Individual API integrations or an integration platform: which should you choose?
A standalone API integration between two systems is technically straightforward. An integration platform orchestrates ten systems at once. The choice between the two determines architecture, costs and maintenance burden for years to come. An honest comparison, with guidance on when to choose which route. Want to read more? See also website build costs.
Two different answers to the same question
If you want to connect two systems, such as your webshop with your accounting software, a direct API integration is the obvious choice. If you need to connect ten systems, orchestrate six data flows and require audit logging, complexity rises exponentially and an integration platform comes into view.
You have to choose between these two extremes. A wrong choice leads to a sprawl of point-to-point integrations (integration spaghetti) or to an over-engineered platform for a simple problem. You'll find more context on what an API integration is on our explainer page.
- Number of systems you're integrating
- Complexity of data flows
- Audit and governance requirements
- Expected growth in integrations
- In-house integration expertise
- Budget and maintenance capacity
What is the difference?
Standalone API integration
A direct integration between two systems via their APIs. Data is synchronised point-to-point, usually with a small middleware layer or directly between the systems.
- Webshop → accounting system
- CRM → marketing automation
- Form → CRM
- Specific bidirectional sync
- Quick to build
- Low investment
- Fully custom
Integration platform (iPaaS)
A central platform that connects multiple systems at once and orchestrates data. Offers ready-made connectors, monitoring, governance and scalability, for example through MuleSoft, Boomi, Workato or Azure Integration Services. Want to read more? See also app development costs.
- Orchestration across 5+ systems
- Organisation-wide data flows
- Hybrid cloud/on-premises setups
- Compliance-sensitive environments
- Central monitoring and governance
- Quick to scale up to more integrations
- Mature platform features
A direct comparison on practical criteria
Below are the core dimensions on which the two routes differ. In practice, hybrid approaches also exist, for example custom middleware that offers light orchestration without being an enterprise platform. Want to know more? See also custom software costs.
| Dimension | Standalone API integration | Integration platform (iPaaS) |
|---|---|---|
| Investment | Lower: no platform licence | Higher: setup plus annual licence |
| Time to first flow | Fast: days to weeks | Slower: platform setup beforehand |
| Time to tenth flow | Slow: every integration has to be rebuilt | Fast: reuse of connectors |
| Monitoring | Set up manually per integration | Central dashboard out of the box |
| Audit and governance | Manual, potentially inconsistent | Built in, uniform |
| Vendor lock-in | Low: you manage the code | Higher: platform-specific configuration |
| Flexibility of custom development | Completely open | Limited to platform capabilities |
| Long-term maintenance | Does not scale well with many integrations | Scales well within platform limits |
| Expertise required | Generalist developers | Platform-specific specialists |
Which choice suits which situation?
Three common scenarios with a concrete recommendation. For your own situation, the combination always matters: number of systems, data flow complexity and growth expectations.
SMEs with a few tools to connect
You have a webshop, an accounting system and a newsletter tool. You want orders booked automatically and customer data synchronised. Few additional integrations are expected.
Growing business with increasing integration needs
You currently connect four systems, but ten are likely to follow. Data needs to be monitored uniformly, and there are audit requirements from certifications, for example.
Enterprise with a hybrid landscape
You have SAP, Salesforce, on-premises legacy systems and several SaaS tools. Multiple teams are building integrations in parallel. Compliance, audit and governance are strictly required.
How to make a good choice
A structured decision process helps you avoid choosing on the basis of the wrong arguments. Four steps we use in discovery projects.
Take stock of current and future systems
Not just what is in place now, but what will be added within two years. Growing from four to twelve systems is a different challenge from staying stable with three.
Map out data flows
Simple one-way triggers are easy to handle with standalone integrations. Orchestrations involving waiting times, parallel steps and conditions require platform capability.
Determine governance and compliance requirements
Must every integration keep an audit log? Must changes follow the four-eyes principle? If so, platform features deliver this structurally, whereas standalone integrations require manual effort every time.
Calculate over 3 and 5 years
Platform licences look expensive, but at ten integrations they often pay for themselves in maintenance time and consistency. A piecemeal approach is cheap for three integrations, and expensive at fifteen.
The hidden third option: a hybrid architecture
In practice, most organisations don't choose purely one or the other. A pragmatic approach combines individual custom integrations for critical or complex flows with a lighter platform or API gateway for standard connectivity. Want to read more? Take a look at AI agents for business too.
This gives you speed and flexibility where needed, as well as central monitoring and consistency for the whole. For this route, experience in middleware development and API integration is essential.
- Custom middleware for core flows
- A lightweight iPaaS or gateway around it
- Central logging, decentralised development
- No full vendor lock-in
- Scalable without re-implementation
Frequently asked questions about API vs integration platform
When you structurally connect more than five systems, multiple teams build integrations in parallel, and you need central governance and monitoring. In that scenario, managing individual integrations becomes inefficient and error-prone.
In the short term, usually yes. But at scale the balance tips: every individual integration has its own monitoring, documentation and maintenance. With ten or more integrations, a platform often wins on total cost.
MuleSoft, Boomi, Workato, Azure Integration Services and IBM App Connect are widely used enterprise platforms. For SMEs, Zapier, Make and n8n are popular. The choice depends on existing cloud choices, budget and the type of integrations.
A situation where dozens of point-to-point integrations have been built over the years without central direction. Maintenance becomes a source of risk: a single change in one system can break several integrations. Prevent this by setting an integration strategy early and making considered platform choices.
Yes, but it costs money. Existing standalone integrations must be re-implemented within the platform, or a parallel route is needed. Plan explicit budget and timing for this — a migration without a strategy becomes a second integration spaghetti.
An API gateway manages the publication and governance of APIs that you expose yourself. An iPaaS builds integrations between existing systems. In larger architectures they work together: a gateway for external APIs, an iPaaS for internal orchestration. For SMEs, usually only one of the two is relevant.
Yes, in many SME and mid-market situations. Lightweight custom middleware gives you structure, central logging and flexibility without the licensing costs of a full-scale iPaaS. See our page on custom middleware development.
Assess them on three axes: connectors for your own systems, the pricing model over three years, and the ecosystem of specialists who know the platform. The cheapest platform is not sensible if you cannot find people to run it.
Need help choosing the right integration approach?
Describe your current and future systems landscape. We will give you independent advice on whether standalone integrations, a platform or a hybrid route suits your situation.
Integration is almost always part of a bigger picture. applatenmaken.com has an overview of IT, data and business operations software.