What features do OATH (Open Authentication) vs Keycloak offer?

**OATH (Open Authentication)** differentiates with Open, royalty-free OTP specifications (HOTP, TOTP, OCRA), HOTP (RFC 4226): counter-based HMAC one-time password standard, TOTP (RFC 6238): time-based one-time password standard. **Keycloak** differentiates with Single sign-on (SSO), Multi-factor authentication with passkeys and recovery codes, Identity federation with external providers.

Who makes OATH (Open Authentication) vs Keycloak?

**OATH (Open Authentication)** is developed by OATH (Open Authentication). **Keycloak** is developed by keycloak. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Is OATH (Open Authentication) a good alternative to Keycloak?

OATH (Open Authentication) and Keycloak serve similar Multi-Factor Authentication and Single Sign-On use cases: both are Multi-Factor Authentication and Single Sign-On tools, both cover MFA, Authentication, Open Source. Key differences: OATH (Open Authentication) is Free while Keycloak is Commercial. Review the feature comparison above to determine which fits your requirements.

OATH (Open Authentication) vs Keycloak (2026) | Compare Multi-Factor Authentication and Single Sign-On Tools

Q: What is the difference between OATH (Open Authentication) vs Keycloak?

**OATH (Open Authentication)**: Vendor-neutral org publishing open standards for OTP & strong auth. built by OATH (Open Authentication). headquartered in United States. Core capabilities include Open, royalty-free OTP specifications (HOTP, TOTP, OCRA), HOTP (RFC 4226): counter-based HMAC one-time password standard, TOTP (RFC 6238): time-based one-time password standard.. **Keycloak**: Open-source IAM solution for SSO, MFA, and identity federation. built by keycloak. headquartered in United States. Core capabilities include Single sign-on (SSO), Multi-factor authentication with passkeys and recovery codes, Identity federation with external providers.. Both serve the Multi-Factor Authentication and Single Sign-On market but differ in approach, feature depth, and target audience.

OATH (Open Authentication)

Vendor-neutral org publishing open standards for OTP & strong auth.

Multi-Factor Authentication and Single Sign-On

Free

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Keycloak

Open-source IAM solution for SSO, MFA, and identity federation

Multi-Factor Authentication and Single Sign-On

Commercial

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Side-by-Side Comparison

Feature

OATH (Open Authentication)

Keycloak

Pricing Model

Free

Commercial

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Core Features

Open, royalty-free OTP specifications (HOTP, TOTP, OCRA)
HOTP (RFC 4226): counter-based HMAC one-time password standard
TOTP (RFC 6238): time-based one-time password standard
OCRA (RFC 6287): challenge-response authentication and transaction signing standard
Certification profiles for interoperability validation
Reference architecture for authentication implementers
Best-practice guides for enterprise authentication deployments
Technical working groups for community-driven specification development

Single sign-on (SSO)
Multi-factor authentication with passkeys and recovery codes
Identity federation with external providers
OpenID Connect, OAuth 2.0, and SAML 2.0 protocol support
User management and self-service account management
JWT authorization grant and token exchange
DPoP (Demonstrating Proof-of-Possession) support
Organizations feature for multi-tenancy

Community

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OATH (Open Authentication) vs Keycloak: 2026 Comparison

OATH (Open Authentication)

Keycloak

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