Your business has outgrown the Excel sheet. Stock numbers do not match, two people edit the same file, and the month-end report takes a whole weekend. Now you are told to "buy Tally", "try Zoho", "use free open source software" or "get something custom built", and each option sounds right when someone else explains it.
This guide puts open source vs proprietary software side by side for a growing business, with custom-built software as the third choice. You will see what each one really costs, what you own at the end, and the questions to ask before you sign anything.
Quick answer
What is the difference between open source and proprietary software?
Open source software comes with its code and a licence that lets you use, change and share it. Proprietary software is owned by a company that sells you the right to use it, but keeps the code closed. The real difference for a business is control: who can change the software, and who decides its future.
What open source really means
The Open Source Initiative (OSI), which keeps the official definition, says open source "doesn't just mean access to the source code". The licence must allow free redistribution, must include the source code, and must allow changes. It also cannot stop any person, group or type of business from using it.
OSI keeps a list of approved licences, such as MIT, Apache 2.0 and the GPL family. WordPress, the website software, is released under the GPLv2 (or later) licence. That is why you can install it without paying a licence fee.
What proprietary means in daily use
With proprietary software you pay for a licence or a subscription, and the vendor controls updates, features and price changes. You get a finished product and support from one company. You cannot fix a missing feature yourself; you wait for the vendor or work around it.
Open source software for business: is it really free?
The licence is often free, but running the software is not. Someone has to install it, host it on a server (a rented computer that keeps it online), take backups, apply security updates and fix problems. If nobody in your team can do that, you pay a developer or a hosting company instead.
Where open source works well
Where it can hurt
Paid off-the-shelf software: Tally, Zoho Books and Excel
Ready-made tools are the fastest way to get organised. You sign up, enter your data and start billing the same week. The trade-off is that your process has to fit the software, not the other way round.
| Product (India) | Price as of October 2026 | Good to know |
| TallyPrime Silver (one PC) | Rs 22,500 + 18% GST one-time, or Rs 750 + GST per month rental | Lifetime licence includes one year of Tally Software Services |
| TallyPrime Gold (multi-user on a local network) | Rs 67,500 + 18% GST one-time, or Rs 2,250 + GST per month rental | For several PCs in one office |
| Zoho Books Free | Rs 0 if yearly revenue is up to Rs 25 lakh | 1 user plus 1 accountant, up to 1,000 invoices a year |
| Zoho Books Standard | Rs 749 a month billed yearly, or Rs 899 monthly, plus taxes | Higher plans add more invoices and users |
Prices change often, so check the vendor's own page on the day you buy. Also ask what the renewal costs after the first year, since that is the number you will pay every year after. Excel works for a single person, but it was never built for many people entering stock and orders at the same time.
The lock-in question
Lock-in means it becomes hard or costly to leave a product. With any paid tool, your data lives in their format.
Before you commit, export a sample of customers, items and invoices to Excel or CSV and see if it is complete. If you cannot get your data out easily, leaving later will be painful.
Custom software vs off the shelf: when does custom make sense?
Custom software makes sense when your process is what makes you money and no ready tool fits it without daily workarounds. It also fits when you are paying for several tools that do not talk to each other. If a standard tool fits most of your work, start there.
Real examples from our work
A jewellery business, Vishnu Jewellers, ran its stock, orders and customers on spreadsheets and paper registers. Reports took 3 to 5 hours to compile by hand, and design photos sat in WhatsApp chats. We built a single inventory system, and the cataloguing work itself uncovered over Rs 3 lakh in forgotten dead stock.
A manufacturer, Bang Diamond Tools, tracked sales enquiries in Excel and emailed purchase requests between departments. Monthly reports meant pulling data from five sources over two days. We built a custom system covering sales, purchase, production, stock and quality checks, where admins can change form fields and approval steps without a developer.
Custom does not always mean replacing everything. For HRDYAM, our custom platform sends enquiries straight into Zoho CRM and Google Sheets at the same time. The paid tool stays, and the custom part connects it to the rest of the business.
If your work looks like this, start with The Beyond Horizon's custom software for billing, inventory and moving off Excel. Ask any team you speak to for a written scope before any price.
Open source vs proprietary software vs custom: side by side
Here is the whole open source vs proprietary software choice in one view, with custom work added. Read it row by row and mark which answer matters most to you.
| Question | Open source | Paid off-the-shelf | Custom built |
| Licence cost | Usually none | One-time or monthly fee | None, but you pay to build |
| Setup and running | You or your developer | Vendor does most of it | Your developer, then you |
| Fits your process | Can be changed by a developer | You adapt to it | Built around it |
| Who controls changes | Anyone with the skills | The vendor | You |
| Main risk | Nobody maintaining it | Price rises, lock-in | Poor builder, unclear scope |
How to choose: 6 questions to ask
- Which work makes you money, and which is routine like GST billing? Buy for routine work, build for the rest.
- How many people will use it, and from where? This decides single-PC tools versus online tools.
- Can you export all your data in a common format, today, without asking anyone?
- Who will install updates and take backups every month? Write a name down.
- For custom work, does the contract say you own the code, the domain and the hosting account?
- What will it cost over three years, including fees, hosting, support and staff time, not just the first bill?
Never sign for custom software without a written clause that the code and data belong to you. Without it, you may have to pay the builder again just to move.
Your next step
Write down the three tasks that waste the most time in your week, and which tool each one sits in today. If you want a second opinion on whether to buy, use open source or build, call or WhatsApp The Beyond Horizon on +91 75973 92744.