Homemade integrations vs. iPaaS: the real cost of “saving” on technology you need to know

26/12/2025

Product
Development

Connecting e-commerce, ERP, CRM and internal systems is as critical today as having a product or stock. But many companies follow the same path: quick scripts made “at home”, cheap plugins and small agencies that promise to “keep everything integrated” in a few weeks. Spoiler: big mistake.

In Excel, that path seems logical: lower initial fee, zero “expensive” licenses, all solved with our own code or a couple of connectors. In practice, That apparent savings end up costing dearly, converted into IT overtime, lost sales, drops on key days and a growing list of “urgent patches” that no one has time to order.

In this article, we focus on the real TCO (Total Cost of Ownership) of home integrations and ad-hoc solutions, and how an iPaaS like Weavee changes the equation in favor of your business.

Why “we do it” is often expensive

Several independent integration analyses agree on the same pattern: building custom integrations takes longer, requires scarce technical profiles and It generates a debt difficult to maintain.

The team of AppsConnect compares custom integrations vs iPaaS and shows that own developments usually require weeks or months, while an integration platform allows deploying reusable connectors in much less time.

Something similar is proposed by CData in its guide”Build vs. Buy: Evaluating Data Integration Approaches”: home integrations give maximum flexibility, but at the cost of assuming the entire life cycle (design, development, documentation, support, evolution) with the internal team.

In parallel, teams that decide to “build everything” usually underestimate three costs that later become critical, such As Nango warns in their analysis of the hidden costs of building integrations in-house:

  • Engineering time: A PoC can be put together in hours, but bringing it to a production standard involves managing errors, reattempts, monitoring, performance and security.

  • Maintenance and incidents: Every change to an API, ERP, or third-party platform opens up a new round of adjustments.

  • Opportunity cost: While the team is supporting integrations, it's not building core functionality or improving the customer experience.

If you add these variables to 3—5 years, the “cheap script” stops being so cheap.

TCO: What you don't see in the initial budget

El TCO (Total Cost of Ownership) it's not limited to the initial bill or the annual license. It includes everything you pay — in money and in time — from when the integration is designed to when it is replaced or shut down.

Articles such as”Why Integration Platforms Offer Superior Total Cost of Ownership (TCO)”, from Initus, detail that custom code and legacy middleware carry a permanent burden: maintenance, specialized personnel, greater risk of failures and difficulty scaling.

From that perspective, the TCO of home integrations includes:

1. Visible direct costs

  • Development hours (internal or outsourced).

  • New developments every time a system changes (ERP, e-commerce, CRM).

  • Recurrent hiring of agencies or freelancers to “put out fires”.

2. Indirect costs (those that are often forgotten)

  • Time for the business team managing incidents, exporting and importing CSV to “correct by hand”.

  • Sales lost due to stock errors, pricing, or checkout failures

  • Impact on the customer experience when an order is not registered, arrives in duplicate or is incorrectly invoiced.

iPaaS studies such as those in Celigo They estimate that an integration platform can reduce integration development times by around 70%, save more than 100 hours a year on manual tasks and significantly cut maintenance efforts by centralizing monitoring and error management.

These are not figures that can be automatically extrapolated to all solutions, but they do set the trend: the real hidden cost of a governed integration is often lower than that of a constellation of scripts.

When the “cheap” plugin becomes technical debt

As we have already explained to you in our article”Hidden costs of middleware: the bill that no one sees (until it's too late)”, analyzing a real case: a popular connector between Odoo ERP and Magento 2 with an average rating of 2.1/5 stars on Trustpilot, and reviews that describe weeks of wasted time, recurring failures after each update and a permanent need for manual adjustments or extra development.

Beyond the one-time supplier, the pattern is clear:

  • Every new version the ERP or the store requires manual patches.

  • There is no centralized monitoring: errors are detected when the customer has already abandoned the cart or when someone discovers that the stock doesn't add up.

  • Scalability is manual: adding a new channel (a marketplace, a second store, a WMS) implies another plugin, with another contract, another learning curve and another point of failure.

In other words: integration ceases to be a business enabler and becomes a constant source of uncertainty.

If you recognize yourself in this scenario, your team is probably already paying a “hidden fee” in the form of overtime, rework and difficult conversations with clients.

What the data says about integration platforms vs. custom code

Returning to the central question —homemade integrations or integration platform? —, public evidence points in one direction:

  • Celigo reports an investment return of 383% and a net present value of $1.1 million over three years for a composite case that adopts its iPaaS, along with a drastic reduction in development times and data errors.

  • Nango insists that the cost of building integrations at home grows quietly: maintenance, scalability, debugging, documentation and support end up competing with the product roadmap and with innovation.

  • Initus summarizes the problem: the combination of custom code and legacy middleware carries a “paralyzing burden” of maintenance and risk of failure, while modern integration platforms reduce operational TCO by standardizing connectors, monitoring flows and automating tasks.

They all come to the same point: The logic of “cheapness” ceases to be so when full TCO is incorporated.

How TCO changes when you work with Weavee

Weavee It's a System Integrator based on Microsoft Azure, capable of connecting e-commerce, ERP and CRM without limits, with real-time monitoring and modular architecture.

In practice, that impacts TCO on several fronts:

1. Pre-configured connectors and Universal Connection

The service of Universal Connection allows you to integrate any system —ERP, CRM, e-commerce, WMS, POS, payment gateways, cloud repositories— without custom developments, acting as the central hub of the ecosystem.

That translates to:

  • Less ad-hoc development: You start from already audited connectors and patterns.

  • Less dispersion: instead of 10 scripts, you have a single panel where you can view and govern all the flows.

  • Fewer surprises: Changes are managed in one place, with clear business rules.

Would you like to take the first step now?

Request a demo!

2. Modular architecture and scalability on Azure

The platform is modular, scalable and based on Microsoft Azure, with autoscaling and real-time monitoring.

That directly impacts TCO:

  • You amortize your initial investment as you add channels (new stores, marketplaces, apps).

  • You avoid having to “redo everything” when the business grows: flows and rules are expanded, the foundations are not changed.

  • You can keep up with peaks in demand (seasons, campaigns, Black Friday) without oversizing your own infrastructure, as we explain in our article”How to prepare your e-commerce for Black Friday: integration and automation to the rescue”, which, if you haven't read yet, we recommend you read as well.

3. Certified Security and Centralized Governance

At Weavee we have safety certifications like ISO 27001, SOC 2 and FedRAMP, and the use of Azure components such as Key Vault and Entra ID to manage identities, encryption in transit (HTTPS/TLS) and secrets.

In terms of TCO, that means:

Signs that your home integrations are already affecting the business

If you need a “thermometer” to know if it's time to review your integration strategy, you can use this checklist:

  1. Your technical team is always in reactive mode: Most of the time is spent “fixing integrations” and not building new features.

  2. Errors are detected late: You learn about problems when customers complain, when the stock doesn't add up or when the ERP shows data that no one can explain.

  3. Adding a channel means starting from scratch: Each new store, marketplace or system takes months to connect and requires new development and testing from scratch.

  4. There is no single monitoring panel: To understand what's going on with an order, you have to log in to three or four different systems, review logs and ask the IT team for help.

  5. The “invisible” bill grows: Overtime, open tickets, different vendors, small contracts with different agencies.

If this sounds familiar, you're paying a high TCO for integrations designed to save in the short term.

From home integrations to governed architecture: how to take the leap

The good news is that you don't have to turn everything off and start from scratch. In our Weavee blog, we have proposed incremental modernization strategies to you.

We recommend that you read these two articles:

Also, a typical good path could be:

  1. Inventory critical integrations and flows
    Identify what today connects e-commerce, ERP, CRM, POS, WMS, payment gateways and internal systems.

  2. Classify by impact and risk
    Where are the highest volume of orders, the greatest financial crisis or the most incidents concentrated?

  3. Migrate high-impact flows to Weavee first
    For example, catalog and stock synchronization between SAP/Oracle NetSuite/Microsoft Dynamics and your e-commerce, or CRM integration (Salesforce, HubSpot, Zoho) to unify customers and leads

  4. Activate centralized monitoring and alerts
    Go from “finding out about complaints” to detecting faults in (almost) real time, from a single control panel.

  5. Gradually turn off legacy scripts and plugins
    Once flows are stable in Weavee, homemade integrations are deactivated and the risk surface is reduced.

Next step: measure your own TCO with Weavee

Third-party studies show a clear direction: homemade integrations and “cheap” middleware often have a higher TCO than a well-designed integration platform. But the most important decision is that of your organization and your numbers.

From Weavee You can:

  • Review your map of current systems and flows.

  • Estimate the TCO of continuing with home integrations vs. migrating to an architecture based on Universal Connection.

  • Design a phased transition plan, prioritizing the processes that have the most impact on sales and customer experience.

If you want to explore specific scenarios for your company, you can speak directly with the Weavee team through the page of Contact.

That's where today's “savings” ceases to be tomorrow's problem, and becomes a competitive advantage: less chaos of integrations, more focus on growing the business.

Would you like to take the first step now?

Request a demo!

About our cookies

By continuing to use this site, you are giving your consent for us to use cookies. Learn more.

Conoce más
understood