Custom business software, built onshore

Custom software for your business,
priced for the AI era.

We build custom software to help run your business. Replace the legacy applications, off-the-shelf products, spreadsheets, and recurring licences your business has outgrown. Built to fit how you actually work, where everything talks to everything else, and owned outright with no per-seat fees.

What it handles
CRM Quoting & invoicing Xero integration Scheduling & jobs Inventory Reporting Client portals

See what one system could replace

Tell us what you're running on now. We'll map out what a custom system would look like.

No obligation. We'll respond within 24 hours.

"The speed and quality of delivery was genuinely impressive. I can't recommend Launch Assembly highly enough."

Max Gorvel · Founder, Wellplay

"Well done team, you've done a great job in a very tight timeframe."

Alaa Armanyous · Chemist Link

The problem

You've outgrown the software holding the business together.

Every business we talk to has hit the same wall. The system that got you here doesn't fit how you work now, and the cost of that gap shows up everywhere: hours lost to manual re-entry, licence fees climbing every quarter, and one person who's the only one who understands how it all hangs together.

The legacy database

A database one person understands. Access or FileMaker, built years ago. It does most of what you need, breaks in ways only they can fix, and becomes a real liability the day they leave.

The subscription patchwork

Salesforce, a separate quoting tool, three spreadsheets. Per-seat fees climb every time you hire, nothing quite matches how you work, and your team re-keys the same data between them.

The big all-in-one platform

Odoo, NetSuite, SAP. You bend the business to fit the software, wait months to go live, and pay for the 80% you'll never touch.

Spreadsheets holding it together

The real operating system of the business. Fragile, no audit trail, no permissions, and the wheels start coming off as you grow.

What changed

Building custom got cheap enough to make sense for a business your size.

For years, software built around your business only paid off at enterprise scale, so everyone smaller rented whatever was on the shelf. Modern AI coding tools changed what one senior engineer ships in a week, which brought the cost of building custom down by an order of magnitude. That's the whole reason this is now possible for a business your size. A system built exactly for you now costs less than the legacy software and stacked-up licences you'd be replacing, so you can finally move off them and own what you run on.

10×

What a senior engineer now ships in a week, paired with modern AI coding tools. That's the drop in build cost we pass on to you.

$0

In per-seat licence fees on a system you own outright, however much you grow.

Keep renting

Licences that climb forever

Per-seat fees across every tool in the stack, going up each time you hire. Paid every month, with no end date. And it still doesn't fit how you actually work.

Own it once

One system, built and yours

One custom system, built to fit, paid for once and yours to keep. Often less than a year or two of the licences it replaces. After that, it's just yours.

The new way

One custom system, built around how you already work.

We build the actual software your business runs on, properly engineered, on a live URL you can watch take shape. CRM, quoting, invoicing, scheduling, reporting, whatever your operation needs, in one place that fits exactly how your team works. Senior onshore engineers make the architecture calls. You get a fixed scope, a fixed price, and a system you own outright.

How we build it

What you get, and why it holds up.

A short list of principles we run every project against. If we can't tick all of these, the project isn't worth taking on.

01

One system, built to fit

Real architecture and data modelling so the software matches how you actually operate, instead of forcing your team into someone else's workflow. Built by people who've shipped production software for years.

02

Yours to keep, no per-seat fees

You own the code outright, deployable anywhere, no lock-in and no licence that climbs every time you hire. Add as many people as you like without paying more for the privilege.

03

Wired into Xero and what you keep

Invoicing and payments flow straight to Xero. We integrate the tools you want to keep, retire the ones you don't, and confirm exactly what connects before we start.

04

Built onshore, fixed price

Same hours, same language, same legal jurisdiction. Priced against the scope, not the clock, so you know the number before you sign and it doesn't drift by the hour.

05

Your data, migrated across

We bring your records over from the old database or the spreadsheets, and run the new system alongside the old one until you're confident. The business never skips a beat.

06

Maintained, not abandoned

Bug fixes after launch are included for a meaningful window. Optional support after that, priced reasonably. Same team when you're ready for the next module.

One place for all of it

The parts of the business, finally in one system.

We build only the parts you need, designed to work together. No double entry, no copy-paste between tools, one source of truth your whole team works from.

CRM & contacts

Leads, customers, and the full history of every relationship in one place.

Quoting & proposals

Build and send quotes, track what's accepted, turn them into jobs in a click.

Invoicing & Xero

Raise invoices that flow straight into Xero. No re-keying, no reconciliation by hand.

Jobs & scheduling

Plan work, assign your team, track progress from quote to completion.

Inventory & stock

Know what you have, what's on order, and what's running low, in real time.

Reporting & dashboards

The numbers that actually run your business, on a screen, not in a spreadsheet.

Customer portal

Give your clients a login to see their jobs, invoices, and documents.

Approvals & workflows

Encode how work actually moves through your business, with the right sign-offs.

It connects to what you already use: Xero for accounting, Stripe for payments, your email, your existing APIs. The tools that earn their place stay. The rest get retired.

Who this is for

Built for established businesses that have outgrown their software.

You're 20 to 100 people and growing

Big enough that the software friction costs real money every week, small enough that a heavyweight enterprise platform is overkill and overpriced.

You're running on a database or a patchwork

An old Access or FileMaker system, or a stack of subscriptions and spreadsheets that don't talk to each other and never quite fit.

You keep paying for seats and still do workarounds

The licence fees climb every time you hire, and your team still bridges the gaps by hand because the tools don't match how you work.

You want it to fit, and you want to own it

One system built around your operations, integrated with Xero and the tools you keep, that you own outright with no lock-in.

We also build customer-facing products, internal tools, and AI features wired into existing operations (that last one lives on our AI page).

The process

From kickoff to switch-over, without the risk.

  1. 01

    Discovery

    A real conversation about how your business actually runs, what you're using now, and where it's costing you. No pressure to commit. We'll tell you if we're not the right fit.

  2. 02

    Proposal

    A detailed scope with a fixed price, including exactly which systems it replaces and how your data comes across. You see the number before you sign anything. Deposit kicks the project off.

  3. 03

    Build & deploy

    We build in the open, on a live URL, with your own data in it. You're clicking real software as it takes shape, not reviewing a wireframe and waiting.

  4. 04

    Migrate & run in parallel

    We bring your records over and run the new system alongside the old one, so the business never skips a beat. You switch over when you're confident, not before.

  5. 05

    Launch & handover

    Final cutover, documentation, credentials, walkthrough with your team. Bug fixes covered for a meaningful window. Optional support if you want ongoing work.

After launch

It's live. We don't vanish.

Most agencies disappear at handover, or charge a fortune to come back. We don't run it that way.

Bug fixes included

If something we built breaks, we fix it. Part of every project, not a separate line item.

Support, priced honestly

Ongoing improvements, monitoring, small changes. Reasonable monthly rate, cancellable any time.

New modules when you need them

Most clients come back to add the next part of the operation. Same team, same system, no starting over.

Simon Thompson
A note from the founder

Hey, I'm Simon.

I've spent years building, launching, and scaling software. My own products, plus other people's. Coaching founders at accelerators, shipping tools used by thousands.

The best software is built around how you actually work, not the other way around. Too many businesses lose hours every week to manual processes, or pay for a stack of subscriptions that still doesn't quite fit.

I started Launch Assembly because the tools changed and most of the industry hasn't repriced. A senior engineer with modern AI tooling builds in weeks what used to take a quarter, so a business your size can finally have software made exactly for it. We build the system your business runs on. Onshore, fixed scope, yours to keep.

Common questions.

One consolidated system for how your business runs: CRM, quoting, invoicing, scheduling, inventory, reporting, whatever your operation needs. Custom-built around your workflow, integrated with Xero and the tools you keep. We build only the parts you need, designed to work together.
Yes. That's most of what we do. We map what you're using now, rebuild the parts that matter as one system, migrate your data across, and retire the subscriptions you no longer need.
Yes. Invoicing and payments flow straight into Xero, so there's no re-keying or manual reconciliation. We also integrate Stripe, email, and most tools with an API. We confirm exactly what connects in the proposal.
You pay once to build it and you own the code outright, with no per-seat licence that climbs every time you hire. For a business your size, a custom system often costs less than a year or two of the licences it replaces, and there's no recurring fee after that beyond optional support.
Most first versions are live in weeks, not months. We build in the open on a live URL so you see it taking shape the whole way, with your own data in it.
Built into the project. We bring your records across from the old database or spreadsheets and run the new system alongside the old one until you're confident, so nothing falls through the cracks during the switch.
It's your code, built to be extended. Small changes get absorbed inside scope. Bigger additions become a new module, same team, same system, no starting over. The whole point is that it bends to how you work, not the other way around.
Yes, via Hotwire Native. Your team can use the system on the floor, on the road, or on-site, with real native iOS and Android apps built from the same codebase, including push, camera, and GPS.
Ruby on Rails, Hotwire, Tailwind, PostgreSQL, deployed on Fly.io, integrated with Xero, Stripe, and the Anthropic API for AI features. A battle-tested stack we know inside out, which is part of how we move fast.
We iterate until you are. If we genuinely can't deliver what was scoped, we make it right. The project is fixed-price and structured so we both have skin in the outcome, not the hours.
Start a project

Tell us what you'rerunning on now.

A short message is enough. We'll reply within a working day to set up a call.

See what one system could replace

Tell us what you're running on now. We'll map out what a custom system would look like.

No obligation. We'll respond within 24 hours.