Legacy application modernization, without the big-bang rewrite.
Your old system still runs the business, and nobody wants to touch it. We modernize it one module at a time, with the old system running until the last piece moves, and tell you when the right answer is to leave it alone.
Rewrite, refactor, replace, or leave it alone?
Four honest options. We pick one per module, not one for the whole system.
Leave it alone
The system works, nobody is blocked, and the risk is theoretical. Patch it, document it, and spend the money elsewhere. This is the answer more often than agencies admit.
Refactor in place
The architecture is sound but the code has rotted: old framework versions, no tests, security debt. Upgrade and clean up without changing what users see.
Replace it piece by piece
Put a proxy in front, rebuild one module on the new stack, route its traffic across, and repeat. The old system keeps running until the last piece moves.
Rewrite
Only when the old stack is genuinely dead and the domain is well understood. AI-assisted development has made this cheaper than it was, not risk-free.
Old systems we have rebuilt, and still run.
Real systems, with the numbers published on each case study.
Four generations of one platform
EcoMitram, a volunteer project we have engineered since 2020: an adopted Laravel codebase, rebuilt twice, then rewritten again in 2026 on Next.js 15 and NestJS. 600+ commits in five months, AI-assisted, with 1.37M installs depending on it.
Read the EcoMitram case study →Four legacy properties, one platform
ReelAbilities: four drifting WordPress and Elementor properties replaced by one Next.js platform. Page loads went from 4.2s to 0.8s at launch, and we still run it.
Read the ReelAbilities case study →We wrote the legacy, too
Ready Bytes started in 2009 building Joomla extensions. PayPlans ran on 40,000+ websites before it was sold. We know what a decade-old PHP codebase looks like from the inside.
Read our history →How a modernization runs.
Scoped before anything is built, fixed-quoted before you commit.
Read the system before touching it
Code, database, integrations and the jobs nobody remembers scheduling. The surprises live in cron tabs and stored procedures, not in the screens.
Tests around current behaviour
Before anything changes, the important flows get tests that pin down what the system does today, bugs included, so the new version can be checked against them.
One module first, fixed-quote
The smallest valuable slice, rebuilt end to end and live in production, for a fixed quote after scoping. It surfaces the real problems while they are still cheap.
Data migration you can rerun
Scripted, repeatable migrations checked against record counts and spot checks, run many times before the one that counts.
No downtime, no broken URLs
Traffic moves module by module behind a reverse proxy, and every public URL is kept or redirected.
AI where it earns its place
AI-assisted code reading and rewriting, under human review and tests. On EcoMitram we also dropped an AI feature that a plain editor beat. We tell you both kinds of result.
The proxy pattern we use for cutovers is written up in our zero-downtime migration post.
Frequently Asked Questions
Comparing us against other vendors? We wrote an honest comparison of seven legacy modernization agencies — including the reasons to hire someone else.
Tell us what you are running.
The stack, roughly how old it is, and what it is stopping you from doing. We will tell you whether to rewrite, refactor, replace it piece by piece, or leave it alone.