Cybersecurity · head to head
Cisco Duo vs Microsoft Defender
Microsoft Defender
Cybersecurity
Always-on protection for you and your family's data and devices
- From
- $12/month
- Rated
- -
The short version
- Only Cisco Duo has a free tier, so it costs nothing to try first.
- Each has a real cost: Cisco Duo free tier limited to 10 users maximum; Microsoft Defender defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which Cisco Duo and Microsoft Defender actually diverge.
| Attribute | Cisco Duo | Microsoft Defender |
|---|---|---|
| Starting price | Free | $12/month |
| Free tier | Yes | No |
Identical on both: pricing model (subscription), platforms (Web), user rating (Not yet rated), category (Cybersecurity).
What people use each for
The jobs each tool is most often brought in to do.
Cisco Duo
- Eliminating phishing with passwordless authnot Microsoft Defender
- Implementing zero trust with device trustnot Microsoft Defender
- Protecting sessions from hijacking and theftnot Microsoft Defender
- Managing compliance for regulated industriesnot Microsoft Defender
Microsoft Defender
- Endpoint security and threat protectionnot Cisco Duo
- Identity and access securitynot Cisco Duo
- Email threat protectionnot Cisco Duo
- SaaS application security monitoringnot Cisco Duo
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Cisco Duo
- Free tier limited to 10 users maximum
- Licenses must be purchased in 10-user increments (under 100 users) or 25-user increments (100+ users)
- Pricing is per-user per-month with minimum purchase increments
Microsoft Defender
- Defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
- Some Defender products use pay-as-you-go pricing with variable costs
- Prices vary based on Microsoft agreements, requiring sales contact for custom quotes
Pricing, plan by plan
Cisco Duo
Free- FreeFree
- Multi-factor authentication (MFA)
- Seamless integrations
- Authenticator app
- Essentials$3/month
- All Free features
- Duo Directory
- Phishing-resistant MFA
- Advantage$6/month
- All Essentials features
- Identity intelligence
- Cisco Identity Intelligence (ISPM, ITDR)
- Premier$9/month
- All Advantage features
- Complete device trust
- VPN-less remote access
Microsoft Defender
$12/month- Microsoft Defender Suite$12/month
- Endpoint protection
- Identity threat detection
- Email security
- Microsoft 365 E5 with Defender$60/month
- Includes Defender Suite
- Microsoft Teams included
- Comprehensive security and compliance
- Microsoft Defender Vulnerability Management Add-on$2/month
- Vulnerability scanning and management
- One-month free trial available
- Annual commitment required
Which should you pick?
Choose Microsoft Defender if
Nothing in the data separates Microsoft Defender from Cisco Duo on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is Cisco Duo or Microsoft Defender better?
- Neither clearly leads. Cisco Duo starts at Free and Microsoft Defender at $12/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Cisco Duo or Microsoft Defender?
- Cisco Duo has a free tier; the other does not. Paid plans start at Free for Cisco Duo and $12/month for Microsoft Defender.
- Does Cisco Duo or Microsoft Defender run on more platforms?
- Both run on Web, so platform support will not decide this one for you.
- Can I use Cisco Duo for free?
- Yes. Cisco Duo has a free tier, so you can try it without paying. Microsoft Defender starts at $12/month.
- What is Cisco Duo best used for?
- Cisco Duo is most often used for eliminating phishing with passwordless auth, implementing zero trust with device trust, protecting sessions from hijacking and theft, managing compliance for regulated industries. Of those, eliminating phishing with passwordless auth and implementing zero trust with device trust are not what Microsoft Defender is typically brought in for.
Answered from the vendors’ own pages
Cisco Duo: How much does Cisco Duo cost?
Cisco Duo Free is $0/user/month (up to 10 users). Paid plans start at $3/user/month (Essentials), $6/user/month (Advantage), and $9/user/month (Premier). Billing is per-user per-month.
SourceMicrosoft Defender: How much does Microsoft Defender Suite cost?
Microsoft Defender Suite costs $12/user/month (paid yearly), but requires existing Microsoft 365 E3 or equivalent base licensing. It includes endpoint protection, identity threat detection, email security, and SaaS application monitoring.
SourceCisco Duo: Is Cisco Duo free to try?
Yes, Duo Free offers multi-factor authentication and seamless integrations at $0/user/month for up to 10 users.
SourceMicrosoft Defender: What add-ons are available for Microsoft Defender?
Microsoft Defender Vulnerability Management Add-on costs $2/user/month with annual commitment and includes a one-month free trial. Additional pay-as-you-go products include External Attack Surface Management, Cloud Security Posture Management, and Sentinel.
SourceCisco Duo: What is the minimum purchase for Cisco Duo?
Organizations must buy licenses in 10-user increments for under 100 users, or 25-user increments for 100 or more users. Plans are modifiable at any time.
SourceMicrosoft Defender: Is Defender included in Microsoft 365 E5?
Yes, Microsoft Defender Suite is included in Microsoft 365 E5 at $60/user/month (paid yearly with Teams). Prices may vary based on Microsoft agreements, requiring contact with Sales for customized quotes.
SourceCisco Duo: What does the Advantage plan add over Essentials?
Advantage ($6/user/month) adds identity intelligence, Cisco Identity Intelligence (ISPM, ITDR), Duo Passport, session theft protection, Active Directory Defense, and risk-based authentication.
SourceRelated pages
More on Microsoft Defender
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