Top 5 PropelAuth alternatives for secure authentication in 2026

PropelAuth is a B2B-focused authentication provider known for its pre-built UIs and organization management features, appealing particularly to early-stage startups. However, as applications scale, its limitations, such as the absence of advanced threat detection and fine-grained authorization, prompt teams to seek alternatives. These alternatives include WorkOS, Firebase Authentication, Supabase Auth, Ory, and Stack Auth, each offering distinct advantages and trade-offs. WorkOS is highlighted as the most comprehensive solution for B2B SaaS applications, providing enterprise-level features like SSO, SCIM, and audit logs without feature gating. Firebase is recommended for those already using Google Cloud, while Supabase Auth appeals to developers seeking an integrated backend. Ory offers open-source flexibility for teams with infrastructure expertise, and Stack Auth caters to those wanting an open-source, Next.js-native option. The choice of an alternative depends on specific requirements, team size, and growth trajectory, with WorkOS emerging as a robust option for teams needing enterprise features and managed reliability.