In many companies the most important program for invoicing, record-keeping or order handling was built years ago — in Delphi, Visual Basic 6 or on PHP4. It works. People know it. The trouble begins when something needs to change, an integration needs adding, or the one person who understood the code leaves. That's when it turns out the company is a hostage to its own system.
What the real pain is
An old app is not just "outdated technology". It's a real business risk that costs money every month, even if it doesn't show up on the invoices.
- No specialists — there are fewer and fewer programmers who know these technologies, and their rates rise every year.
- Every change is a risk — no one knows what will break after touching one fragment, because tests and documentation are missing.
- Security and compliance — old systems often fail to meet today's data protection requirements.
- Isolation — such a program struggles to exchange data with the new tools the company has bought in the meantime.
Path one: maintain
Sometimes the most sensible thing is to not touch what works — provided you do it consciously. Maintenance makes sense when the app is stable, rarely changes and doesn't block the company's growth. The classic problem is that even minor fixes require an expensive specialist who is hard to find. In the ESKOM.AI approach, we first reconstruct the system's documentation and dependency map with the help of dozens of AI agents — what once took a programmer weeks of tedious analysis now comes together in a few days. Thanks to this the company regains control: it knows what it has, and can maintain the system without panic at every call from a user.
Path two: modernise incrementally
This is most often the best choice for an app that is key to the company but has stopped keeping up. Instead of a big "all at once" rewrite — which classically can take a year and cost hundreds of thousands, often ending in failure — we replace the system piece by piece. First the most painful area, then the next, while the old and new parts run side by side. Thanks to automated software development with AI support, each such stage comes together far faster, and most importantly — with a full set of tests (unit, integration, performance, security) confirming that nothing has broken. The company keeps working the whole time, and the risk is spread across small, controlled steps.
Path three: replace
When an app is outdated enough that patching costs more than building a new one, it's worth considering replacement. Classically this is the most expensive and longest road — a project lasting many months with a large team. In the ESKOM.AI approach, AI agents speed up the most labour-intensive stages: analysing the old system, transferring the business rules, preparing and testing the new application. The result is a fraction of the cost and time of a classic project, while preserving everything valuable in the old system — knowledge of the company's processes.
The concrete: how much time and money
Every case is different, but the orders of magnitude speak for themselves. The analysis and documentation of the old system alone, which classically takes several weeks of a specialist's work, shrinks to days with AI support. Incremental modernisation, instead of one risky year-long project, turns into a series of short, measurable stages. And the total cost? Instead of the full rate for the time of expensive programmers, you pay for the work actually done, a substantial part of which is taken over by automation. That's the difference between "we can't afford it" and "we start next month".
Where to start
You don't have to decide the fate of the whole system right away. A single conversation and a short audit is enough to show what state the app is in and which of the three paths makes the most sense for your company — with a concrete estimate of time and cost. ESKOM.AI is a company operating since 2025, combining engineering experience with automated software development. Write to us and let's arrange a free consultation — you'll see that your "old app" doesn't have to be an unsolvable problem.