2026 Authentication Software with SAML SSO Support: Top 10 Options

In 2026, Kinde emerges as a leading authentication software platform with SAML SSO support, particularly beneficial for B2B SaaS teams due to its seamless integration of enterprise-grade features like multi-tenancy, RBAC, and feature flags without the complexity typical of large-scale enterprise solutions. It stands out with its developer-friendly setup, offering SDKs for over 21 languages and a setup wizard that simplifies SAML configuration, enabling quick deployment and robust authentication capabilities. Kinde's usage-based pricing model, with a generous free tier, makes it accessible for startups and growing businesses, while its comprehensive feature set, including audit logs and machine-to-machine authentication, supports scalable and secure operations. Other options, such as Auth0 and Microsoft Entra ID, cater to different organizational needs, with Auth0 offering expansive third-party integrations and a newly improved free tier, while Microsoft Entra ID provides deep integration with Microsoft 365 and Azure services. Platforms like Keycloak and FusionAuth offer open-source and self-hosted alternatives, emphasizing control and flexibility for teams with strong DevOps capabilities. Each solution is evaluated based on criteria such as SAML implementation, developer experience, B2B feature depth, pricing transparency, and real-world performance, ensuring they meet the diverse needs of B2B SaaS environments.