---
type: Hub
title: Technical due diligence and software audits
description: An independent review of a software system before you buy it, take it over or rebuild it. See what we review and what you receive.
resource: https://nationaldigital.com.au/software-support/technical-due-diligence/
tags:
  - software-support
  - Software support and modernisation
  - Technical due diligence
  - Software audits
  - software audit
  - code audit Australia
  - software due diligence
  - platform health check
timestamp: "2026-11-10T12:00:00.000Z"
language: en-AU
publisher: National Digital
author: National Digital engineering team
readingTimeMinutes: 2
wordCount: 229
datePublished: "2026-11-10"
dateModified: "2026-11-10"
pillar: software_support
canonical: https://nationaldigital.com.au/software-support/technical-due-diligence/
sourceCount: 1
---

*Hub · 0 guides*

# Technical due diligence and software audits

An independent review of a software system before you buy it, take it over or rebuild it. See what we review and what you receive.

**Where this hub sits** · 2 of 22 areas

Areas this page covers

- Cloud, security & support
- Technical audit

[Open the full map on the homepage](/#systems-map-hero)

**Quick answer:** National Digital reviews the code, infrastructure, security and documentation of an existing software system before a purchase, a handover or a rebuild, and reports what to fix first.

*Last updated 10 November 2026*

*Quick answer*

## What does technical due diligence on a software system involve?

*High confidence · Verified 10 Nov 2026*

Technical due diligence is an independent review of a system's code, infrastructure, security and documentation, delivered as a written report that ranks what to fix first. It is done before a purchase, a handover to a new provider or a decision to rebuild.

**Additional Context:** The review looks at the system as it runs today, including the parts its documentation does not describe.

### Sources

- [Cloud Security Guidance](https://www.cyber.gov.au/resources-business-and-government/maintaining-devices-and-systems/cloud-security-guidance) — ACSC guidance on configuring and operating cloud services securely.

*Technical due diligence*

## What this hub covers

A technical due diligence review covers the code, the infrastructure it runs on, its security and the documentation that describes it. The report names the risks in order and says which are cheap to fix and which need a rebuild. Buyers use it before an acquisition, and owners use it before handing a system to a new provider.

## Delivered work

National Digital ran security reviews across a set of applications it first built between 2019 and 2022 ([service](/services/platform-health-check/)).

## Where to start

The [Platform Health Check](/services/platform-health-check/) is the review described here. It costs $3,950 ([Platform Health Check](/services/platform-health-check/)), ex GST. What follows from it is a first quarter of fixes under [application support](/software-support/application-support/), or a staged replacement under [legacy modernisation](/software-support/legacy-modernisation/).

Written by National Digital engineering team

*Next steps*

## Two ways to get a number.

### Get a range now

Seven questions, an instant cost range. No email address, no callback.

[Estimate your project](/estimate/)

### Find out what condition it is in

A Platform Health Check is a fixed $3,950 review of the code, infrastructure, security posture and documentation, ending in a written report and one recommendation. The fee is credited in full against a rebuild that proceeds within 90 days.

[See the Platform Health Check](/services/platform-health-check/)

## Talk to us about reviewing a system

Tell us which system you want reviewed and what decision the review informs.

## Related

**Parent:**

- [Software support and modernisation for Australian businesses](/okf/software-support.md)

# Citations

1. [Cloud Security Guidance](https://www.cyber.gov.au/resources-business-and-government/maintaining-devices-and-systems/cloud-security-guidance) — ACSC guidance on configuring and operating cloud services securely.