Your application still works. But the framework is no longer supported, the original developer is gone, or the code was never documented. Adding a feature feels risky. Finding someone who can work on it gets harder every year.
For years, moving an old application cost too much to justify. AI now helps us read and understand an undocumented codebase faster. Our engineers use that understanding to rebuild the application on a supported stack while retaining the features and workflows your business relies on.
Systenics has built software for 20 years. We assess the existing application, stabilize it where needed, migrate it in careful phases, test the new version against the old one, and hand over code you own. Because the migrated application is software we rebuilt, you can also choose ongoing support from the same team.
Owners usually come to us with one of these problems:
The application still does its job, but its framework no longer receives support. Adding a feature, fixing a bug, or meeting a new security requirement has become difficult.
The original developer is unavailable, the code was never properly documented, and important business rules live inside a system nobody fully understands.
The application matters too much to risk a careless change. That leaves the business stuck with the same limitations while the cost and risk of waiting continue to grow.
The current application cannot connect cleanly to the tools you need or support the changes your team wants to make.
Working software can still hold a business back. If nobody can maintain it, document it, or extend it safely, it needs a plan before a live failure forces the issue.
If your application is broken in production now, see Rescue / Rebuild. Modernize is for an application that still works but is unsupported, undocumented, or unable to grow. Both paths start with a Diagnosis call.
The work follows a careful sequence:
On the Diagnosis call, we learn what the application does, what is holding it back, and what outcome the business needs. The answer may be to migrate, rebuild, keep, or retire it. If modernization is the right path, a separate scoping step determines the work, phases, and price before the build begins.
If the current application is fragile or undocumented, we first capture its business rules and make it stable enough to migrate safely.
We rebuild the application on a modern, supported stack while carrying forward the known features and workflows your team depends on.
We compare the modernized version with the old application, workflow by workflow. We document and resolve edge cases instead of assuming an automated conversion got everything right.
The code lives in your repository, with documentation a competent developer can follow. You are not locked in to Systenics.
Because the migrated application is software Systenics rebuilt, it qualifies for our optional Support & Managed retainer. That covers agreed monitoring, security patching, upgrades, and ongoing maintenance. We do not offer this retainer for unrelated third-party software.
The same team stays responsible from assessment through handover. If you choose support, that team can stay with the application after launch.
We use AI to help read the codebase, then our engineers map what the application does, what it depends on, and where the risks are. You receive a written recommendation before migration work starts.
We agree on what the modernized application must do, which workflows must remain, and how the work should be divided. This scoping step determines pricing, starting from $5K, and produces fixed-scope phases.
Where the current application is fragile or unclear, we document its business rules and stabilize it before carrying those rules into the new version.
We rebuild the application on a supported stack. AI speeds up code analysis and conversion; our engineers review the work and keep the known features the business relies on.
We compare the new application with the old one across real workflows and data. Any undocumented edge cases we uncover are raised and resolved rather than quietly dropped.
You receive the code in your repository with documentation. Because Systenics rebuilt the application, you may also choose an ongoing support retainer with the team that completed the migration.
| The old, unsupported system | A properly modernized system | |
|---|---|---|
| Security | The framework no longer receives the patches or updates it once did. | The application runs on a supported stack that can receive current patches and updates. |
| Maintenance | Knowledge is trapped in old code or with a developer who is no longer available. | The code is documented and readable by competent developers. |
| Growth | New features, integrations, and AI work are difficult or too risky to add. | The application can change as the business changes. |
| Upgrades | Every year on the unsupported framework makes the next change harder. | The application has a supported foundation and a practical upgrade path. |
| Ownership | The business depends on code nobody can confidently manage. | You own the code in your repository and receive the documentation. |
| Support | There may be nobody responsible for what happens next. | Because Systenics rebuilt it, you can choose support from the team that knows the application. |
The framework no longer receives the patches or updates it once did.
The application runs on a supported stack that can receive current patches and updates.
Knowledge is trapped in old code or with a developer who is no longer available.
The code is documented and readable by competent developers.
New features, integrations, and AI work are difficult or too risky to add.
The application can change as the business changes.
Every year on the unsupported framework makes the next change harder.
The application has a supported foundation and a practical upgrade path.
The business depends on code nobody can confidently manage.
You own the code in your repository and receive the documentation.
There may be nobody responsible for what happens next.
Because Systenics rebuilt it, you can choose support from the team that knows the application.
Modernization keeps the business value in the existing application while replacing the unsupported foundation underneath it.
A 20-year track record 20 years of building, scaling, and supporting software that runs other businesses, for clients including Building Detroit, IITJobs, Pedigree Sales, HomeSale.Plus, and others.
I contracted with Systenics about 6 months ago, in an effort to customize auction software for a new company I am launching in the US. The entire process was as smooth as could be. Their estimate for the project was reasonable, and very close to the final number. I have so much confidence in their ability to work with me, I even agreed to a support agreement with them long term.
Systenics builds and maintains three live products: CSV Normalize, Bank Statements CSV, and Card Statement CSV. They handle real customer files and require the same ongoing attention we offer after a rebuild. We do not have an approved migration case study to show here, so we will not invent one.
Turns messy, inconsistently formatted CSV data into a clean, standardized structure, with automated column mapping and data cleanup instead of manual spreadsheet wrangling.
Try it live ↗
Converts PDF bank statements into accurate CSV files in seconds. Built for accountants and bookkeepers who were previously retyping transaction data by hand.
Try it live ↗
Extracts transaction data from PDF credit card statements into clean CSV output. Files are processed briefly and deleted afterward.
Try it live ↗We would rather give you an honest answer than sell you a migration you do not need. We are probably not the right fit if:
If the application still runs the business but is unsupported, undocumented, or unable to grow, book a Diagnosis call. We will help you decide whether to migrate, rebuild, keep, or retire it.
We begin by identifying the known features, workflows, and business rules that must carry forward. We test the modernized application against them before handover. Old applications can contain undocumented edge cases, so we raise what we find and resolve it with you rather than promising perfect parity before we have assessed the system.
Rescue / Rebuild is for an application that is broken in production now. Modernize is for an application that still works but is unsupported, undocumented, or unable to grow. Both start with a Diagnosis call so we can route you to the right path.
AI helps us read old code and accelerate parts of the conversion. Engineers still map the business rules, review the rebuilt application, and test its behavior. The migration is AI-assisted and human-verified.
Modernization starts from $5K, but there is a scoping step first that determines pricing based on the future outcome. We assess what the modernized application must do, what needs to be retained, how much of the current system is undocumented, and where the data risks are. You receive the scope and price before committing to a fixed-scope phase.
The timeline depends on the application, its data, and how much of its behavior is undocumented. We provide a timeline after assessment and scoping. Larger migrations are divided into phases so the scope and result of each stage are clear.
That is usually the plan. We assess the current application first, stabilize it where needed, and plan the changeover around the way the business uses it. The exact approach and any interruption risk are explained during scoping rather than hidden behind a blanket promise.
Yes, if Systenics completed the migration. A migrated application is software we rebuilt, so it qualifies for our optional Support & Managed retainer covering the agreed monitoring, security patching, upgrades, and maintenance. We do not provide this retainer for unrelated third-party applications.
We will tell you. The sensible answer may be to keep the current application, replace it with an existing product, retire it, use Rescue for a live production failure, or start a new Build. The Diagnosis call exists to make that decision before you spend on the wrong work.
There is a scoping step first that determines pricing based on the future outcome. We define what the modernized application must do, what must carry forward, and how the work should be divided. You then receive openly priced, fixed-scope phases before committing to the build.
Book a Diagnosis call↗Tell us what the old application does, who depends on it, and what it is stopping you from changing. On a free 30-minute call, we will listen, ask practical questions, and tell you whether the next step looks like migration, rebuild, keeping the system, or retiring it.
If modernization is the right path, a separate scoping step determines the future outcome, fixed-scope phases, timeline, and price. Modernization starts from $5K. You receive a written recommendation or estimate after the call, whether or not you hire us.