RPA vs API or low-code: which automation approach suits you?
You want your systems to work together and take the manual work out of your processes. But how do you go about it? Do you have an API integration built, deploy a software robot or opt for low-code process automation? The question of RPA vs API comes up in almost every automation project. All three routes lead to less manual work, but they work very differently. And what is the smartest choice in one situation can turn out to be expensive or fragile in another.
API integrations: systems that talk to each other directly
An API is an agreed way for software to exchange data with other software. You can think of it as a service counter at the back of a system. Another system goes to that counter, asks for data or gives an instruction, and gets an answer straight away. No user screen is involved.
An API integration connects two or more systems via those counters. When a new order comes in through your online shop, the integration automatically forwards the data to your ERP. When a customer changes their address in the CRM, it is updated immediately in your accounting system.
Modern forms of integration make it increasingly easy to connect systems, and AI applications too. You can read more about this on our page about Zoho MCP.
RPA: a software robot that works via the screen
Where an API integration works via the back end, RPA uses the front end. A software robot mimics the actions of an employee: logging in, clicking, reading fields, entering data. So it does not need an integration, only access to the screen. You can read more about the technology on our page about robotic process automation.
That means RPA fills exactly the gap that APIs leave open. If a system has no API, or building an integration is too expensive or too time-consuming, a robot can often still automate the task. Think of collecting orders from a supplier portal or entering data in a government portal.
Zoho RPA and Collabotics are two solutions that are a good fit for SMEs. You can also find more about the difference between RPA and API integrations in a knowledge article from UiPath.
Low-code process automation: build it yourself without a programmer
Low-code is a way of developing software in which you work largely visually. Instead of writing lines of code, you drag components into place, draw workflows and set rules via menus. This means people without a programming background can also build applications and processes. A developer is only needed for the more complex parts.
Where RPA and APIs mainly connect existing systems, low-code goes a step further. You can use it to build new applications, redesign processes and manage integrations from a single environment.
Three low-code platforms in practice
RPA vs API vs low-code: the comparison
Putting the three approaches side by side shows where they excel and where they fall short.
| Characteristic | API integration | RPA | Low-code |
|---|---|---|---|
| Works via | The back end of systems | The screen, just like an employee | A visual platform with workflows and apps |
| Requires | A system with an API | Only access to the screen | A low-code platform |
| Speed at high volumes | Very high | Average | High within the platform |
| Stability | High | Sensitive to screen changes | High within the platform |
| Time to results | Weeks to months for custom work | Often a few weeks | A few weeks, depending on the scope |
| Who builds it | Developer | RPA specialist, key users for simple robots | Key users supported by a specialist |
| Ideal for | Stable, frequent data exchange | Systems without an API and temporary solutions | New processes and structural improvement |
What does each approach cost?
An API integration with a standard connector is usually affordable. If a custom integration has to be developed, the costs rise sharply because of the development hours. On the other hand, maintenance is limited as long as the API remains stable.
With RPA, the costs are in licences, building the robot and management. A robot is often quicker and cheaper to deliver than a custom integration, but needs more maintenance when screens change. If you use Zoho One, Zoho RPA is included in your subscription at no extra cost.
Low-code requires an investment in the platform and its configuration, but delivers a structural solution that you can adapt yourself. In the long run, that can result in the lowest total cost. You can find a detailed explanation of how to calculate a business case in RPA costs and ROI.
Decision guide: which automation approach suits you?
Not sure which route to take? Go through these five questions for the process you want to automate.
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Does every system involved have a good API?
Yes: an API integration is usually the most stable choice. If there is a standard connector, for example in Zoho Flow, it is also the fastest.
No: go to question 2.
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Is it a system with no integration options, such as old software or an external portal?
Yes: RPA is probably the best solution.
No: go to question 3.
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Do you want to redesign the process itself rather than just remove the manual work?
Yes: look at low-code process automation, for example with Zoho Creator or Creatio.
No: go to question 4.
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Is it a temporary situation, for example during a migration?
Yes: RPA is a quick and affordable stopgap.
No: go to question 5.
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Does the input arrive as free text, such as emails or documents?
Yes: combine RPA or low-code with AI. You can read how that works in RPA vs AI agents.
An example from practice
Do you answer yes to several questions? Then a combination is probably the best choice. In practice, that is the rule rather than the exception.
A wholesaler receives orders via the portals of large customers and via its own online shop. The online shop has an API, so those orders go straight to the ERP via an integration. The portals have no integration, so a software robot collects the orders there. In a low-code application, employees then track all orders, approve exceptions and see the status per customer. Three technologies, one continuous process.
Combining RPA, APIs and low-code
The wholesaler example shows that the question is rarely which technology you choose. The question is which technology you use for which part of the process. A good rule of thumb:
- Use an API where a stable integration is available.
- Deploy RPA for the gaps: systems without an API, portals and temporary situations.
- Build with low-code where you want to set up processes structurally, provide an overview or need your own applications.
By combining the three, you get the best out of each. You benefit from the stability of APIs, the flexibility of RPA and the adaptability of low-code. We call this coherent approach, supplemented with AI and process management, hyperautomation. You can read more about it in Hyperautomation: RPA, AI and process management combined.
Which approach is the most future-proof?
In the long run, API integrations and low-code are usually the most stable, because they are embedded in your systems. More and more software vendors offer good APIs, and low-code platforms grow along with your organisation.
That does not make RPA any less valuable. As long as there are systems without an integration, and in most organisations that will remain the case for years to come, a software robot is the fastest way to automate them. A robot can also serve as a temporary bridge. You automate with RPA today and later replace the robot with an API integration as soon as you replace a system.
The most future-proof choice is therefore an architecture in which you can use and swap the technologies flexibly. You can read which tools fit best in Choosing RPA software.
Where an integration was possible we had one built, and for our old package we use a robot. That combination works best for us.
Choose the approach that suits your systems
RPA vs API, or low-code after all? The best choice starts with a clear picture of your processes and systems. Once you have that picture, you can use each technology where it delivers the most.
Mobile XL knows all three routes from practice. We work with Zoho RPA, Zoho Flow, Zoho Creator, Creatio and Collabotics, and together with you we choose the combination that suits your situation. Without being tied to a single technology, and always with an eye on management, costs and GDPR.
Frequently asked questions about RPA vs API and low-code
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An API integration lets systems exchange data directly via the back end. RPA works via the front end: a software robot operates the screen, just like an employee. That makes RPA ideal for systems without an API.
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Low-code is a way of building applications and processes visually, with little or no programming. Where RPA mimics actions in existing systems, low-code lets you redesign processes structurally, for example with Zoho Creator or Creatio.
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Choose RPA if a system has no API, if building an integration is too expensive or time-consuming, or if you need a temporary solution, for example during a migration.
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Not always. An API is more stable and faster, but only possible if both systems have one. A custom integration can also be expensive. In those cases RPA is often the quicker and more affordable choice.
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Yes, and that is often the best approach. Use APIs where they are available, RPA for systems without an integration and low-code to set up processes structurally and provide an overview.
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A standard integration is usually affordable. Because of the development hours, a custom integration often costs more than a software robot. RPA is quicker to deliver, but needs more maintenance when screens change.
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Then RPA is often the only practical way to automate it. A software robot works via the screen and does not need an integration. The same applies to external portals and older desktop software.
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For the most part, yes. With visual workflows and ready-made components, key users can build and adapt processes themselves. For the more complex parts and a sound design, support from a specialist is wise.
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In the long run, API integrations and low-code are usually the most stable. RPA remains valuable as long as there are systems without an integration, and can serve as a temporary bridge until a system is replaced.
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For each process, look at which systems are involved, whether they have an API, how often the process occurs and whether you want to improve it or just remove the manual work. The decision guide on this page will help you get started.
Want to know which approach delivers the most for your processes?
Book a no-obligation consultation with one of our specialists.