Top 30 IAM Solutions for Integrating Legacy Systems with Modern Security Protocols

Curated list of the top 30 identity and access management platforms that bridge legacy applications with contemporary authentication standards such as SAML, OAuth 2.0, OpenID Connect, SCIM, and FIDO2.

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Cloud‑native IAM with extensive pre‑built connectors for legacy LDAP, Active Directory, and mainframe systems, plus native support for SAML, OIDC, and SCIM.

Enterprise‑grade directory service that synchronizes on‑prem AD, supports hybrid federation, and offers modern protocols (SAML, OAuth, OIDC, FIDO2).

Identity suite focused on seamless integration of legacy SSO (SAML, WS‑Fed) with modern APIs (OAuth, OIDC) and adaptive MFA.

Unified portal that bridges on‑prem LDAP/AD and legacy web apps with cloud SSO, SCIM provisioning, and password‑less authentication.

IAM platform offering deep integration with mainframe and IBM i environments, plus modern protocol support and AI‑driven risk analytics.

Identity governance solution that connects legacy provisioning engines via connectors and supports SCIM, SAML, and OAuth for cloud apps.

Comprehensive IAM suite with legacy directory adapters, flexible policy engine, and native support for OIDC, FIDO2, and SCIM.

Hybrid IAM that extends RSA SecurID authentication to legacy VPNs and applications while adding modern SAML/OIDC SSO.

Privileged and workforce IAM that integrates with legacy LDAP/AD and provides password‑less, MFA, and SCIM provisioning.

PAM solution that bridges legacy privileged accounts with modern Zero Trust policies, supporting SSH, RDP, and API access.

Cloud IAM that synchronizes with on‑prem Oracle Directory and legacy ERP, offering SAML, OIDC, and SCIM for SaaS integration.

Lightweight directory service that syncs with on‑prem AD/LDAP and provides SAML SSO, OIDC, and password‑less login for G Suite and third‑party apps.

Developer‑focused IAM that can wrap legacy authentication flows with modern OIDC/OAuth endpoints and custom rules.

Cloud directory that replaces on‑prem AD, offering LDAP, RADIUS, SAML, and SCIM connectors for legacy and modern workloads.

Identity governance platform with deep connectors for legacy ERP, mainframe, and custom apps, plus modern API‑first provisioning.

MFA and access management solution that integrates with legacy VPNs, RADIUS, and SAML apps while supporting password‑less and biometric factors.

PAM suite that discovers legacy privileged accounts, enforces least‑privilege, and adds modern session monitoring and MFA.

#19 Keycloak

Open‑source IAM that can federate with LDAP/Active Directory and expose SAML, OIDC, and SCIM endpoints for legacy integration.

Open‑source identity platform offering LDAP integration, SAML, OIDC, and FIDO2, suitable for bridging on‑prem and cloud services.

Enterprise IAM with extensive legacy protocol adapters (WS‑Fed, SAML) and modern OAuth/OIDC, SCIM, and adaptive authentication.

Identity provider that adds adaptive MFA and password‑less login to legacy SAML and LDAP applications.

Combines SSO, MFA, and lifecycle management for legacy on‑prem apps with modern cloud services.

Identity lifecycle solution that synchronizes with legacy directories, mainframes, and provides SCIM provisioning for cloud apps.

Zero Trust IAM that unifies legacy AD/LDAP authentication with modern SAML/OIDC SSO and adaptive MFA.

Enterprise IAM platform that automates provisioning across legacy ERP, SAP, and modern SaaS via connectors and SCIM.

Customer identity solution that extends Ping federation to legacy portals while delivering OAuth/OIDC APIs.

#28 AuthAnvil

IAM focused on legacy Windows environments, providing SAML bridge, MFA, and password‑less authentication for on‑prem apps.

Integrates with mainframe and legacy IAM systems, offering policy‑driven access and modern protocol support.

Zero Trust SSH and Kubernetes access that connects legacy servers to modern identity stores via OIDC and SAML.

Customer‑facing IAM that can federate legacy corporate directories and expose modern OAuth/OIDC endpoints for external apps.

Policy engine that can wrap legacy authentication mechanisms (RADIUS, LDAP) with modern OAuth2 and UMA for fine‑grained access.

Enterprise federation server that bridges legacy SAML/WS‑Fed applications with modern OIDC and SCIM provisioning.

MFA platform that integrates with legacy VPNs, RADIUS, and LDAP while offering password‑less WebAuthn for modern apps.

Privileged credential manager that secures legacy service accounts and provides API‑first access for modern automation.