AuthKit vs Better Auth for B2B SaaS

AuthKit and Better Auth have both evolved into platforms offering enterprise authentication features such as SAML SSO, SCIM provisioning, organizations, RBAC, MFA, passkeys, dashboards, audit logs, and SIEM integrations, making a simple library-versus-hosted-service comparison outdated. The discussion argues that their main distinction lies in enterprise operational depth rather than feature checklists: WorkOS emphasizes more than 60 maintained identity-provider, directory, and HRIS integrations, including direct connections to Workday, BambooHR, and Rippling for lifecycle events, while Better Auth provides provider-agnostic SSO and SCIM but has not published comparable provider-specific or HRIS coverage. WorkOS also cites a public 99.99% SLA for key services, whereas Better Auth’s newer hosted offering should be evaluated against its current contractual terms. Better Auth may suit teams prioritizing open-source control, repository-based authentication, or newer areas such as agent identity, while AuthKit is positioned for B2B software companies facing enterprise security reviews, complex identity-provider requirements, employee offboarding expectations, and contractual uptime demands. AuthKit is free up to one million monthly active users and charges per enterprise SSO or directory connection, but neither hosted option fits air-gapped environments that require authentication services to remain entirely within a customer’s network.

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