5 Best WorkOS Alternatives for B2B SaaS Teams That Need Enterprise SSO in 2026

G2's 2025 B2B SaaS Buyer Report highlights the increasing demand for Single Sign-On (SSO) solutions among enterprise procurement teams, with 78% requiring SSO before signing contracts. The document evaluates five alternatives to the WorkOS platform, which initially solves SSO issues but becomes costly with its per-connection pricing model as a company's customer base grows. The alternatives—SSOJet, Auth0, Frontegg, Keycloak, and FusionAuth—offer various pricing models and features tailored to different business needs, such as flat-rate models, full consumer identity and access management (CIAM), pre-built admin UIs, open-source solutions, and developer-focused platforms. SSOJet is noted for its flat-rate pricing, which is advantageous for companies scaling beyond five enterprise customers, while Auth0 offers comprehensive CIAM features but can become expensive at scale. Frontegg provides pre-built tenant management UIs, Keycloak is ideal for teams with strong DevOps capabilities, and FusionAuth offers flexibility between self-hosted and managed options. The guide suggests that choosing the right platform depends on specific business requirements, including pricing predictability, compliance needs, and operational capacity.