Modernise without starting over.
We extract, replicate, and extend your legacy system's feature set on a modern, fully tested tech stack. Get maximum value from the IP you've already built, and upgrade your old systems with confidence.
starts with a chat.
From old codebase to modern platform.
How we turn a legacy system into something you can build on again. Most projects combine a few of these.
Extract & document the features
We map what your legacy system actually does, including the undocumented logic everyone quietly relies on.
Replicate on a modern stack
We rebuild the proven feature set on current, well-supported technology you can hire for and keep extending.
Extend what it could never do
Modernising is the moment to add the capabilities your old system was never able to support.
Full test coverage
Automated and manual test suites, so the new system is verifiably correct and safe to keep changing.
Data migration & integrations
Bring your history across and reconnect the systems your legacy app talked to.
Keep your IP
Carry forward the value already encoded in your system, and own the modern codebase outright.
Upgrade with confidence.
Modernising a system you depend on is risky if it's done as one big rewrite. Here's how we de-risk it.
Modernise without the rewrite gamble
We replicate proven behaviour first, then extend, so you upgrade with confidence instead of a big-bang rewrite.
Maximum value from your IP
Your legacy system encodes years of hard-won logic. We carry that value forward rather than throw it away.
Verifiably correct
Full test coverage means the modern system does what the old one did, provably, before you switch over.
What does it cost?
Legacy modernisation scales with the size of the system. Here's roughly where most engagements land.
Starter
From $30k / build
A single module or service modernised and covered with tests.
Growth
$100k / build
A core system replicated on a modern stack, with migration and integrations.
Enterprise
$250k+ / build
Full legacy platform modernisation across the business.
Don't want the big CapEx spend up front?
Talk to us about our Bespoke SaaS delivery model — all the benefits of custom software, paid monthly, with full IP handover at the end of the term.
Stuck on a system you've outgrown?
Tell us about the legacy software holding you back. We'll show you what it would take to modernise it, and what it would cost.
Legacy systems, modernised.
Broker Engine
Stuck in an expensive Microsoft Dynamics CRM, Broker Engine moved off the platform onto a custom build and saved hundreds of thousands in annual license fees. The result is what many consider Australia's best CRM for mortgage brokers, with a 92% NPS.
Life Supports
Life Supports came to us after a failed Salesforce installation. They manage phone-based leads on behalf of other businesses, a workflow poorly suited to common CRMs. A tailor-made replacement saved over 10 minutes per call, letting them scale without adding staff.
Changing our whole business was risky. To be honest, I don't know if we could have done it without Alliance.
Jonathan Plowright
Founder & CEO, Typsy
Let's build something
great together.
Every great project starts with a conversation. Tell us what you're working on and we'll figure out the best way to help.
Or call us on 03 9955 7000