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Custom Software & SaaS

Custom software and SaaS, built to last

Bespoke software and multi-tenant SaaS products, the internal tools, platforms and subscription apps off-the-shelf cannot do, engineered to scale, integrate and stay cheap to maintain, with the code in your name.

Custom software and SaaS, built to last

Off-the-shelf tools take you far, until the day your workflow, your data model or your pricing stops fitting someone else's product. That is when custom software earns its cost: a system built around how your business actually works, not the other way round. For SaaS founders, it is the whole company, so the foundations have to be right.

The trap is that software is easy to start and expensive to get wrong. Multi-tenancy, authentication, billing, data isolation and integrations are the unglamorous foundations that decide whether a product scales or collapses under its first real customers. We build those properly, first.

Our take: the build is the cheap part; running, maintaining and scaling is where the real cost lives. We engineer for the long game, clean architecture and lean maintenance, so your software is an asset that compounds, not a liability that grows.
What's included

Custom Software & SaaS, end to end

Custom web applications

Dashboards, portals, admin panels and internal tools built around your exact workflow, not a template.

Multi-tenant SaaS

Subscription products with proper tenant isolation, roles and permissions engineered in from the start.

Billing & subscriptions

Plans, trials, upgrades, proration and reconciliation wired correctly, because money bugs destroy trust.

Integrations & APIs

Clean APIs and reliable integrations with the tools your customers and team already use.

Data & reporting

A sound data model and the reporting that turns your software into decisions, not just records.

Security & compliance

Authentication, authorization, rate limiting and the data and legal controls your market requires.

Next.js / ReactNode.jsPostgreSQLStripeAWSREST / GraphQL
How we work

How we build software that scales

1

Frame

The real workflow, the data model and the must-have foundations, scoped into a fixed, milestone-based plan.

2

Design

Architecture and interface designed together, so the system is usable and built to grow.

3

Build

Senior engineering in visible weekly cycles: multi-tenancy, billing, integrations and tests done right.

4

Ship & scale

Deployed under your accounts with monitoring, then hardened and extended as real usage grows.

What to watch for

Where these projects quietly go wrong

The mistakes we have seen cost founders the most, so you can avoid them.

Deferring the foundations

Multi-tenancy, auth, billing and data isolation get ruinously expensive to retrofit. Skipping them to demo faster is the classic SaaS mistake; we build them first.

The cheap quote

A cheap build hides missing features, slow performance and mismanaged data behind a nice screen. It surfaces later as churn and a costly rebuild. Better built right than built twice.

Untested integrations

Integrations that look connected but were never exercised end to end break at launch. We run mock transactions through the whole flow before you go live.

Optimising for the build, not the run

Cheapest to build often means most expensive to maintain. We engineer for low long-term cost, because launch is one percent of the journey.

Why appico

Made by the team founders re-hire

Foundations, multi-tenancy, auth, billing, built first
Engineered to scale and cheap to maintain long term
AI-amplified delivery, senior humans on architecture
Integrations tested end to end before launch
Full source code, data and accounts owned by you
Built by the team behind cGen, an AI-native platform
Common questions

Custom Software & SaaS, asked and answered

What counts as custom software?

Anything built specifically for your business rather than bought off the shelf: internal tools, dashboards, portals, platforms and multi-tenant SaaS products. If your workflow, data model or pricing no longer fits an existing tool, custom software is usually the answer.

How much does custom software or a SaaS product cost?

It depends on scope and how much foundational work (multi-tenancy, billing, integrations) is involved. We price fixed scope by milestone, and we usually start with the core so you invest in proven ground first. Built with a senior offshore team, the same product costs far less than at US or UK rates.

Can you build a multi-tenant SaaS from scratch?

Yes, and we build the parts that decide whether it scales, tenant isolation, roles and permissions, billing and data separation, in from the start rather than bolting them on later, which is far more expensive.

How do you handle billing and subscriptions?

We wire plans, trials, upgrades, proration and reconciliation properly, usually through a provider like Stripe, and test the money flows end to end. Reconciliation and refunds are defined precisely, because billing bugs are the fastest way to lose a customer.

Will my software integrate with the tools we already use?

Yes. We build clean APIs and reliable integrations, and, crucially, we test them with mock data through the whole flow before launch, so the fields sync in the right format and nothing breaks in front of real users.

Is custom software secure?

We build security in by default: real authentication and authorization, rate limiting, validated input, and the country-specific data and legal controls your market needs. For regulated work we scope compliance explicitly before building.

What about maintenance after launch?

The build is one percent of the journey. We engineer for low long-term maintenance cost, and offer ongoing support and dedicated-team arrangements so your software keeps evolving. Because we built it, changes are fast.

Do I own the software and its data?

Always. Source code, infrastructure, data and accounts are in your name from day one, with IP assignment in the contract. Your software is your asset.

Explore more

Everything under one roof

Free quote

Tell us what you're building.

Send the brief and we come back within 24 hours, with questions and an honest scope, not a canned pitch.

First consultation is freeYou own the code and accounts from day oneFixed scope, milestone-based pricing
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