Custom development · Use case
Replacing SaaS Spaghetti With One Custom Platform
When your business is held together by ten SaaS tools and the integrations between them, the right move is often a single custom platform that does the actual job.
The problem
What we usually see when a saas → custom platform reaches out.
A common pattern at $2M–$50M revenue: the operation runs on ten SaaS tools held together by Zapier flows and tribal knowledge. Per-user fees scale with growth. Each tool was the right answer to a problem at one point but none of them quite fit the operation now. Reporting requires copying data between systems. Onboarding a new team member takes days because the workflow lives across so many surfaces. The sum of subscriptions + integration overhead + lost time often quietly exceeds what a custom platform would cost.
The landscape
Where the gap lives.
Most $2M-$50M businesses in Australia run on a SaaS-first stack that started small and accreted. CRM, project management, file storage, communication, accounting, billing, marketing automation, support, custom workflows in Airtable or Notion or Google Sheets. Each tool was added to solve a specific problem; none were ever rationalised. The total monthly subscription cost is often $3-15K, the integration overhead (mostly people-time) is another full-time-equivalent, and the operational drag from system fragmentation rarely gets measured because no one owns the cross-system view.
The build-vs-buy decision isn't universal. Some SaaS tools are excellent at what they do and would be foolish to rebuild — accounting (Xero/MYOB), payroll, payment processing, regulated functions. Others are providing 20% of their feature set at 100% of their cost — those are candidates for replacement. The pattern that consistently pays back: replace 3-7 tools with one custom platform that fits the operation's actual workflow, while keeping accounting and payroll as integrated SaaS. Per-user fees stop scaling, integration overhead drops, reporting becomes possible, and the team stops being the integration layer.
We have a more detailed build-vs-buy framework if you want to think through the decision before talking to anyone. The honest answer is sometimes "stay with SaaS" — and we'll say so before quoting.
Our approach
How we think about it.
Honest discovery first. Sometimes the answer is "stick with the SaaS, it's working" — and we'll tell you so. When the answer is custom, we map the actual workflow rather than the org chart, then build incrementally so value lands before the project finishes. The custom platform respects the parts of the SaaS stack that genuinely work (accounting, payroll, regulated functions) and replaces the parts that no longer fit.
Why bespoke
Where off-the-shelf falls short.
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Per-user pricing on premium SaaS tiers (HubSpot Enterprise, Salesforce Sales Cloud, Notion Plus) becomes punitive past 30-50 staff
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Integration overhead between 8-10 systems costs more in people-time than the subscriptions themselves
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Reporting across systems is impossible without a data warehouse — adding another layer to the stack
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Workflow-specific bespoke logic doesn't fit any individual SaaS, so it ends up in a fragile Zapier chain
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Onboarding new team members takes days because the workflow is spread across multiple tools and tribal knowledge
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Custom platforms can be designed around the actual workflow rather than forced into the SaaS's assumptions
What we typically build
Concrete examples.
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Custom operational platform replacing 5–10 SaaS tools held together by Zapier
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Bespoke order management replacing spreadsheets + email + multiple SaaS
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Internal tooling replacing brittle Airtable / Notion / Google Sheets workflows
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Custom CRM when the off-the-shelf options don't fit the actual sales motion
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Multi-tenant platform when you're building a product, not just running one
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Reporting layer that pulls cleanly from systems instead of copy-paste
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Phased migration so the team isn't paralysed during the transition
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Data warehouse + business intelligence layer for cross-system reporting
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Workflow automation engine for bespoke business logic that doesn't fit a SaaS
Common integrations
Platforms we typically connect.
Platforms we typically integrate with for this kind of work. The list isn't exhaustive — if it has an API or webhook, we can connect to it.
Airtable
Often the SaaS being replaced — fine for small teams, expensive at scale
Integration page →
Notion
Knowledge base + lightweight workflow that hits limits past 50 staff
Integration page →
ClickUp
Project management with workflow features that don't scale to bespoke logic
Integration page →
Asana
Project management often replaced by custom platforms with workflow-specific features
Integration page →
Slack
Communication layer that stays — usually integrated, not replaced
Integration page →
Microsoft 365
Office stack that stays — but often loses Teams/SharePoint when custom platforms ship
Integration page →
Google Workspace
Alternative office stack — same pattern
Integration page →
Xero
Almost always stays — accounting belongs in dedicated software
Integration page →
MYOB
Alternative accounting — same pattern, stays integrated
Integration page →
HubSpot
CRM that often partially stays — marketing layer kept, sales/ops moved to custom
Integration page →
Salesforce
Enterprise CRM that usually stays but with bespoke layers built around it
Integration page →
Stripe
Payment processing that stays — integrated, not rebuilt
Integration page →
Zapier
The Zapier flows usually go away — replaced by bespoke integration logic
Integration page →
Make
Same as Zapier — orchestration moves to custom code with proper observability
Integration page →
n8n
Sometimes self-hosted n8n is kept for lightweight workflows alongside the custom platform
Integration page →
Don't see what you use? See the full integrations catalogue or tell us what you run — if it has an API, we connect to it.
Services involved
What this draws on.
Custom Web Apps
Custom-built web applications when off-the-shelf SaaS forces you to compromise.
Typical projects $20K–$120K
API Integrations
Wire your business systems together so data flows automatically — no more copy-paste.
Typical projects $8K–$45K
Web Development
Performance-first websites and ecommerce — across modern frameworks, WordPress, and WooCommerce.
Typical projects $10K–$60K
Indicative pricing
Most replacement-platform engagements fall between $40K and $150K. Phased delivery means real value lands at $30K-$50K milestones rather than waiting for the full build.
Real pricing is set after a scoping call. We give honest ranges up front rather than hiding behind "contact us" — the actual quote may land lower or higher depending on what discovery surfaces.
Proof
Related case studies.
Built end-to-end
Custom
Property & Asset Management
Pripark
A custom platform for an established Australian property and asset management business.
Manufacturing platform
Bespoke
Luxury Manufacturing
Sacco Carpet
A bespoke digital platform for one of London’s most exclusive carpet manufacturers.
Integrates with major DAMs
Multi-DAM
Public Asset Presentation
Memat
A public-facing presentation layer that exposes assets from major DAM systems to audiences.
FAQs
The questions we usually get.
How do we know whether to build vs. keep the SaaS stack?
Compare the all-in cost (subscriptions, integrations, tribal knowledge, time tax) over 3 years vs. the build cost. We have a more detailed build-vs-buy framework that walks through it. The honest answer is sometimes "stay with SaaS" — and we'll say so.
How do we avoid the failure mode where the custom platform takes 2 years and never ships?
Phased delivery. The first phase usually ships in 8–12 weeks and replaces a specific high-cost SaaS tool. Subsequent phases each ship in 6–10 weeks. The operation never enters a "we're mid-rebuild and nothing works" state.
Do we lose flexibility compared to swappable SaaS?
You lose the *theoretical* flexibility of swapping the off-the-shelf SaaS. You gain real flexibility in extending the platform to fit how your business actually evolves. Most teams find the trade favourable once they can change the software to match the workflow rather than the workflow to match the software.
What about the long-term maintenance?
Most engagements include a maintenance retainer for ongoing engineering, monitoring, and feature work. The operation isn't left holding the codebase alone — though the codebase is yours and you can take it elsewhere if needed.
How long until the first SaaS tool gets replaced?
Typically 8–12 weeks for the first phase. Replacement platforms are not month-long projects — but they are designed so the first usable slice lands well before the full build completes.
Written and delivered by
Andrew Roper — Founder & Technical Director
22+ years of practice across SaaS, ecommerce, healthcare information systems, manufacturing platforms, and government-adjacent compliance software. Every engagement is led personally — not handed off.
Let’s build something
The right system,
built once, properly.
If your business is ready to scale beyond what off-the-shelf tools can support — we should talk.