Why many companies are now choosing custom instead of SaaS
For most of the past decade, the standard advice on “build versus buy” was straightforward: buy.
SaaS was faster to deploy, cheaper upfront and easier to maintain. Building your own software meant a large initial investment, followed by years of engineering costs. In most cases, the total cost of ownership clearly favoured off-the-shelf software.
That is no longer automatically true.
The cost of building and maintaining custom software has fallen significantly. For a growing range of use cases, owning the software can now be more economical over its lifetime than paying ongoing SaaS subscriptions.
There is an important condition, though: custom software still needs experienced engineering oversight. Security, integrations, maintenance and product direction do not disappear just because the code is faster to produce.
What changed?
Three major shifts have reduced the cost of custom software.
AI-assisted development
AI-assisted development has dramatically increased the amount of work an experienced developer can deliver.
Tasks that once took days can often be scaffolded in hours, allowing engineers to spend more time reviewing, refining and solving the difficult parts of the system.
This does not remove the need for skilled developers. It makes skilled developers more productive.
Better software building blocks
Modern applications no longer need to reinvent everything from scratch.
Cloud hosting, managed databases, authentication services, payment platforms, monitoring tools and other infrastructure are now mature, well-supported building blocks.
As a result, custom development is increasingly about combining proven components into a system designed around the business, rather than building every underlying capability yourself.
Automated deployment and operations
Continuous integration, automated testing, infrastructure as code and managed hosting have also reduced the effort required to operate software in production.
Systems that once needed a dedicated operations team can now often be managed by a much smaller, capable engineering team.
Together, these changes have reduced both the upfront cost of building custom software and the ongoing cost of running it.
SaaS has become more expensive in other ways
While custom development has become more efficient, the economics of SaaS have become less attractive for some businesses.
Per-user pricing can grow quickly as a team expands. A platform that feels inexpensive at ten users may become a significant annual cost at one hundred.
Businesses also have limited control over price rises, feature changes, product tiers, acquisitions and discontinued functionality.
Then there is the cost of compromise.
When a business process does not fit the platform, the business may need to:
pay for expensive customisation
add integration tools and middleware
maintain several overlapping platforms
change internal processes to suit the software
None of this means SaaS is a poor choice.
For common business functions with mature, well-fitting products, SaaS can still offer excellent value. The important point is that SaaS should no longer be assumed to be cheaper without doing the comparison.
Compare total cost of ownership, not just build cost
The wrong comparison is:
SaaS subscription versus custom development cost.
The better comparison is the total cost of owning and operating each option over the period the business expects to use it.
For custom software, that includes:
initial design and development
hosting and infrastructure
security and compliance
integrations
ongoing improvements
support and maintenance
For SaaS, it includes:
subscription and per-user fees
implementation and configuration
integrations
paid add-ons
data migration
workarounds and process changes
switching costs and vendor dependency
The initial build is only one part of the custom software equation.
A system that is built once and then ignored will not produce long-term savings. It will gradually accumulate security risks, outdated dependencies and operational problems until it becomes expensive to repair or replace.
Lower development costs make custom software viable. Disciplined engineering ownership keeps it viable.
The four areas that need experienced oversight
Responsible ownership of custom software depends on four ongoing disciplines.
Security
A custom system is your responsibility to secure.
That includes maintaining dependencies, managing authentication and permissions, protecting sensitive information and meeting relevant privacy or regulatory obligations.
Security is not a one-off task. It requires ongoing attention, and the cost of getting it wrong can easily outweigh any development savings.
Roadmap
Software needs to evolve with the organisation.
Someone must decide what should be improved, what should be retired and where future investment will create the most value.
Without clear ownership, even well-built software can slowly stop matching the business it was designed to support.
Integration
One of the greatest advantages of custom software is its ability to connect cleanly with the rest of the organisation’s systems.
That value depends on integrations being deliberately designed, documented and maintained, rather than growing into a collection of fragile scripts and manual workarounds.
Maintenance
Dependencies age. Platforms change. Bugs emerge. Performance can gradually decline.
A modest, consistent maintenance program can keep a system reliable and valuable for many years.
Skipping maintenance is how an economical custom system eventually becomes an expensive rescue project.
Where custom software is becoming more attractive
Custom software is worth serious consideration when:
your process is a genuine competitive advantage
no off-the-shelf product fits the business well
SaaS costs are rising significantly as your team grows
several overlapping platforms could be replaced by one purpose-built system
integrations between existing tools create most of the complexity
data control, privacy or regulatory requirements are particularly important
the business expects to rely on the system for many years
Where requirements are common and well served by the market, SaaS will often remain the better choice.
The decision is not ideological. It should be based on fit, risk and total cost over the expected life of the system.
The bottom line
The economics of the build-versus-buy decision have changed.
Custom software is now a realistic, and sometimes less expensive, alternative to SaaS across a much broader range of use cases.
The key is to treat it as an ongoing business asset, not a one-off development project.
That means having experienced people responsible for security, roadmap, integrations and maintenance throughout the life of the system.
That is the work we do at James Anthony Consulting.
When a business is weighing up custom software against another subscription platform, we help assess the options honestly, including the situations where staying with SaaS is still the right answer.
