fully automated Agentic AI Legacy application modernization
The call needs no access to your system. For the free documentation, our team works with read-only access agreed with your engineers.
Legacy production software holds years of business rules. Fabrica records how your legacy app behaves, rebuilds selected workflows on a modern stack and checks them against the live system. Your customers can freely switch between the old and new system with full compatibility.
Our Agentic AI modernization methodology
The modernization and migration is done with no disruption to your production systems. Your team checks the output of each stage before the next one begins.
01 · C
We instrument and capture how the legacy system behaves, including requests, jobs, data flows, reports and rare paths. Anything not yet observed is recorded as a gap.
02 · L
Owners and engineers review the evidence. Once it reaches the coverage and confidence level you agreed, that version of the System Specification is approved and locked.
03 · E
AI agents rebuild the scoped workflow on a modern architecture. Engineers review the changes to ensure security and compliance at the highest industry levels.
04 · A
Both systems are tested against the same specification. We compare outcomes, data, reports, permissions and performance and show you the evidence.
05 · R
Production moves over by workflow or customer cohort, with acceptance criteria and a rollback plan. The next priority starts once the release is complete.
Tell us about it on a 30-minute call. We'll suggest a first scope and what a technical review would need to confirm.
Proof before traffic
A rebuild is only useful if it does what the old system did, including the rules nobody documented. Fabrica tests both implementations against the same specification and shows you the results before any customer is moved.
Illustrative proof report. Each release step is gated on evidence.
Fabrica agents maintain always up to date documentation
Most legacy systems carry rules that exist only in code and in a few people's memory. Fabrica turns observed behavior and owner reviews into requirements your team can read, question and approve. Each requirement links to the change that implements it.
Visibility
The work sits on a board you can open at any time. It shows what is in progress, which role owns it, what it has cost and what is waiting for a person to decide. Spending caps pause work before it overruns.
Ways to start
Both options start with the same 30-minute call to determine which commercial model is best suited.
A fixed-scope assessment of one workflow, followed by a bounded pilot that proves it. If the pilot succeeds, we agree a recurring renewal plan.
A monthly fee for an agreed renewal scope. Your first modernization is included, and upgrades to renewed parts are covered.
Not ready for either?
Start with free legacy application documentation and experience how Fabrica agents work and the path to modernization.
How the free documentation works
Solutions
Growth and strategy
Ship the modernized product alongside while the current system keeps running.
Finance
Make modernization a planned, measurable line of spend.
IT and risk
Lower the risk held in old systems and in the few people who understand them.
Engineering
Specifications, proof results and rollback your engineers can verify.
Who's behind Fabrica
Fabrica is being developed by Thinslices, a product engineering company that has designed, built and scaled software for clients in fintech, insurance, telecoms, publishing and retail.
Trusted by
200+
projects delivered
13+
years building products
160+
engineers, designers and product people
Common questions
No. Keeping a stable system, upgrading it or refactoring a narrow part may be the better investment. Fabrica's approach suits cases where complete or partial replacement is justified, and the first call is where we find out whether yours is one.
Not by default. Parallel builds and incremental replacement work without a whole-system freeze. If a specific scope needs one, we agree what it covers and how long it lasts before work starts. We aim for hours or days for an agreed scope, and a pilot measures the result.
A business leader sponsors the work. Your engineering works with us on scope, evidence and acceptance, and your technical team decides when each workflow moves to production.
Thirty minutes on one business priority, the system behind it and the constraints on changing it. We suggest a first scope at the end of the call. No production access is needed.