admins3

Custom software and SaaS development

From problem to live product. You keep the code.

We scope the smallest useful version, build it in short cycles and launch it. The same way we built RentalsCube, the product our own fleet runs on.

Fixed quote after the call. We reply within 24 hours.

  • 2 live products we built and run
  • RentalsCube live since November 2025
  • Full source code handed over
  • Fixed price before work starts

Sound familiar?

  • The spreadsheet has become the system

    It started as a tracker. Now three people depend on it and nobody trusts the totals.

  • Off-the-shelf tools almost fit

    You're paying for five subscriptions and still doing the glue work by hand.

  • Estimates that grow once work starts

    You want a price you can plan around, and a build you can see while it's happening.

Two products we built and still run

We don't just take briefs. We build our own software and keep it running. These are the two products live today.

RentalsCube screenshot
Live SaaS product

RentalsCube

Fleet rental software for car rental operators. Track vehicles and renters, and collect weekly payments through Stripe.

Built with: React, MySQL, Stripe Connect

Rentals
12
Revenue
$18K
Vehicles
18
Visit live site(opens in a new tab)
SourceRated screenshot
Live media product

SourceRated

A news site that publishes 115+ articles a day, each with an AI credibility score checked against other news sources.

Built with: WordPress, AI Pipeline, Docker

Daily
115+
Verified
94%
Categories
4
Visit live site(opens in a new tab)

Built and run by AdminsCube

Book a 15-minute call

Fixed quote after the call. We reply within 24 hours.

What you get

A production product, not a prototype

  • Full-stack web application

    A React front end and Node.js API, with responsive, mobile-first design.

  • Accounts, roles and admin

    User authentication, role-based access and an admin dashboard with usage analytics.

  • Stripe payments

    Subscriptions or one-off payments, set up the way RentalsCube collects weekly rent.

  • Transactional email

    Reminders, receipts and notifications sent from your product.

  • Hosted deployment

    Your product goes live on hosting with a CI/CD pipeline, so updates ship without drama.

  • Source code and handover

    Documentation, the full source code and a proper handover, so you're never locked in.

Compared with off-the-shelf software

CriterionBuilt with usOff-the-shelf SaaS
Fits your processYes, built around how you workYou adapt to theirs
Who owns itYou, with the full source codeThe vendor
PriceFixed, agreed before work startsA subscription that grows with your team
ChangesShort cycles, you see working software as we goRequests join their roadmap
PaymentsStripe, set up the way RentalsCube collects rentDepends on the tool

How it works

  1. Scope

    You describe the problem. We define the MVP and send a fixed price before any work starts.

  2. Build

    We build in short cycles and show you working software along the way.

  3. Launch and iterate

    We launch to real users, then improve the product based on how they actually use it, not on guesses.

How pricing works

After a 15-minute call we scope the MVP and send a fixed price before any work starts. No price list, because the scope is yours.

  • Fixed price before any work starts
  • Full source code, documentation and a proper handover
  • Working software shown along the way, not a big reveal
  • Honest advice if extending your existing code is the better option
Book a 15-minute call

Fixed quote after the call. We reply within 24 hours.

Straight answers before you book

How much does a typical MVP cost?

It depends on scope, so we don't quote from a price list. After a 15-minute call we scope what you need and send a fixed price before any work starts.

How long will it take?

It depends on what the MVP includes, and we'll give you a date on the call once we've scoped it.

Do I own the code?

You get the full source code, along with documentation and a proper handover, so you're never locked in.

Do you maintain the app after launch?

Yes. We offer ongoing retainers for maintenance, new features and scaling.

Can you extend my existing product?

If it's built on React or Node.js, including Next.js, yes. We'll review the codebase and tell you honestly whether extending it or rebuilding makes more sense.

What do you build with?

Usually a React front end, a Node.js API and Stripe for payments. RentalsCube, for example, uses React (Vite), Express with tRPC, MySQL and Stripe Connect.

Got a problem software could solve?

Book a 15-minute call. We'll scope the MVP and send a fixed price before any work starts.

Project type

Fixed quote after the call. We reply within 24 hours. By sending this you agree we can contact you about your enquiry — see our Privacy Policy.

What happens next

  1. We reply within 24 hours to set a time
  2. A 15-minute call about the problem and who'd use the product
  3. A scoped MVP and a fixed price

Prefer email? contact@adminscube.com