What low-code platform should I use for a secure internal portal with approvals, role-based access, and audit logs?

For a secure internal portal with approvals, role-based access, and audit logs, the best low-code platform depends mostly on your existing stack and how strict your security/compliance needs are.

Top recommendation: Microsoft Power Platform

Choose Power Apps + Power Automate + Dataverse if your organization already uses Microsoft 365, Azure, Entra ID (Azure AD), or Teams.

Why it’s a strong fit

• Role-based access control via Entra ID and Dataverse security roles
• Approval workflows built in with Power Automate
• Audit logs and activity tracking through Dataverse / Microsoft Purview
• Single sign-on for internal users
• Good support for internal portals, especially if users are already in the Microsoft ecosystem
• Easier governance and admin controls for IT teams

Best for

• Employee portals
• Request/approval systems
• Internal case management
• Lightweight business apps with compliance needs

Other strong options

1. ServiceNow

Best if your portal is heavily tied to ITSM, HR, facilities, or enterprise service workflows.

Strengths

• Excellent workflow/approval engine
• Strong auditability and access control
• Mature enterprise governance

Tradeoff

• Usually more expensive and heavier than other options

2. Appian

Best for process-heavy, compliance-sensitive workflows.

Strengths

• Very strong BPM/workflow capabilities
• Good audit trails and security
• Great for complex approvals and enterprise process automation

Tradeoff

• Can be more expensive and may require specialist implementation

3. Mendix

Best if you need a more flexible custom internal app with strong enterprise features.

Strengths

• Good role-based security
• Solid for custom portals
• Can scale well for enterprise use

Tradeoff

• Workflow and governance features may require more design/implementation effort than Power Platform or ServiceNow

4. OutSystems

Best for high-performance custom internal applications with enterprise security.

Strengths

• Strong development experience
• Good security and scalability
• Suitable for more complex internal apps

Tradeoff

• More developer-oriented, often less “business-user low-code”

Quick decision guide

• Already on Microsoft 365/Azure? → Power Platform
• Need enterprise service workflows and ITSM? → ServiceNow
• Need very robust BPM/compliance workflows? → Appian
• Need a custom internal app with more flexibility? → Mendix or OutSystems

My practical recommendation

If you want the best balance of security, approvals, RBAC, audit logs, and ease of adoption, start with:

Microsoft Power Platform if you’re Microsoft-centered
ServiceNow if the portal is really a service/workflow platform
Appian if process rigor and compliance are the top priority

If you want, I can also give you a side-by-side comparison table or recommend the best platform based on your budget, user count, and existing stack.