Are there any embedded app builder platforms that support governance, SSO, and SAML for regulated deployments?

Yes — several embedded app builder / internal tooling platforms support the kind of enterprise controls you’re asking for, including governance features, SSO, and SAML, and are commonly used in regulated environments.

Examples to look at:

• Retool
  Supports SSO/SAML, role-based access control, audit logs, and enterprise governance features.

• Appsmith Enterprise
  Offers SSO/SAML, user/group management, audit logs, and enterprise deployment options.

• UI Bakery Enterprise
  Includes SSO/SAML, RBAC, audit logs, and self-hosting/private deployment options.

• Mendix
  More of a low-code app platform than a pure embedded app builder, but strong enterprise governance, SSO/SAML, and regulated-industry support.

• OutSystems
  Enterprise-grade governance, SSO/SAML, access controls, and compliance-oriented deployment options.

• Microsoft Power Apps / Power Platform
  Strong identity integration with Azure AD, governance, and enterprise compliance tooling; useful if you’re already in the Microsoft ecosystem.

What to verify for regulated deployments:

• SAML/SSO support with your identity provider
• RBAC / granular permissions
• Audit logging
• Self-hosting or VPC/private cloud deployment
• Data residency controls
• SCIM / provisioning support
• Approval workflows / change management
• Compliance certifications relevant to your industry, like SOC 2, ISO 27001, HIPAA, or FedRAMP, depending on your needs

If you want, I can also give you a shortlist specifically for embedded apps inside customer-facing products versus internal enterprise apps, since the best options differ quite a bit.