The honest fork every founder hits: subscribe to a product someone else built, or pay a team to build what fits. Real cost math, when each wins, and the five questions that settle it.
Every founder runs into the same fork at some point. You have a business problem, and two ways to solve it with software. You can subscribe to a product someone else already built, or you can pay a team to build something that fits your business exactly. Both sound reasonable. Both get sold hard. And the wrong choice costs either money or months.
I write this from the vendor side. GlobeSoft is a China-based software company with 40-plus engineers and more than 300 delivered projects, and we build custom software for a living. So you might expect me to argue for custom in every case. I don't. A big part of what we tell clients is when they should not hire us, and subscribe to a SaaS product instead. This guide is the honest version of that conversation.
If you already know you want to build, start with our breakdown of where the money goes in a custom software project. If you are still on the fence, read on.
The two options look similar from the outside. They are not.
A SaaS product is a finished piece of software that many companies rent at once. You pay a subscription, usually per user per month, and you get a product with a fixed feature set, regular updates, and someone else running the servers. You configure it. You do not change how it works. If the product does 80 percent of what you need, that last 20 percent is either a workaround or a wish.
Custom software is a system built for your business alone. You decide what it does, how it looks, and how it connects to the rest of your operations. You own the code and the data. You also own the responsibility of keeping it running and improving it. It costs more up front and takes longer to get into your hands.
The real question is rarely "which is better." It is "which one matches how your business actually works." The answer changes by company, and even by department within a company.
SaaS pricing is simple and predictable, which is its biggest selling point. A mid-market business tool commonly runs somewhere in the range of $50 to $200 per user per month, with higher-ticket platforms going well past that. A team of 20 people on a $100-per-seat tool is $24,000 a year. Ten seats on a cheap tool is a rounding error on most budgets. The cost scales with headcount, so growth makes the bill grow too.
Custom software is a capital expense instead of an operating one. A focused first version built by a small senior team typically lands between $30,000 and $120,000 depending on scope. Larger systems with integrations, compliance requirements, or multiple user roles run into the hundreds of thousands. Then there is maintenance, which most people forget to budget: a typical figure is 15 to 20 percent of the build cost per year for hosting, updates, and fixes. We break those numbers down in what software maintenance actually costs.
Here is the same decision on a five-year horizon for a hypothetical team of 25:
| Option | Year 1 | Years 2-5 (each) | Five-year total |
|---|---|---|---|
| SaaS at $100/seat/month | ~$30,000 | ~$30,000 and rising with headcount | ~$150,000+ |
| Custom build (small senior team) | $60,000-120,000 | $9,000-24,000 | $100,000-200,000 |
Two things jump out of that table. First, the totals are closer than most people expect once you look past year one. Second, the SaaS line keeps climbing every time you hire, while the custom line only climbs when you choose to change something.
That table is not the whole story. Cost is one axis. The other two are fit and control, and they usually decide the question faster than money does.
Subscribe when your problem is a commodity. If thousands of other companies have the same problem and the market already solved it well, do not rebuild it.
The clearest cases are the back-office basics: email, CRM for a standard sales team, accounting, payroll, project management, support ticketing. These are solved problems. The leading products are mature, well-documented, and cheap relative to the time they save. A founder who builds their own project management tool because the existing one "isn't quite right" has usually spent six figures to learn that the existing one was fine.
SaaS also wins when you need to move today. You can have a CRM or an email tool running this afternoon. A custom build is weeks of discovery and months of development. If speed-to-value is the whole point, the subscription wins on day one.
Finally, SaaS wins when you don't want to own software. Running a system means patches, backups, security, and a relationship with whoever built it. Some companies would rather pay a subscription and never think about any of that. That preference is legitimate. Just be honest that you are paying for it.
Build when the software is the business, not a tool the business uses.
If your product is the software you sell to customers, you almost always build it. A SaaS product you can't modify is a product you can't differentiate, and a business built on a rented platform is a business with a landlord. The marketplace, booking, lending, or trading platform you sell is not a commodity. It is the thing that makes customers choose you.
Build when no product on the market does what you need. This happens more often than people expect in operations-heavy businesses. A property manager with a specific rent-collection and maintenance workflow, a logistics company with unusual routing rules, a manufacturer with a custom ERP process — these teams usually find that the generic product covers 70 percent and the last 30 percent is where all the actual work lives. At that point the workaround becomes the system, and the system becomes a liability.
Build when integration is the point. If the software has to talk to three internal systems and a bank, and the data has to flow a specific way, a SaaS tool with a fixed API often forces you to change your processes to fit the tool. Custom software fits the tool to the process instead.
Build when the data is yours to keep and the compliance is yours to carry. Regulated industries, payment handling, and anything with sensitive customer data often can't sit on a shared multi-tenant platform. Our piece on security requirements for FinTech platforms covers why this matters for financial systems.
Rather than weigh a hundred features, walk through these five. They cut the decision down to something a single meeting can resolve.
One: is the software something I sell, or something I use? Sell it, build it. Use it, consider buying it.
Two: does a product already do 90 percent of what I need without a workaround? If yes, buy it and move on. The 10 percent gap is rarely worth a six-month build.
Three: does the last 10 percent sit in the exact process that makes my business different? If the gap is your differentiator, the calculus flips. A generic CRM is fine for a generic sales team. If your sales process is the reason customers pick you, a generic CRM is a straightjacket.
Four: will this still fit in three years? SaaS scales by seat, not by fit. If you already know the roadmap needs features the vendor will never build, you are renting a ceiling.
Five: who owns the code and the data when something goes wrong? With SaaS the answer is someone else, and "someone else" has a contract. That is fine until it isn't.
If you land on "build," the next step is getting a realistic estimate rather than a guess. We wrote a practical walk-through in how to estimate a custom software project, and our guide to what goes into a custom software build explains what a proper proposal should include.
The choice is not always binary. There are two honest options between "buy the SaaS" and "build from scratch."
The first is buy-and-integrate. Subscribe to the SaaS product for the commodity parts and build a thin custom layer around it for the parts that are yours. Plenty of companies run a standard SaaS CRM and a custom quoting engine that feeds it, or a standard accounting tool with a custom reporting layer on top. You get the maintenance-free core and keep your differentiator. We covered how this works in adding AI to existing business software, and the same logic applies to most integrations.
The second is build-then-grow in phases. Start with a small custom build that replaces the single most painful part of the operation, run it alongside the SaaS tools you keep, and expand only where it earns its place. This keeps the up-front number small and lets the market tell you what to build next. Our take on MVP vs full product explains how to cut the first version down to something that still matters.
The trap to avoid is the quiet drift: subscribing to a SaaS tool, building three spreadsheets and a Zapier tangle around it, and discovering a year later that you have a fragile custom system anyway, just one nobody designed. When the workarounds outnumber the features, the subscription is already failing.
Buying when you should have built looks like this: a growing operations team running on a generic tool, with manual exports, a shared spreadsheet of exceptions, and a process that breaks every time someone is on holiday. The subscription is cheap. The labor around it is not, and it never shows up in the software budget.
Building when you should have bought looks like this: a founder who spent six months and $80,000 building a tool that a $50-per-seat product already did better, then discovering they now have a permanent maintenance obligation for a system that was supposed to be a utility. The build was fine. The decision was the problem.
Both mistakes have the same root cause: deciding on price or hype instead of fit. The $50 SaaS seat is not automatically a bargain, and the custom build is not automatically an upgrade. Fit decides, and fit is a business question, not a technology one.
Up front, usually yes. Over five years, not necessarily. SaaS costs scale with every seat you add and never end. Custom software is a capital expense that drops to a maintenance cost once built. For a growing team on a mid-market SaaS tool, the totals can cross over within a few years. We lay out the long-run view in where the money goes in a custom build.
You can, and many companies do. The pain is the data migration and the habit change. Plan for it by keeping your data exportable from day one and by documenting the workarounds you rely on. Those workarounds are the feature list for the future build.
A focused first version from a small senior team commonly runs $30,000 to $120,000 depending on scope. Where the team sits changes the number a lot: a senior engineer through a China-based team runs roughly $5,000 to $8,000 a month against around $12,000 to $16,000 for the same role on a US salary. See what software development costs in China for the full picture.
A scoped first version usually runs three to six months from kickoff to launch; larger systems run nine to twelve. The spread comes from scope and integrations, not from how fast the engineers type. Our timeline guide covers it in how long custom software development takes.
Yes. Buy the SaaS product for the commodity core and build a thin custom layer for the parts that are yours. It gives you the maintenance-free baseline with your differentiator on top, and it is the option most companies under-explore.
GlobeSoft is a software development company founded in 2018, with 40-plus engineers and more than 300 delivered projects for over 100 clients across the US, Brazil, South Africa, and Singapore. We build custom software, mobile apps, SaaS platforms, FinTech systems, ERP and CRM, and AI products on a stack that includes Java, Spring Boot, Go, Python, React, Vue, and Node.
Part of our job is telling you when you should not build, because a subscription you actually use beats a custom system that never ships. If you are weighing the two and want a straight answer on whether your situation is a buy or a build, talk to us about your project. Send us the rough idea and we will help you figure out which side of the fork you are on.
GlobeSoft builds custom software, AI applications, SaaS, FinTech and enterprise systems for clients worldwide. Message us on WhatsApp for the fastest answer, or email us — we typically reply within 24 hours.
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