Cloudflare vs Duo Security

Cloudflare and Duo Security are both security options. Here's how they compare on official platforms, features, and positioning — sourced from each vendor's own site, not from ratings or reviews.

Side-by-side summary

ComparingCloudflareDuo Security

CategorySecuritySecurity

Alternatives tracked22

PlatformsWebWeb, iOS, Android

Best for Cloudflare

Serves organizations "of all sizes," with free, small-business, and enterprise plans, for blocking DDoS attacks and bad bots, closing vulnerabilities, and accelerating/securing web applications.

Best for Duo Security

Organizations of any size, including government agencies, that need phishing-resistant multi-factor authentication and zero-trust access controls.

Feature comparison

Every feature listed here comes directly from each vendor's own official site.

Cloudflare

Web Application Firewall (WAF)
DDoS mitigation
Bot management
Content Delivery Network (CDN)
Single-pass traffic inspection with unified dashboard/API
AI security for applications

Duo Security

Multi-factor authentication supporting over 1.3 billion monthly authentications
Single sign-on across applications
Device trust to restrict access to trusted devices
Passwordless authentication via Duo Passport
Adaptive access policies based on risk factors
Admin dashboard for policy and user management

Pros and cons

Cloudflare

Pros

Web Application Firewall (WAF)
DDoS mitigation
Bot management
Content Delivery Network (CDN)
Single-pass traffic inspection with unified dashboard/API
AI security for applications

Cons

We don't publish a "cons" list for either product. No vendor's official site documents its own product's weaknesses, so there's no sourced basis for one — and we'd rather say that plainly than invent one.

Duo Security

Pros

Multi-factor authentication supporting over 1.3 billion monthly authentications
Single sign-on across applications
Device trust to restrict access to trusted devices
Passwordless authentication via Duo Passport
Adaptive access policies based on risk factors
Admin dashboard for policy and user management

Cons

Key differences

Cloudflare lists Web Application Firewall (WAF), DDoS mitigation, Bot management, Content Delivery Network (CDN), Single-pass traffic inspection with unified dashboard/API, AI security for applications that Duo Security doesn't list.
Duo Security lists Multi-factor authentication supporting over 1.3 billion monthly authentications, Single sign-on across applications, Device trust to restrict access to trusted devices, Passwordless authentication via Duo Passport, Adaptive access policies based on risk factors, Admin dashboard for policy and user management that Cloudflare doesn't list.
Duo Security supports iOS, Android, which Cloudflare doesn't list.

Choose Cloudflare if…

Choose Cloudflare if this fits: Serves organizations "of all sizes," with free, small-business, and enterprise plans, for blocking DDoS attacks and bad bots, closing vulnerabilities, and accelerating/securing web applications.

Choose Duo Security if…

Choose Duo Security if this fits: Organizations of any size, including government agencies, that need phishing-resistant multi-factor authentication and zero-trust access controls.

Facts on this page are sourced from each vendor's official site (linked below), not from ratings or reviews. Products change — verify anything that matters to your decision directly on the vendor's own site before switching. See our Disclaimer and Sources Policy.