Mustard Apps builds SaaS products you can sell.

Have an idea for a web app or mobile app you want to take to market? We’ll design and build the product — you own the code, you control the roadmap, and you keep the profit.

Book a call How it works

Subscription model: development + support included. Built in .NET, hosted securely, and designed for real customers.

Who it’s for

  • Entrepreneurs launching a niche SaaS
  • Agencies / consultants productising a service
  • Business owners turning a proven process into an app
  • Anyone who wants ownership — not vendor lock-in

Building a SaaS is more than “writing an app”.

Most people get stuck because they’re trying to do everything at once: features, payments, onboarding, accounts, support, security, hosting, and then marketing on top.

✓
You need a product that’s simple and focused
The best SaaS solves one clear problem extremely well.
✓
You need it launchable
MVP first — then improve based on real users, not guesses.
✓
You need it maintainable
Clean code, sensible architecture, and support that doesn’t disappear.
✓
You need ownership
So you can grow value and control your future.

How it works

A manageable subscription that covers development and support.

1
Idea → focused scope
We help you narrow the idea to a single clear outcome and define the first release (MVP).
2
Build the first version fast
We create a working product quickly: authentication, core workflow, admin tools, and a clean UI.
3
Launch + iterate
You start selling. We refine based on real user feedback and add features in priority order.
4
Ongoing support included
Hosting guidance, fixes, improvements, and a steady roadmap — without huge one-off invoices.
Important: Unlike the old Mustard Apps fixed-fee approach, this model is designed to be affordable month-to-month, while still delivering a high-quality product you can take to market.

You own the code

This is the key difference. You’re building an asset, not renting a tool. Your subscription covers building and supporting the product — and you own the IP we create for your project.

  • Source code delivered (Git repository)
  • Database schema + migrations
  • Deployment instructions / handover
  • Option to self-host later if you want

Built for selling

We build with your go-to-market in mind — not just features.

  • Clear onboarding and user roles
  • Pricing tiers ready (when you are)
  • Admin tools so you can manage customers
  • Audit trails, exports, and sensible security
  • Mobile-friendly by default (or a dedicated mobile app)

Subscription pricing

Choose a level that matches how quickly you want to build and how much support you need. (We’ll recommend the sensible option — no upselling.)

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Most popular

Launch

From £199 / month
  • MVP build (core workflow)
  • Hosting + support included
  • Weekly progress updates
  • Bug fixes and improvements
Best for: getting to market quickly with a focused feature set.

Growth

From £299 / month
  • Everything in Launch
  • Faster feature delivery
  • Roadmap planning
  • Performance + reliability work
Best for: early traction and scaling the product.

Scale

From £399 / month
  • Everything in Growth
  • Multi-tenant / advanced admin
  • Security hardening
  • More hands-on support
Best for: serious commercial products with bigger user bases.

We’ll set the subscription based on scope, speed and complexity. If you tell me your target price range, I’ll tailor these cards exactly.

Frequently asked questions

Yes — this model is designed so you own the code and can profit from the product. We deliver the repository and support ongoing development as part of your subscription.

Any of the above. We’ll recommend the fastest path to market (often a web app first), then add mobile apps if they genuinely improve adoption.

Yes. When you’re ready, we can add subscription billing and tiered access. We typically start with the product workflow first, then add billing once the value is proven.

That’s normal. We’ll reduce it to a focused MVP that solves one problem well — then iterate based on real customers.

You own the product and the marketing. We can advise on launch readiness (onboarding, pricing tiers, analytics), but the selling and positioning stays with you.

Want to turn an idea into a product you can sell?

Book a call and tell me the idea, who it’s for, and how you plan to sell it. I’ll tell you the quickest sensible MVP and what subscription level it would sit at.

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