proprietary software
Proprietary Software is a program a company builds, owns and locks up, so you can use it but you cannot see, copy or change what runs inside it.
In plain English
"Why can't I just get the source code and tweak it myself?" Adaeze asked the vendor on the phone, frustrated that the inventory software her shop used would not let her add a Yoruba language option.
"Because it's proprietary, ma. We own the code. You have a licence to use it, not a copy to keep," the support agent replied, calm as ever, like he had said this line a hundred times that week.
That is the whole idea of proprietary software in one exchange. A company writes a program, keeps the source code locked away, and sells or rents you the right to use the finished product. You get the app, the dashboard, the results. You never get to open the hood.
Microsoft Word works this way, and so does most banking software running in Nigerian branches, from Lagos to Kano. You pay for a licence, Microsoft keeps the blueprint. Compare that to something like Linux, which is open source, where anyone can read and change the code for free.
A Nigerian fintech founder building a lending app often chooses to make their scoring algorithm proprietary on purpose. It becomes a private advantage, something a competitor cannot simply copy from GitHub, which matters a lot when you are trying to raise money from a strategic investor who wants to know what stops another founder doing the same thing next month.
For someone in London running payroll for a small Nigerian owned care home business, the payroll software they buy is proprietary too. They trust it to calculate tax correctly, but they will never see the formula inside.
A Nigerian edtech startup pays a software company ₦3,500,000 a year to licence a proprietary exam grading engine, using it freely but never owning or altering the underlying code.
Questions people ask
Is proprietary software the same as expensive software?
No. Some proprietary software is free to use, like many mobile apps, but the company still owns the code and controls what you can do with it. The cost and the ownership are two different things.
Can a small business survive using only proprietary software?
Yes, most do. The trade off is convenience and support now, against being tied to that vendor's prices and rules later, which is worth knowing before you build your whole operation around one tool.
Why would a startup choose proprietary software instead of open source for its own product?
Because locking the code away protects the idea from being copied easily by a competitor, which can matter a great deal when investors are judging how defensible the business really is.
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