Platform passkeys<\/td> Uses device-bound or synchronized cryptographic credentials<\/td> Can support phishing-resistant passwordless or MFA workflows<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nThe most important distinction is phishing resistance.<\/p>\n\n\n\n
A conventional OTP can be entered into a fraudulent website and relayed to the legitimate authentication service. A properly implemented FIDO2\/WebAuthn authentication flow binds the cryptographic response to the legitimate website’s origin, making this type of credential relay substantially harder.<\/p>\n\n\n\n
The NIST Digital Identity Guidelines explain these authentication requirements and distinguish phishing-resistant cryptographic methods from manually entered OTPs.<\/p>\n\n\n\n
The CISA guidance on implementing phishing-resistant MFA also emphasizes prioritizing phishing-resistant authentication over weaker verification methods.<\/p>\n\n\n\n
<\/span>MFA is not the same as passwordless authentication<\/span><\/h3>\n\n\n\nThese technologies overlap, but they solve different authentication problems.<\/p>\n\n\n\n
MFA adds another verification factor to an authentication process. Passwordless authentication removes the need for a conventional password.<\/p>\n\n\n\n
A passkey can support passwordless authentication when it is activated through a local biometric or PIN verification process. Depending on the implementation, the same technology can also serve as an additional factor in a password-based authentication flow.<\/p>\n\n\n\n
This distinction matters when evaluating products. A vendor advertising passwordless authentication does not necessarily mean every supported login configuration provides the same MFA assurance.<\/p>\n\n\n\n
<\/span>MFA Platforms Worth Evaluating<\/span><\/h2>\n\n\n\nThe following products represent different approaches to identity verification. Some provide workforce-wide authentication services, others extend existing identity infrastructure, and open-source alternatives give administrators more control over deployment and customization.<\/p>\n\n\n\n
They should not be treated as interchangeable products. The right comparison depends on whether an organization needs an authentication service, a broader identity platform, or an independently managed MFA infrastructure.<\/p>\n\n\n\n
<\/span>1. <PRIVATE_PERSON>Microsoft Entra ID<\/span><\/h3>\n\n\n\n<PRIVATE_PERSON>Microsoft Entra ID is particularly relevant to organizations already using Microsoft 365, Azure, Windows, and other Microsoft enterprise services.<\/p>\n\n\n\n
Its MFA functionality operates within a broader identity and access management environment. Administrators can configure authentication methods and apply access requirements through identity policies rather than managing an isolated verification service for every application.<\/p>\n\n\n\n
Supported authentication options include Microsoft Authenticator, FIDO2 passkeys, Windows Hello for Business, certificate-based authentication, OATH tokens, SMS, and voice methods, subject to the relevant configuration and eligibility requirements.<\/p>\n\n\n\n
The major advantage is its relationship with Conditional Access. Organizations can determine when additional verification is required based on factors such as application sensitivity, user identity, device compliance, and sign-in context.<\/p>\n\n\n\n
This creates a more flexible approach than requiring identical verification for every login.<\/p>\n\n\n\n
For example, an organization might require stronger authentication for administrators accessing cloud infrastructure while applying different policies to employees using managed office devices.<\/p>\n\n\n\n
However, Conditional Access and other advanced identity capabilities can depend on licensing. Administrators must also understand the relationship between Microsoft Entra policies, authentication method policies, and application-specific authentication requirements.<\/p>\n\n\n\n
Microsoft Entra ID is therefore particularly attractive when Microsoft already provides the organization’s central identity infrastructure. Organizations with heterogeneous application environments should evaluate federation, legacy authentication, and third-party integration requirements before assuming that every application will follow the same MFA policy.<\/p>\n\n\n\n
<\/span>2. Okta Adaptive MFA<\/span><\/h3>\n\n\n\nOkta Adaptive MFA is designed for organizations that need authentication policies across multiple applications, identity providers, and workforce environments.<\/p>\n\n\n\n
Its primary strength is its relationship with Okta’s broader identity platform. Organizations can configure authentication requirements at organizational and application levels while integrating MFA into single sign-on workflows.<\/p>\n\n\n\n
Supported methods include Okta Verify, WebAuthn\/FIDO2, custom TOTP, and integrations with external authentication providers, among other options.<\/p>\n\n\n\n
FIDO2 support is particularly relevant because it enables organizations to introduce security keys and supported platform authenticators instead of depending exclusively on codes and push notifications.<\/p>\n\n\n\n
Okta also provides FastPass, which supports passwordless and phishing-resistant authentication workflows within its ecosystem.<\/p>\n\n\n\n
One important purchasing consideration is product packaging. Adaptive authentication, device context, advanced policy capabilities, and other identity functions may depend on the selected Okta products and licensing arrangements.<\/p>\n\n\n\n
Organizations should also assess application compatibility. An MFA policy protecting a modern SAML or OIDC application may require a different integration approach when applied to older VPN systems, custom applications, or legacy infrastructure.<\/p>\n\n\n\n
Okta is worth evaluating when workforce identity management and centralized application access are broader requirements than simply adding another verification step.<\/p>\n\n\n\n
<\/span>3. Cisco Duo<\/span><\/h3>\n\n\n\nCisco Duo approaches MFA through a combination of authentication verification and device trust.<\/p>\n\n\n\n
Its value becomes particularly apparent in organizations that need to protect applications, remote access systems, and infrastructure containing both modern and legacy resources.<\/p>\n\n\n\n
Duo supports multiple authentication approaches, including Duo Push, passcodes, security keys, biometrics, and passwordless authentication.<\/p>\n\n\n\n
Its device-trust capabilities allow administrators to consider endpoint conditions when determining whether access should be permitted.<\/p>\n\n\n\n
This is important because successful authentication does not necessarily mean that the device requesting access is secure.<\/p>\n\n\n\n
For example, an employee might correctly authenticate using a registered phone while attempting to access corporate resources from an unmanaged computer. Authentication and device security represent separate decisions, and Duo helps organizations address both.<\/p>\n\n\n\n
Duo also supports integrations with VPNs, Active Directory environments, cloud applications, and custom authentication workflows.<\/p>\n\n\n\n
Its main purchasing advantage is the ability to introduce MFA across a heterogeneous environment without requiring every protected application to be rebuilt around one identity architecture.<\/p>\n\n\n\n
The trade-off is that advanced device trust, adaptive policies, passwordless capabilities, and other functionality depend on the selected edition and integration.<\/p>\n\n\n\n
Duo publishes a free offering for up to ten users alongside paid editions. Organizations should verify current eligibility, feature availability, and commercial terms before selecting a plan.<\/p>\n\n\n\n
<\/span>4. PingID<\/span><\/h3>\n\n\n\nPingID is a workforce authentication solution within the broader Ping Identity ecosystem.<\/p>\n\n\n\n
It is particularly relevant to organizations that need to extend MFA across established enterprise identity environments rather than replace their entire authentication infrastructure.<\/p>\n\n\n\n
The platform supports authentication through mobile push notifications, OTP methods, FIDO2-compatible authenticators, security keys, and other verification approaches.<\/p>\n\n\n\n
Its integration with PingOne for Workforce and other enterprise identity technologies makes it relevant to organizations operating centralized identity and federation systems.<\/p>\n\n\n\n
PingID also supports integrations involving Microsoft Active Directory, Windows login, Mac login, SSH applications, and enterprise single sign-on environments.<\/p>\n\n\n\n
One important consideration is the relationship between PingID and the surrounding Ping Identity architecture. Some capabilities depend on the identity platform and configuration in which PingID operates.<\/p>\n\n\n\n
FIDO2 support also requires compatible browsers, operating systems, and authentication policies. A security key should not be assumed to work across every application simply because the authentication platform supports the standard.<\/p>\n\n\n\n
PingID is worth considering when an organization already uses Ping Identity or requires a workforce authentication layer integrated with existing enterprise identity services.<\/p>\n\n\n\n
<\/span>5. RSA ID Plus<\/span><\/h3>\n\n\n\nRSA ID Plus targets organizations with demanding authentication requirements across cloud, hybrid, and on-premises environments.<\/p>\n\n\n\n
Its broad authentication coverage is a significant differentiator. Supported methods include FIDO2, passkeys, mobile push, biometrics, OTP, QR codes, SMS, voice, and hardware tokens.<\/p>\n\n\n\n
The platform also supports integrations through established enterprise mechanisms such as SAML, OIDC, and RADIUS.<\/p>\n\n\n\n
This makes RSA particularly relevant to organizations that cannot migrate every application to a modern cloud-based authentication model.<\/p>\n\n\n\n
A financial institution, for example, may operate cloud applications alongside internal systems, remote access infrastructure, and older authentication-dependent applications. Supporting different access environments through one identity strategy can reduce administrative fragmentation.<\/p>\n\n\n\n
RSA also offers offline authentication capabilities, which can be important in environments where connectivity to centralized authentication services cannot always be guaranteed.<\/p>\n\n\n\n
However, organizations should examine the exact offline workflows, supported applications, token requirements, and recovery procedures rather than assuming that all authentication methods work identically without network connectivity.<\/p>\n\n\n\n
RSA ID Plus is a serious candidate for organizations with hybrid infrastructure, established security operations, and demanding authentication continuity requirements.<\/p>\n\n\n\n
<\/span>6. privacyIDEA<\/span><\/h3>\n\n\n\nprivacyIDEA offers an alternative to commercial cloud-managed authentication services by providing an open-source, self-hosted MFA platform.<\/p>\n\n\n\n
Its architecture is particularly interesting for organizations that want direct control over authentication infrastructure, token management, and integration with existing identity sources.<\/p>\n\n\n\n
The platform supports different authentication mechanisms, including OTP tokens, FIDO2-related authentication, and other supported token types.<\/p>\n\n\n\n
It can connect with identity sources such as LDAP and SQL databases and provides policy-based management of authentication devices and users.<\/p>\n\n\n\n
This flexibility makes it useful for organizations protecting VPN access, SSH connections, web applications, and other systems that need additional verification.<\/p>\n\n\n\n
Its modular approach also allows administrators to integrate authentication into existing infrastructure rather than depending on one commercial identity provider.<\/p>\n\n\n\n
However, self-hosting changes the operational responsibility.<\/p>\n\n\n\n
The organization must manage server availability, database security, updates, backups, monitoring, certificate management, and recovery processes.<\/p>\n\n\n\n
Open-source licensing does not mean zero operating cost. Infrastructure, specialist administration, integration development, and support requirements can become significant at larger deployments.<\/p>\n\n\n\n
privacyIDEA is especially relevant to technically capable organizations that value deployment control, vendor independence, and customization.<\/p>\n\n\n\n
<\/span>7. Keycloak<\/span><\/h3>\n\n\n\nKeycloak is an open-source identity and access management platform that includes MFA functionality as part of its authentication architecture.<\/p>\n\n\n\n
Unlike a specialist MFA service, Keycloak provides a broader identity layer for applications that require centralized authentication, federation, and access management.<\/p>\n\n\n\n
Its authentication flows can combine username\/password verification with OTP and WebAuthn authentication.<\/p>\n\n\n\n
Administrators can configure conditional authentication flows, register authenticators, and define how users move through different verification steps.<\/p>\n\n\n\n
This makes Keycloak particularly useful for software companies, developers, and organizations building applications that need an identity provider under their control.<\/p>\n\n\n\n
Its support for standards such as OpenID Connect and SAML also makes it relevant to applications that need federated authentication.<\/p>\n\n\n\n
The main attraction is architectural flexibility. Development teams can integrate authentication into their applications without making a commercial identity platform the only possible identity authority.<\/p>\n\n\n\n
However, Keycloak requires technical ownership.<\/p>\n\n\n\n
Administrators must configure authentication flows, secure the deployment, maintain databases, monitor availability, and manage upgrades. Poorly designed flows can also create unexpected login behavior or recovery problems.<\/p>\n\n\n\n
Keycloak is a strong candidate when an organization needs a programmable identity platform with MFA rather than a ready-made workforce authentication service.<\/p>\n\n\n\n
<\/span>8. authentik<\/span><\/h3>\n\n\n\nauthentik is another open-source identity platform that provides MFA through configurable authentication flows.<\/p>\n\n\n\n
Its appeal is its ability to connect applications and authentication requirements through a centrally managed identity service.<\/p>\n\n\n\n
The platform supports TOTP devices, WebAuthn credentials, and static recovery tokens. Administrators can also introduce additional verification methods through configurable authentication stages.<\/p>\n\n\n\n
This gives organizations control over how users authenticate before reaching protected applications.<\/p>\n\n\n\n
authentik is particularly relevant to organizations managing self-hosted services, internal applications, and infrastructure that benefits from centralized authentication.<\/p>\n\n\n\n
Its approach is more flexible than installing a separate MFA application for every protected service.<\/p>\n\n\n\n
However, it should not be confused with a dedicated commercial workforce MFA service offering identical device intelligence, support arrangements, and enterprise authentication integrations.<\/p>\n\n\n\n
The organization remains responsible for deployment security, availability, upgrades, integration testing, and recovery procedures.<\/p>\n\n\n\n
authentik is worth evaluating when an organization wants an open-source identity provider with configurable MFA and is comfortable managing the infrastructure.<\/p>\n\n\n\n
<\/span>Comparing the MFA Platforms<\/span><\/h2>\n\n\n\nThe following comparison highlights the architectural differences that matter more than a generic feature count.<\/p>\n\n\n\nPlatform<\/th> Primary use case<\/th> Deployment approach<\/th> Main differentiator<\/th><\/tr> Microsoft Entra ID<\/td> Microsoft-centric workforce identity<\/td> Cloud identity service<\/td> Conditional Access and Microsoft ecosystem integration<\/td><\/tr> Okta Adaptive MFA<\/td> Cross-application workforce identity<\/td> Cloud identity service<\/td> Adaptive authentication and centralized SSO<\/td><\/tr> Cisco Duo<\/td> Workforce and remote-access protection<\/td> Primarily cloud-managed<\/td> Device trust and heterogeneous integrations<\/td><\/tr> PingID<\/td> Enterprise workforce authentication<\/td> SaaS<\/td> Integration with Ping Identity environments<\/td><\/tr> RSA ID Plus<\/td> Complex hybrid authentication<\/td> Cloud and hybrid options<\/td> Broad authentication methods and continuity options<\/td><\/tr> privacyIDEA<\/td> Independently managed MFA<\/td> Self-hosted<\/td> Open-source token and authentication management<\/td><\/tr> Keycloak<\/td> Application identity and authentication<\/td> Self-hosted<\/td> Programmable authentication flows and federation<\/td><\/tr> authentik<\/td> Self-hosted application identity<\/td> Self-hosted<\/td> Configurable authentication stages and access integration<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nThe products are not equally suited to every environment. Microsoft Entra ID and Okta are broader identity platforms, Duo emphasizes workforce authentication and device trust, and PingID and RSA address enterprise authentication requirements. privacyIDEA, Keycloak, and authentik provide greater infrastructure control but transfer more operational responsibility to the organization.<\/p>\n\n\n\n
<\/span>The Security Difference Between Traditional MFA and Phishing-Resistant MFA<\/span><\/h2>\n\n\n\nThe most consequential purchasing decision is often not which vendor to select but which authentication methods to enforce.<\/p>\n\n\n\n
An organization can deploy an expensive MFA platform and still expose users to phishing if its policies rely primarily on manually entered verification codes.<\/p>\n\n\n\n
Consider three different login scenarios.<\/p>\n\n\n\n
Scenario 1: Password and SMS verification<\/p>\n\n\n\n
An employee enters a corporate password and receives a verification code by text message. A phishing website can capture the password and relay the verification code to the legitimate service.<\/p>\n\n\n\n
The second verification step adds protection against some password-only attacks, but it does not prevent every real-time phishing technique.<\/p>\n\n\n\n
Scenario 2: Password and push verification<\/p>\n\n\n\n
The employee enters a password and receives an authentication request on a registered mobile device.<\/p>\n\n\n\n
This provides another verification step, but repeated fraudulent requests can encourage users to approve an authentication attempt without carefully examining it.<\/p>\n\n\n\n
Number matching and additional contextual information help reduce this risk.<\/p>\n\n\n\n
Scenario 3: Password and FIDO2 security key<\/p>\n\n\n\n
The employee enters a password and completes a WebAuthn authentication challenge using a registered security key.<\/p>\n\n\n\n
The cryptographic response is bound to the legitimate website’s origin. A fraudulent website cannot simply capture and replay the authentication response in the same way it can relay a manually entered OTP.<\/p>\n\n\n\n
This is why phishing-resistant authentication deserves priority when evaluating MFA platforms.<\/p>\n\n\n\n
<\/span>Why FIDO2 and WebAuthn deserve particular attention<\/span><\/h3>\n\n\n\nFIDO2 combines WebAuthn and the Client to Authenticator Protocol (CTAP) to support public-key-based authentication.<\/p>\n\n\n\n
Instead of relying on a shared verification code, a registered authenticator uses a cryptographic key pair.<\/p>\n\n\n\n
The private key remains protected by the authenticator, while the service verifies the signed authentication response using the corresponding public key.<\/p>\n\n\n\n
This architecture reduces dependence on secrets that users must manually enter.<\/p>\n\n\n\n
Organizations evaluating FIDO2 should examine:<\/p>\n\n\n\n
\nSupport for platform authenticators and external security keys.<\/li>\n\n\n\n Compatibility with desktop and mobile operating systems.<\/li>\n\n\n\n Browser and application support.<\/li>\n\n\n\n User verification requirements, including PIN or biometric activation.<\/li>\n\n\n\n Credential registration and revocation.<\/li>\n\n\n\n Security-key replacement procedures.<\/li>\n\n\n\n Passkey synchronization policies.<\/li>\n\n\n\n Recovery when users lose access to registered devices.<\/li>\n<\/ul>\n\n\n\nA particularly important distinction is between synced and device-bound credentials. Synced passkeys improve convenience and recovery across devices, while organizations with stricter hardware-control requirements may prefer policies that restrict where credentials can be stored.<\/p>\n\n\n\n
The correct approach depends on the organization’s threat model and assurance requirements.<\/p>\n\n\n\n
<\/span>How to Evaluate MFA Software Beyond Authentication Methods<\/span><\/h2>\n\n\n\nAn MFA platform should be assessed as part of the organization’s complete access architecture.<\/p>\n\n\n\n
A product that supports sophisticated authentication methods may still be unsuitable if it cannot protect the applications, devices, and remote access systems that employees actually use.<\/p>\n\n\n\n
<\/span>Application integration and authentication protocols<\/span><\/h3>\n\n\n\nStart by identifying the applications that require protection.<\/p>\n\n\n\n
Modern SaaS applications commonly support SAML or OpenID Connect (OIDC), allowing MFA to be enforced through an identity provider.<\/p>\n\n\n\n
However, older applications may rely on RADIUS, LDAP integrations, VPN authentication, reverse proxies, or proprietary login mechanisms.<\/p>\n\n\n\n
These differences matter.<\/p>\n\n\n\n
An organization might successfully enforce MFA on its Microsoft 365 applications but discover that an older remote desktop gateway or internal application requires a separate integration.<\/p>\n\n\n\n
A practical integration assessment should cover:<\/p>\n\n\n\n