Building SaaS for Enterprise: Security and Compliance

TL;DR: Enterprise sales require specific security and compliance features: SSO/SAML, SOC 2 reports, audit logs, data retention policies, and custom SLAs. This guide covers the enterprise readiness checklist, implementing SSO with Better Auth, audit logging with D1, and the SOC 2 certification process.

Introduction

Enterprise customers have different requirements than individual users or small teams. They need security certifications, compliance guarantees, integration with their identity systems, and contractual commitments on uptime and data handling.

The enterprise readiness process isn't something you bolt on later -- it requires architectural decisions from the start.

Enterprise Readiness Checklist

SSO Implementation with Better Auth

Enterprise customers require integration with their existing identity providers. The SSO middleware intercepts authentication requests, detects whether the organization has SSO enabled, and redirects to the appropriate identity provider for SAML-based authentication:

export const enterpriseAuthMiddleware = defineMiddleware({
  before: async ({ request }) => {
    const host = request.headers.get('host')
    const org = await getOrgByDomain(host)

    if (org?.ssoEnabled) {
      const session = await verifySAMLResponse(request)
      if (!session) {
        return redirectToIdP(org.ssoUrl)
      }
      return { user: session.user, org }
    }
  },
})

The middleware checks the organization's SSO configuration on every request. If SSO is enabled, it verifies the existing SAML session or redirects to the IdP login page. This pattern keeps your authentication layer enterprise-ready without complicating the consumer signup flow.

Audit Logging System

Enterprise auditors and security teams need a complete record of every action performed in the system. The audit log captures who did what, when, and from where — storing each event as an immutable record in your database:

export const logAuditEventFn = createServerFn({ method: 'POST' })
  .handler(async ({ context }) => {
    const { userId, action, resource, details } = context.event

    await db.insertInto('audit_logs').values({
      user_id: userId,
      action, // 'user.deleted', 'subscription.changed'
      resource, // 'user:123', 'org:456'
      details: JSON.stringify(details),
      ip_address: context.request.headers.get('cf-connecting-ip'),
      user_agent: context.request.headers.get('user-agent'),
      timestamp: new Date().toISOString(),
    }).execute()
  })

Each audit event records the actor, the action performed, the affected resource, and environmental context like IP address and user agent. This data is essential for SOC 2 compliance, security investigations, and customer-facing audit trails.

Conclusion

Enterprise readiness is a journey, not a feature. Start with SSO and audit logs — these unlock mid-market deals. Pursue SOC 2 certification when enterprise revenue justifies the investment. Every enterprise feature you build should be billable at a higher tier. For a comprehensive view of protecting your infrastructure, see our SaaS Security Best Practices, and learn how multi-tenant architecture supports enterprise isolation in the SaaS Multi-Tenant Architecture guide.