When does an iPaaS like Workato or Celigo beat a custom integration?
An iPaaS wins for common systems, standard objects and many integrations; custom code wins for unusual rules, custom records, high volume and full control. A decision table and cost factors.
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In short: An iPaaS such as Workato or Celigo beats custom code when you connect common systems with standard objects, need many integrations quickly, and have a team that will maintain flows in that platform. Custom code wins when your process has unusual rules, custom records or high volume, when licence costs would outgrow the build cost, or when you need full control over logic, hosting and monitoring. Many companies use an iPaaS for standard flows and custom code for the hard ones.
Decision table
| Question | Points to iPaaS | Points to custom |
|---|---|---|
| Are the systems common (NetSuite, Salesforce, Shopify, HubSpot)? | Yes, with prebuilt connectors | Niche or in-house systems |
| Are the objects standard? | Customers, orders, invoices | Custom records and unusual relationships |
| How many integrations? | Many, built over time | One or two critical ones |
| Who maintains it? | A team trained on the platform | Developers who maintain code |
| How unusual are the rules? | Close to the connector's template | Complex pricing, approvals, multi-step validation |
| Volume and latency | Moderate | High volume or strict latency |
| Data residency and control | Vendor-hosted is acceptable | Must run in your own infrastructure |
Total cost factors
Compare both options over several years, not just the first build:
| Cost | iPaaS | Custom |
|---|---|---|
| Licence or subscription | Recurring, often by connections, tasks or volume | None for the code; hosting instead |
| Build | Faster for standard flows | Slower at first |
| Maintenance | Platform handles connector updates | Your team handles API changes |
| Skills | Platform specialists | Developers |
| Monitoring | Built-in dashboards | You build or buy monitoring |
| Exit cost | Rebuild if you leave the platform | You own the code |
Price both with real numbers from vendors and your own team; do not assume either is always cheaper.
Warehouse and EDI integrations are a common case where a mix works well; see our 3PL EDI integration playbook.
A practical pattern
- Use the iPaaS or a native connector for standard, low-risk flows.
- Build custom services for the flows with complex rules or high volume.
- Keep one inventory, one alerting channel and one owner across both.
- Document field ownership so two integrations never fight over the same field.
Our integration architecture page shows how we combine queues, idempotency and monitoring in custom builds.
FAQ
Is Celigo good for NetSuite?
Celigo has strong prebuilt NetSuite flows for common ecommerce and CRM scenarios. Check how it handles your custom fields and records before committing.
When is custom integration a mistake?
When the scenario is standard, volume is low and no one will maintain the code. A connector is usually better there.
Can we start on an iPaaS and move to custom later?
Yes. Document field maps and rules as you go so a later rebuild is quicker.
Do iPaaS tools handle errors?
They provide retries and dashboards, but you still need someone watching alerts and fixing data.
How Octacer helps
Octacer builds custom integrations and works alongside iPaaS tools, especially around NetSuite and CRMs. See NetSuite services and CRM and ERP integration.
Next step
List the integrations you need, the objects each moves and the volume. That list usually makes the choice obvious. Book a call to review it.
Sources
- Workato, Platform overview: https://www.workato.com/platform
- Celigo, NetSuite integrations: https://www.celigo.com/integrations/netsuite/
Written by
Octacer Team
Octacer
Written from real client builds at Octacer: the systems, the trade-offs, and what we would do again.
