Legacy software modernisation for Singapore businesses
SleekDigital modernises legacy business software for Singapore companies: old in-house systems built in Access, VB6, FoxPro, old PHP, or ASP.NET are rebuilt module by module as modern web and mobile software, with data migrated and AI built into the workflow.
- Typical range
- S$30,000 to S$250,000+
- First module live
- Often within 3 months
- Grant
- Up to 50% EDG for qualifying SMEs
See it work
One request in. Finished work out.
An illustrative run with sample data. The agents read, match, and draft. A person approves before anything leaves the building.
app.yourcompany.sg/legacy-software-modernisation/rules
- Rules agentREADING
- Documents agentWRITING
- Review agentCHECKING
AI prepares the work. Your team stays in control.
Ask your team to handle a workflow...
Writing the register.
Rules v1 · Sample
- Volume break above 50 unitsConfirmed
- Contract customers skip promoConfirmed
- Rounding to nearest 5 centsConfirmed
- Extra 3% for 'GOLD' accountsUndocumented
- Free delivery above S$800Undocumented
Hidden logic surfaces before the rebuild, not after go-live.






The shift
From retyping to reviewing
What legacy software modernisation changes for the people doing the work today.
Today
Your team does the typing
- The system runs on one office PC or an old server nobody wants to touch.
- The developer who built it has left, and nobody fully understands the code.
- Staff cannot use it from home, on site, or on a phone.
- Every change is slow and risky, so the business works around it in Excel.
- It cannot connect to Xero, your bank, e-invoicing, or newer tools.
- Security patches stopped years ago.
With AI built in
The system drafts, your team approves
- Documentation of business rules found in the old code and reports
- Test cases built from historical transactions
- Data mapping from old tables to the new model
- In the new system: routine documents such as quotations and orders
What we build
Built around how your team works
Each system is built around your own data, documents, and approval rules, then connected to the software you already run.
System and rule discovery
We document what the old system actually does, including the business rules hidden in code, reports, and spreadsheets around it. AI-assisted code reading speeds this up.
Module-by-module rebuild
Replace one module at a time while the old system keeps running, instead of one risky big-bang switch.
Data migration
Clean, map, and migrate historical data, with reconciliation reports so finance can sign off totals.
Modern web and mobile access
Cloud-hosted software your team can use from the office, on site, or on a phone, with role-based access.
Integrations
Connect to Xero, QuickBooks, SAP Business One, payment gateways, and e-invoicing.
AI built into the new workflow
Where it helps, the new system drafts the routine work, such as quotations, orders, and document filing, for staff to approve.
Human in the loop
AI drafts. Your team approves.
The routine reading, matching, and drafting is done for you. Every decision that matters still has a person's name on it.
The AI drafts
- 01Documentation of business rules found in the old code and reports
- 02Test cases built from historical transactions
- 03Data mapping from old tables to the new model
- 04In the new system: routine documents such as quotations and orders
Your team approves
- Every business rule before it is rebuilt
- Data migration totals and reconciliation
- Each module cut-over
- Retiring the old system
How it works
From scoping to go-live
A short, fixed path. You see it working on your own data before launch.
- 1
Discovery
We review the old system, its data, and the people who use it, then map modules and risks.
- 2
Phased plan and quotation
You receive a phased plan with the order of modules, price, and timeline.
- 3
Rebuild and parallel run
Each module goes live alongside the old system until reports reconcile.
- 4
Cut-over and support
We retire the old module, archive its data, and stay on for support.
FAQ
Common questions
Should we rewrite the old system or replace it with a package?
If a packaged product fits your process with small changes, replacement is usually cheaper. Rebuild when the old system holds workflow or pricing logic that sets you apart, or when packages would force your team into a process that does not fit.
Can we keep using the old system during the project?
Yes. We replace one module at a time and run old and new side by side until the numbers reconcile. Staff move over in stages instead of all at once.
What if nobody knows how the old system works?
That is common. We read the code and data, interview the people who use it, and compare old reports with new ones. AI-assisted code reading helps us document the business rules faster, and every rule is confirmed with your team.
What happens to our historical data?
Historical data is cleaned and migrated, or archived in a searchable form if it is only needed for reference. We agree the approach per table during discovery.
How much does legacy modernisation cost?
Most rebuilds fall between S$30,000 and S$250,000+, depending on the number of modules, data volume, and integrations. A phased plan spreads the cost, and qualifying SMEs may claim up to 50% under the EDG.
hi i'm lester

Get a quotation
Tell us about your workflow and the systems you use today. We reply within 24 hours with next steps.
- Singapore team, founded 2017, 100+ projects
- Written scope and quotation after one call
- Tested on your own documents before launch
- Up to 50% EDG for qualifying SMEs
Prefer email? enquiry@sleekdigital.sg