Custom software or generic SaaS?
Everything you need to choose between custom software and an off-the-shelf SaaS: process fit, real cost, code ownership, business AI, timelines.
In short
In short: a generic SaaS is fast to deploy but never covers 100% of your needs and locks you into a vendor. Custom software fits your exact processes, makes you the owner of the code, and often costs less over three years once you add up your SaaS subscriptions, the hours lost working around them, and duplicate-entry errors.
The comparison, point by point
| Generic SaaS | Custom software | |
|---|---|---|
| Fit to your processes | You adapt your teams to the tool | The tool fits your processes |
| Coverage of your needs | ~60% on average | 100% of the defined scope |
| Code ownership | The vendor | You, 100% |
| 3-year cost | Subscriptions + side tools + lost hours | Often lower once everything is added up |
| Roadmap | The vendor's priorities | Your priorities, when you want them |
| Your data | Hosted by the vendor | Stays with you |
| Business AI | Generic 'AI-powered' badge | AI where it creates real value |
| Vendor dependency | High (lock-in) | None (source code handed over) |
| Time to start | Immediate | First working version in a few weeks |
Frequently asked questions
Custom software or SaaS: which should I choose?
Choose a generic SaaS when your need is standard and marginal to your business. Choose custom software when a process is core to your business, when no tool covers it properly, or when you juggle several tools that don't talk to each other. Custom software fits your exact workflows instead of forcing you to adapt to someone else's.
Is custom software more expensive than a SaaS?
Not over the full lifetime. The right comparison is not the monthly subscription alone but the total cost: your SaaS licenses plus the side tools, plus the hours your team loses working around the software, plus duplicate-entry errors and scattered data. Over three years, custom software is almost always cheaper — and you own it at the end.
Who owns the code of a custom software?
You do, 100%. With custom software the source code belongs to you at delivery, with no dependency on the provider for it to keep running. That is the opposite of a SaaS, where the vendor owns the product and you only rent access.
How long does it take to deliver custom software?
A first working version is available in a few weeks, not 18 months. Development runs in short cycles with visible milestones, so you use an early version quickly and it grows from there.
What happens if the provider disappears?
You keep your software. Because you own the source code and your data stays with you, the software keeps running with no dependency on the original provider. Any competent team can maintain a documented, modern stack.
Can AI be integrated into custom business software?
Yes, and that is where custom software has a decisive edge. Instead of a generic 'AI-powered' badge, AI is embedded exactly where it creates value for your business: automated tender responses, quotes generated from a brief, lead scoring, document analysis, predictive pipeline analysis.
Why do generic SaaS tools fail in specialized sectors?
Because a SaaS is built for everyone, so for no one in particular. In sectors like construction, private security, industry, logistics, healthcare or equestrian, business rules are specific. A generic SaaS covers roughly 60% of the need, and teams fill the gap with Excel and manual exports.
For which companies is custom software worthwhile?
Mainly SMEs with solid revenue whose core processes are poorly served by existing SaaS, who juggle several tools that don't connect, or who run manual Excel exports daily. The more central and specific the process, the higher the return on custom software.
Can we replace several SaaS tools with a single custom software?
Yes. One of the strongest reasons to go custom is to unify tools that don't talk to each other into a single system built around your workflow. That removes duplicate entry, scattered data, and the manual exports between tools.