Cons
- Expensive
- Cisco pricing complexity
- Per-user costs
- UI dated
- Better free alternatives
Key Features
Two-factor authenticationDevice trustAdaptive accessSingle sign-onRemote accessEndpoint security
Pricing Plans
Free TrialFree
Free
Up to 10 users
- 2FA for 10 users
- Mobile app
- Basic integrations
Essentials
$3/per user/month
Small teams
- Unlimited users
- Single sign-on
- User self-service
- Basic policy
Advantage
$6/per user/month
Growing companies
- Adaptive MFA
- Device trust
- VPN integration
- Phishing detection
Premier
$9/per user/month
Advanced security
- All Advantage
- Zero trust
- Risk-based auth
- Dedicated support
About Duo Security
By Toolradar Team·
Duo Security protects access with multi-factor authentication that's actually usable. Push notifications to phones, hardware keys, biometrics—2FA that doesn't frustrate users.
The user experience is thoughtful. Device trust policies add security. Cisco backing provides enterprise credibility.
Organizations implementing MFA choose Duo because it balances security with user experience.
How we evaluate tools →Source: duo.com
Reviews
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Duo Security FAQ
Is Duo Security free?
Free for up to 10 users. Essentials from $3/user/month. Advantage from $6/user/month. Part of Cisco.
What is Duo Security?
Duo Security is multi-factor authentication. Protect logins with 2FA. Acquired by Cisco.
Duo vs Okta?
Duo focuses on MFA. Okta is full identity platform. Duo for simple MFA; Okta for enterprise IAM.
How does Duo work?
User logs in, Duo sends push notification. Approve on phone to complete login. Simple and secure.
Source: duo.com