Three different things
They get discussed together and they solve different problems.
RPA operates applications through their interface — and, in practice, also handles files, orchestration and scheduling. UiPath, Automation Anywhere, Power Automate Desktop.
API integration connects systems programmatically, through interfaces built for that purpose.
Workflow tools sit between — visual builders that connect services through their APIs without much coding. N8N, Zapier, Make.
The wrong choice is usually RPA where an integration would have worked.
The order to consider them
1. Does the system already do it?
Before any tool. Most business systems have scheduled jobs, automated actions, import and export functions. Odoo has all of these.
A setting beats every option below, because there is nothing to maintain.
2. Is there an API — or a direct URL?
If both systems have an API, use it. If you just need a file and it has a direct URL, request it.
More reliable and cheaper to maintain, and neither breaks when a screen changes.
3. Would a workflow tool handle it?
If the systems have APIs and the logic is not complex, a visual workflow tool is faster to build than custom code and easier for a colleague to read.
4. Only then, RPA.
When there is genuinely no programmatic way in.
FIGURE 1: THE ORDER
Does your system already do it?
- A setting beats every tool. Nothing to maintain.
Is there an API or a direct URL?
- More reliable, cheaper, does not break on layout changes.
Would a workflow tool do?
- Faster than custom code, and readable.
Then RPA
- Only where nothing else reaches.
The honest comparison
Reliability. API integration is most reliable. Screen-based RPA is least, because it depends on layouts.
Maintenance. APIs change occasionally. Screens change often.
Build speed. RPA can be fastest to a working result, because it needs nobody’s cooperation. That is its real advantage and how it gets misused.
Cost. RPA licences are typically most expensive per robot. Workflow tools are cheap at low volume. Custom integration is a build cost then very little.
Reach. RPA can automate anything a person can use. The others need an interface designed for programs.
FIGURE 2: THE TRADE-OFF
API or workflow tool
- Does not break on layout changes
- Cheap to maintain
- Needs an interface to exist
- Slower to first result
RPA
- Works on anything a person can use
- Breaks when screens change
- Needs nobody’s permission
- Ongoing maintenance forever
The combination that actually works
Real pipelines use more than one — and the split is where the reliability comes from.
A worked example — a published dataset into your ERP:
RPA retrieves the file. If there is a direct URL, by HTTP request; if not, by navigating. Then it validates and hands off. Nothing else.
A workflow tool receives the whole file, parses it, maps the fields, checks for existing records, and creates them.
Your ERP does the rest with its own automated actions.
Each part uses the right tool, and the fragile part is one small step.
When the source website redesigns — and it will — you fix retrieval. The rest is untouched.
The mistake that costs most
Building RPA where an API existed.
It happens because RPA does not require anybody’s permission. You can build it without asking the other system’s owner, without a project, without a conversation.
Then it breaks every time the vendor updates, and you have signed up for years of maintenance you did not need.
Check properly. Ask the vendor. Read the documentation. Check whether an export function would do. Check whether the file has a direct URL.
This one question saves more money than anything else in this article.
Deciding for a specific task
Five questions, in order.
Does my existing system already do this? → use the setting
Do both systems have APIs? → integration or workflow tool
Is the logic simple and volume moderate? → workflow tool
Is it high volume or business-critical? → custom integration
Is there genuinely no programmatic way in? → RPA, for that step only
FIGURE 3: A PIPELINE THAT LASTS
RPA
- Only the step with no alternative
Whole file handed off
- One upload, cleanly
Workflow tool
- Parse, check, transform
Target system API
- Reliable writing
What none of them fix
A broken process. All three make a bad process faster.
Unclear ownership. Every automation needs somebody who understands it.
Bad data. Moving wrong data faster does not help.
Silent failure. The real risk in all three. Errors must reach a person.
The short version
Check your existing systems first. Then look for an API or a direct URL. Then a workflow tool. RPA last.
RPA’s advantage is that it reaches anything a person can use. Its cost is that screen-based automation breaks when screens change, and that cost never goes away.
Use RPA for the smallest possible part of the chain — just the step with no alternative — and reliable methods for everything else.
That single decision does more for how well a pipeline ages than any tool choice.
Not sure which approach your integration needs?
Get in touch. We will check for an API or a direct URL before recommending anything — that question decides most of it.
