The verdict in three sentences
To connect several tools, an iPaaS (Make, Zapier, n8n) lets you start fast for 20-500 USD/month, while a custom API costs 4,000-12,000 USD once and for all. The tipping point depends on operation volume: beyond a certain threshold, iPaaS limits and overage fees make custom more economical. The real question is not the sticker price but maintainability, latency and total cost over 3 years.
2026 cost comparison
Total cost depends on monthly operation volume and how long you run it. Here are the 2026 orders of magnitude for a Singapore leader.
| Approach | Upfront cost | Monthly cost | Operation limit |
|---|---|---|---|
| Zapier (Pro plan) | 0 | 50 - 200 USD | by tasks/month |
| Make (Core/Pro plan) | 0 | 20 - 150 USD | by operations |
| n8n self-hosted | 200 - 800 USD (setup) | 20 - 60 USD (server) | unlimited (self-host) |
| Enterprise iPaaS | 500 - 2,000 USD | 300 - 500 USD | high |
| Custom API | 4,000 - 12,000 USD | maintenance 15-20%/yr | none |
Over 3 years, an iPaaS at 300 USD/month totals 10,800 USD: close to the cost of a custom API, but without the control or performance of a dedicated build.
The cost / volume tipping point
Beyond price, three factors decide the right choice: maintainability, latency and operation volume. Here is how they interact.
| Factor | iPaaS | Custom API |
|---|---|---|
| Setup | Days | Weeks |
| Latency | Seconds to minutes | Milliseconds to seconds |
| Cost at high volume | Rising (per operation) | Fixed (once built) |
| Complex business logic | Limited | Full |
| Vendor lock-in | High | Low |
| Tipping point | < 10,000 ops/month | > 10,000 ops/month |
As a rule, under 10,000 operations per month and for simple flows, iPaaS wins. Beyond that, or as soon as fine business logic appears, the custom API regains the economic and technical edge.
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Mini case study
Wei runs a distribution company in Singapore that must connect its CRM, invoicing tool and stock system. He starts with Make at 90 USD/month: live in 5 days, ideal to validate the flows. But as he grows, he reaches 35,000 operations/month, pushing the bill to 340 USD/month, or 4,080 USD/year. He commissions a custom API at 7,500 USD plus 1,300 USD/year maintenance. From year two, custom costs him 1,300 USD/year versus 4,080 USD on iPaaS: a saving of 2,780 USD/year, plus latency cut tenfold and zero operation limits.
FAQ
When should I start with an iPaaS? When you want to validate a flow quickly, at low volume and with simple logic. iPaaS is perfect for prototyping and proving value before investing in custom.
Is n8n an interesting alternative? Yes. Self-hosted, n8n offers iPaaS flexibility without the per-operation cost, for about 20-60 USD/month of server. It is a good compromise if you have a team able to run it.
How do I estimate my operation volume? Count each automated action: an order triggering an invoice + a stock update = 2 to 3 operations. Multiply by your monthly volume to locate your tipping point.
Is custom riskier? It requires a reliable provider and maintenance, but reduces dependence on a third-party vendor whose prices and limits can change. Well-documented code remains an asset you control.
Can both approaches be combined? Yes, often: iPaaS for secondary low-volume flows, custom API for critical high-volume flows. This hybrid approach optimises cost and performance.
Let's scope your project. Tell us the tools to connect, your operation volume and your horizon, and we'll price the most cost-effective approach (iPaaS, custom or hybrid). Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
