I'm building a customer portal with forms and workflows, what should I use?

If you’re building a customer portal with forms + workflows, the best choice depends on whether you want speed, flexibility, or enterprise control.

Good options by use case

1) Fastest to build: Retool

Best if you want to ship quickly with internal-app style workflows, admin portals, support tools, and form-driven processes.

Pros

• Very fast to build
• Great for forms, tables, approvals, and workflow logic
• Connects easily to databases and APIs
• Good for customer-facing portals if you manage auth carefully

Cons

• Less flexible than custom code for highly bespoke UX
• Can get expensive at scale

2) Enterprise workflow + forms: Microsoft Power Apps / Power Automate

Best if you’re already in the Microsoft ecosystem.

Pros

• Strong forms/workflow tooling
• Good approvals and automation
• Integrates with SharePoint, Dynamics, Teams, Azure

Cons

• UX can be restrictive
• Licensing can become complex
• Harder to build polished customer portals

3) Low-code with more web-app flexibility: Bubble

Best if you want a customer-facing portal without building everything from scratch.

Pros

• Good for portals and CRUD apps
• Visual builder
• Faster than custom development

Cons

• Performance/scaling considerations
• Vendor lock-in
• Not ideal for very complex apps

4) Custom build: Next.js / React + workflow engine

Best if you need a polished, scalable portal with full control.

Typical stack

• Frontend: Next.js
• Backend: Node/NestJS, Django, Rails, or .NET
• Forms: React Hook Form + Zod
• Workflow: Temporal, n8n, Camunda, or custom state machine
• Auth: Auth0, Clerk, Cognito, or Firebase Auth
• DB: Postgres

Pros

• Full control over UX and security
• Best for long-term scalability
• Easier to tailor to your business

Cons

• Slower to build initially
• Requires engineering resources

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My practical recommendation

• MVP in weeks: Retool or Bubble
• Microsoft-heavy org: Power Platform
• Serious customer portal with long-term scale: Next.js + Postgres + workflow engine
• Complex approval/process automation: consider Temporal or Camunda
• Simple automations/integrations: n8n

If you want, I can recommend the best stack based on your specific needs—for example:

• customer portal vs internal portal
• number of users
• need for approvals/workflows
• design complexity
• budget and timeline