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YubiCloud

Freemium#14 of 25 in Multi-Factor Authentication APIs

YubiCloud: A free, focused API for adding YubiKey OTP validation to applications. Ranked #14 of 25 in Multi-Factor Authentication APIs by our editors (7.6/10); pricing: Free plan; best for free YubiKey OTP validation API.

7.6/10Editor score
Visit YubiCloud
YubiCloud7.6 Visit YubiCloud

At a glance

  • Editor score
    7.6 / 10
  • Pricing
    Free plan
  • Best for
    Free YubiKey OTP validation API
  • Free plan
    Yes
  • Founded
    2007 · Stockholm, Sweden
  • Facts checked
    20 Sep 2026

  • Where it wins

    • Free YubiCloud OTP validation API
    • Nonce replay protection with signed requests and responses
    • Globally distributed validation servers and broad SDK language support

  • Where it doesn't

    • Focused on YubiKey OTP validation rather than broader MFA methods
    • Integration requires application calls to the REST API
    • Paid support and SLAs are separate add-ons

Our verdict on YubiCloud

YubiCloud is Yubico’s hosted validation service for Yubico OTPs generated by YubiKeys. It is designed for teams adding two-factor authentication to online services and IT systems through application calls. Applications submit one-time passwords to a REST API over HTTPS GET requests, and YubiCloud returns validation results. The service is available through the web and API, with integration options for WordPress, phpBB and PAM. SDK language support includes PHP, C, .NET, Perl and Java.

The Free API plan provides the YubiCloud OTP validation API, making the product a focused option for teams that need YubiKey verification without a listed API subscription charge. Authentication uses a client ID, with an optional API key for signed requests. Paid support and service-level agreements are available as add-ons, giving organizations a separate path for support requirements beyond the core API. The plan structure is straightforward, but the product’s value depends on adopting YubiKey OTPs as the required authentication method.

Security-related controls are central to the service. Nonce-based replay protection helps prevent previously submitted OTPs from being reused, while signed request and response verification supports validation of API communications. Globally distributed validation servers are intended to support the hosted validation infrastructure across applications and IT systems. YubiCloud is a strong fit for organizations already standardizing on YubiKeys and wanting a narrow, hosted validation layer. Teams seeking multiple MFA methods, broader identity workflows or a more extensive authentication platform should consider an alternative with wider scope.

Your product? Our editors can test YubiCloud in depth and publish a review, labelled as paid · from $149/mo →

YubiCloud pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 20 Sep 2026.
See plans on yubico.com

All 1 YubiCloud plans and prices →

YubiCloud fact sheet

Free planYes
Paid fromNot verified
Passkey supportNot verified
Push verificationNot verified
TOTP supportNot verified
SMS OTPNot verified
Email OTPNot verified
SDK languagesPHP, C, .NET, Perl, Java
Webhook supportNot verified
DeploymentCloud
PlatformsWeb
SupportTickets, Docs · 24/7
Built forSmall business, Mid-market, Enterprise (editorial estimate)
Integrations3 integrations: WordPress, phpBB, PAM
PricingFree plan (source)
Websiteyubico.com
Facts checked20 Sep 2026

YubiCloud integrations

YubiCloud lists 3 integrations on its own site.

  • WordPress
  • phpBB
  • PAM

Alternatives to YubiCloud

See all YubiCloud alternatives →

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Featured on iTechGuides

Featured on iTechGuides — YubiCloud 7.6/10

YubiCloud is listed in our Multi-Factor Authentication APIs directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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