Custom Software Development Agencies in Australia

46 custom software development agencies are listed in Australia. 6 have been assessed on the Agency List Score as of September 2026; the highest-ranked is OptiSol Business Solutions at 78.3.

Ranked · 5 of 6 assessed

Ordered by Agency List Score
#1 of 6 assessed
OptiSol Business Solutions
78
Verified

Generative AI and modernization for scalable digital solutions

Data Hygiene and SyncHubSpot ImplementationLead Routing and Enrichment
#2 of 6 assessed
Microknot
74
Verified

Custom software development with cloud-native and agile methodologies

Application Development
#3 of 6 assessed
SupportSoft Technologies
74
Verified

Develops scalable apps and software for diverse industries

Application DevelopmentData Engineering PipelinesDevSecOps Enablement
#4 of 6 assessed
Fgfactory Australia
73
Verified

Game and software development agency in Melbourne

Application DevelopmentData Engineering PipelinesMaintenance and Support
#5 of 6 assessed
Marquee Solution
68
Verified

AI-driven software development and digital transformation solutions

Application DevelopmentData Engineering Pipelines

Also in Australia · 41 not ranked here

40 have not yet been assessed on the Agency List Score. Alphabetical.
2 more listed here are not shown on this page.

About this ranking

What this page ranks

This page ranks 5 of the 6 assessed custom software development agencies in Australia — the ones carrying a published score — out of 46 listed.

The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.

Cohorts and awards

Agencies are compared within a cohort — here, Custom Software Development in Australia. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 6, so no award can be issued here.

The 40 custom software development agencies not yet assessed are listed on this page but not ranked.

One more was assessed and no published evidence of its work was found, so no score is shown for it.

Read the full methodology

Paid placement

Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.

Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.

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Questions

How many custom software development agencies are in Australia?
46 are listed on Agency List in Australia. 6 of them have been assessed on the Agency List Score as of September 2026, and 5 of those carry a published score.
Which custom software development agency in Australia is ranked highest?
OptiSol Business Solutions, with an Agency List Score of 78.3, ranks #1 of 6 assessed agencies in Custom Software Development in Australia.
Why are 41 custom software development agencies listed here but not ranked?
40 of the 46 listed have not yet been assessed on the Agency List Score. One more was assessed and no published evidence of its work was found, so no score is shown for it. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
How is the ranking determined?
By Agency List Score, within the Custom Software Development in Australia cohort of 6 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.