The SaaS MVP tech stack, for founders who do not code

Pick a boring, popular stack and spend your judgement on scope instead. For most UK SaaS MVPs that means Next.js, Postgres, a hosted auth provider and Stripe — under $50 a month in tooling before you have customers. Three decisions are genuinely hard to reverse; the rest you can change later.

Does the tech stack actually matter?

Less than most founders fear, and more than most agencies admit.

Less than you fear, because almost any mainstream stack will carry a first version to its first hundred customers. Nobody ever churned over the choice of framework.

More than agencies admit, because a stack is a hiring decision. If your build partner picks something clever and rare, you have quietly made yourself dependent on them, and they know it.

The test is not "what is best?" but "could a competent developer we have never met read this in a week?"

What does a sensible 2026 SaaS MVP stack look like?

Our own default, not an industry standard; we would deviate for a good reason.

Layer	What we would pick	Why
Application	Next.js, TypeScript	The largest hiring pool in the React world
Database	Postgres	Boring, relational, thirty years of answers already written down
Authentication	A hosted provider	Sign-up, resets and sessions are a solved problem
Payments	Stripe	Subscriptions, invoices, tax and failed payments in one place
Email	A transactional email service	Resets and receipts have to arrive
Analytics	One product-analytics tool	To see what users actually do
Errors	One error tracker	To find the bug before the customer emails

The more useful half of that table is the one we did not write: what to skip. For a first version, skip microservices, a separate mobile app, Kubernetes, message queues, GraphQL, a custom design system, and building your own authentication. Each is a real tool with real uses, and none of those uses is "we have no customers yet".

The framework row is argued at length in why Next.js suits business websites.

What does it cost to run before you have customers?

Vendor list prices as of September 2026, from their own pricing pages. Subscriptions are in US dollars because that is how they are listed; you pay the sterling equivalent plus VAT.

Tool	Free tier	Paid entry price
Vercel	Hobby, $0	Pro, $20/month per developer seat
Supabase	500 MB database, 2 projects	Pro, $25/month
Clerk	50,000 monthly retained users	Pro, $25/month, then $0.02 per user above 50,000
Stripe	No monthly fee	1.5% + 20p standard UK card; 2.5% + 20p EEA; 3.15% + 20p international
Stripe Billing	—	0.7% of billing volume

Two things founders routinely miss. Stripe Billing is charged on top of the card fee, not instead of it. A £50-a-month subscription on a standard UK card costs roughly 1.5% + 20p for the payment and another 0.7% for the subscription machinery — a real chunk of gross margin on low-priced plans, worth knowing before you set your price.

And free tiers are for building, not demoing. Supabase pauses free projects after a week of inactivity — entirely reasonable of them, and entirely fatal if an investor opens your link on a quiet Tuesday.

Set against a build budget the tooling is noise: our guide to app development costs has the numbers that actually move.

Which three decisions are hard to reverse?

Most of the stack is swappable — hosting in an afternoon, your error tracker over lunch. Three things are not.

Your data model. Not the database product, but the shape of the tables. If you model a single-user tool and later need teams and permissions, that is not a feature, it is surgery.

Your identity provider. Passwords and sessions live with whoever handles sign-in. Migrating them later usually means asking every customer to reset their password — the worst email you can send a young product.

Your billing history. Stripe holds your subscriptions, invoices and card tokens. Moving that is a project in itself, so pick a provider you intend to keep.

Everything else, treat as rented.

Should you use no-code instead?

Often, yes, for the step before this one. If the question is "does anyone want this?", a no-code tool, a spreadsheet, or a form with a person behind it answers it faster than any build. We make the same argument in our MVP scoping guide: doing things manually behind the scenes is the most effective cost control there is, and it teaches you what to automate.

Move to code when you hit a wall the tool cannot clear, when per-record pricing outruns a build, or when you need to own the data model.

Why does your hosting region matter more in the UK?

This is the one genuinely UK-specific item here, and the one most stack guides skip, being written for a US audience.

Cloud platforms default to US regions. Vercel's documentation states that the default function region for all new projects is Washington, D.C. (iad1), reasoning that most external data sources sit on the US East Coast (Vercel docs, page updated 11 August 2026). London (lhr1) is available; you simply have to choose it. Supabase likewise offers a London region, eu-west-2, set when the project is created (Supabase docs).

Click through the defaults and your application server ends up in Virginia, your database somewhere else again, and every page load pays for the round trip — the most common self-inflicted performance problem we find in inherited codebases, created in a project's first ten minutes.

Then the law. Personal data leaving the UK is a restricted transfer under UK GDPR, needing a lawful route: adequacy, or safeguards such as the IDTA or UK Addendum with a transfer risk assessment (ICO). Not a prohibition — the major vendors have the paperwork — but a decision with obligations attached, so make it on purpose. This is general information, not legal advice.

Frequently asked questions

Does the tech stack matter for an MVP?

Less than most founders fear, and more than most agencies admit. Any mainstream stack will carry a first version a long way. What matters is that it is common enough to hire against, and that database, identity and payments are chosen deliberately.

What is a sensible SaaS MVP stack in 2026?

Next.js and TypeScript for the application, Postgres for the database, a hosted authentication provider, Stripe for payments and subscriptions, one product-analytics tool and one error tracker. All mainstream, all hireable against. That is the point of it.

How much does a SaaS MVP stack cost to run before I have customers?

Under $50 a month in list-price subscriptions is realistic as of September 2026: Vercel Pro at $20 a month per developer seat and Supabase Pro at $25 a month. Stripe takes 1.5% + 20p on a standard UK card, and Stripe Billing adds 0.7% of billing volume on top.

Should I use no-code instead?

For testing whether anyone wants the thing, yes: a no-code tool or a manual process behind a form answers that faster and cheaper than any build. Move to code when you hit a wall the tool cannot get over, or when you need to own the data model.

Why does my hosting region matter if I am selling to UK customers?

Latency, because an application server an ocean away from its database is the most common self-inflicted performance problem we see. And law, because personal data leaving the UK is a restricted transfer under UK GDPR and needs a lawful route.

Where this leaves you

You do not need to adjudicate framework arguments. You need four answers from whoever builds for you: could someone else take this over, what does the data model assume about teams and permissions, where does it run, and what does it cost a month before we have a customer?

We build this way ourselves: how we build a SaaS MVP in six weeks describes the engagement, and the service is our SaaS and MVP product builds, part of our app development work.

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Easy Insight is a UK consultancy for AI, web, apps and data — senior specialists only, no juniors.