We bridge the gap between old systems and new growth.
Don’t replace your old systems. We build custom modules that connect seamlessly with your existing core data.
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Legal Industry 
The Challenge A NSW law firm faced a failing security audit, looming cyber insurance renewal, and Law Society trust accounting obligations they could not evidence. Legacy antivirus, untested backups, and no detection capability left them exposed to the exact threats targeting legal practices: trust account fraud, business email compromise, and ransomware.
The Solution Extranet Systems deployed a fully managed security stack: EDR, 24/7 SOC, advanced email security, Microsoft 365 and endpoint backup, RMM patching, and independent penetration testing. Each control was mapped directly to an Essential Eight, ISO 27001, or Law Society requirement. No shelfware. No over-engineering.
The Outcome The firm uplifted to Essential Eight Maturity Level 2, closed their ISO 27001 control gaps, evidenced trust accounting compliance for the Law Society of NSW, and renewed cyber insurance at improved terms. Zero successful phishing or BEC incidents since go-live.
Hear from satisfied business owners and executives who've trusted Extranet Systems with their business challenges.
Extranet Systems provides very professional service on fulfilling our IT requirements. Having them on board really reduced a lot of our stress on looking after the IT infrastructure.
Working with Extranet Systems, their Software development, and integration with two of our other Software platforms went very smoothly, they were able to come back with something in no time.
We recently engaged Extranet Systems to help implement AI into our business. They were very professional and had constant communication throughout the entire project.
Extranet gave us a level of integration we didn't think was possible. Night and day difference. Thank you Extranet.
We start by listening. Requirements gathering shapes everything that follows. Then we design, build, test, deploy, and stay with you to keep your software evolving as your business grows.
We dig into how your business actually works. The workflows, the friction points, the goals. From there, we map the solution, agree on scope and success metrics, and shape a build plan with no surprises down the track.
Our developers bring it to life with clean code, regular check-ins, and rigorous testing at every stage. Once you’re live, we handle hosting, maintenance, and ongoing improvements so your software keeps pace with your business.
From web and mobile to enterprise systems — we build software that fits your business at every scale.
New software doesn't exist in isolation. We connect it to your existing systems so data flows freely and nothing breaks in the process.
Unlock your unfair advantage with our passionate suite of custom software solutions designed to make your business run smoother.
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Everything you need to know about building custom software with us
Timelines depend on the complexity and scope of the project, but most builds run between 8 and 24 weeks from kickoff to launch. We break the work into clear phases with regular milestones, so you always know what's being delivered and when.
Cost depends on complexity, timeline, and the team size required. We provide detailed fixed-price proposals after a discovery session so there are no surprises.
× Yes — 100%. You own the intellectual property, the codebase, and all the assets we build for you. We hand over everything at the end of the project.
Yes. We regularly integrate with third-party platforms including CRMs, ERPs, payment gateways, and legacy systems. If it has an API, we can connect to it.
We offer ongoing support retainers, regular maintenance, and continuous improvement sprints. Most clients stay with us long after launch.
