# Build vs Buy a Customer Portal: SaaS vs Custom

> Should you build or buy a B2B customer portal? Compare SaaS, hybrid and custom development, ERP integration trade-offs and transparent test limitations. Private-by-default decision tool with a free local PDF.

Canonical: https://mihenkteknoloji.com/research/customer-portal-build-buy-hybrid

Last updated: 2026-10-26

Build or buy a B2B customer portal? Compare SaaS, hybrid ERP integration and custom development using practical procurement questions. Then use the free six-question tool for an initial recommendation and a three-part PDF, without creating an account.

## Build, buy or combine?

Choose an existing SaaS platform when the required customer portal fits established workflows, available integrations and documented permissions.

A hybrid portal can keep standard features in an established platform while custom integration supports exceptional workflows, ERP synchronization or specific customer journeys.

Custom portal development may suit requirements that existing products cannot support, but carries ongoing maintenance, security and delivery responsibilities.

## Decision evidence and limitations

The accompanying pilot includes eight synthetic reference checks: three role-based access checks, three ERP retry-behavior checks and two toy audit-log tests. These do not validate any commercial SaaS, ERP installation, implementation cost or security certification.

## Common questions

### Should I build or buy a B2B customer portal?

Start by checking whether an existing product supports your actual workflows, permissions and ERP integrations. Standard account access and document sharing may favor configuring SaaS. Unusual approval rules or multi-system dependencies may justify hybrid or custom development. This tool provides a directional assessment, not a vendor selection.

### When does a hybrid customer portal make sense?

A hybrid approach can keep standard features in an established SaaS or business platform while a custom integration or interface supports your unique processes. Confirm which system owns each data field, which team maintains each integration and what happens when the ERP is unavailable.

### How do I compare SaaS and custom customer portal costs?

Compare the full cost of ownership rather than an initial quote alone: licensing, implementation, integration, hosting, maintenance, security reviews and ongoing changes. This pilot does not estimate prices or validate vendor quotations.

### What should I test before connecting a customer portal to an ERP?

Define authorization boundaries, ERP API permissions, data ownership, retry limits and the handling of rejected or duplicated requests. The accompanying open tests illustrate synthetic RBAC, retry and audit-log behavior; they are not tests of a real ERP or a certified security system.

### What costs do B2B SaaS portal subscriptions leave out?

Check licenses, API and integration tiers, ERP connector maintenance, staff training, customer-specific changes, support, security reviews and eventual data export. Compare the full cost of ownership over the same period, not a subscription against a one-time development quote.

### Can a B2B dealer portal connect to SAP, Logo or Mikro?

Compatibility depends on the specific ERP version, modules, available APIs, licensing and network permissions. Require documentation and a realistic sandbox test before assuming any SaaS connector or custom interface will work. Mihenk does not claim a certified connector to these systems.

### What does a multi-branch B2B order portal need?

Define separate buyer and approver roles, branch-specific pricing, purchase limits, order visibility, credit rules and the ERP system of record. Test cross-branch isolation and rejected or duplicated orders; a shared catalog alone is not enough.

## Deep-dive procurement research

[Hidden Costs of B2B Ecommerce SaaS vs Custom Development](https://mihenkteknoloji.com/research/b2b-portal-saas-hidden-costs)

[ERP-Integrated B2B Dealer Portal: SAP, Logo and Mikro](https://mihenkteknoloji.com/research/erp-integrated-b2b-dealer-portal)

## Evaluate your options

[Open the six-question customer portal decision tool](https://mihenkteknoloji.com/tools/customer-portal-decision)

[Custom B2B portal development services](https://mihenkteknoloji.com/capabilities/product-engineering)

## Related
- [Hidden Costs of B2B Ecommerce SaaS vs Custom Development](https://mihenkteknoloji.com/research/b2b-portal-saas-hidden-costs)
- [ERP-Integrated B2B Dealer Portal: SAP, Logo and Mikro](https://mihenkteknoloji.com/research/erp-integrated-b2b-dealer-portal)
- [B2B Customer Portal Build vs Buy: SaaS, Custom or Hybrid](https://mihenkteknoloji.com/tools/customer-portal-decision)