The Best Tech Stack for a SaaS MVP in 2026

The fastest way to delay your SaaS launch is to spend three weeks choosing the perfect tech stack instead of shipping. Most founders we work with arrive with a list of clever options — Rust, GraphQL federations, microservices — and leave with the boring stack that actually shipped their MVP in six weeks. Here's what we'd build with in 2026, and why "boring" is the feature.

What's the best tech stack for a SaaS MVP in 2026?

For most SaaS MVPs in 2026, the right stack is **Next.js + TypeScript + Postgres

• Stripe + Resend, hosted on Vercel**. It's boring, proven, well-documented, and any developer you hire later can pick it up in a day. Deviate from this default only when you have a specific, concrete reason — not for taste.

The reason most stack debates waste time: customers don't care what you build with. They care whether the product solves their problem. Picking a familiar, deeply-supported stack means more of your time goes into the part they do care about.

The default stack, layer by layer

Frontend: Next.js + TypeScript

Next.js is the right default because most SaaS products have public marketing pages (which need SEO and fast load times) and an authenticated app section (which needs interactivity). Next.js handles both in one codebase without forcing you to bolt on SSR or routing libraries.

TypeScript is non-negotiable on anything serious. The 30-minute cost of adding types pays back the first time the compiler catches a bug that would otherwise have hit production.

We covered the React-vs-Next.js decision in detail in a separate piece — the short version: pick Next.js unless your product is entirely behind a login.

Backend: API routes first, separate service later

For an MVP, Next.js API routes (or Route Handlers if you use the App Router) are enough. You get a backend in the same repository, the same deploy, with shared types. No second service to maintain, no separate hosting bill.

Move to a separate Node service (Express, Fastify, NestJS) only when one of these is genuinely true:

• You have long-running jobs (>30s) that don't fit Vercel's function timeouts
• You need WebSockets at scale
• A non-web client (mobile app, integration partner) needs the same API

If none of those apply, stay on API routes. We've shipped six-figure ARR SaaS products that never needed a separate backend.

Database: Postgres

Postgres is the right default for almost every SaaS MVP. It handles relational data (users, organisations, projects), it scales to millions of rows without ceremony, and it has the richest ecosystem of any open-source database.

Recommended Postgres hosts in 2026:

| Host | Best for | |---|---| | Supabase | Built-in auth + storage + realtime; great for "Firebase but Postgres" | | Neon | Serverless Postgres, pay-per-use, great for low-traffic MVPs | | Railway | Simple deploy of Postgres + other services, predictable pricing | | Vercel Postgres | Lives next to your Vercel app, simplest integration |

Skip MongoDB unless your data is genuinely document-shaped (rare for SaaS). Skip SQLite for anything with concurrent writes. Skip Firestore if you ever want to leave Firebase.

Auth: Clerk, Supabase Auth, or NextAuth

Pick one — don't roll your own. Authentication is the single area where "build it yourself" most often produces a security incident.

| Option | When it fits | |---|---| | Clerk | Best UX out of the box, paid from $25/mo, fastest to ship | | Supabase Auth | Free, tightly integrated with Supabase Postgres, less polished UI | | NextAuth (Auth.js) | Free, BYO database, most flexible, more setup | | Lucia | If you want to own the implementation but not the security primitives |

For an MVP that needs to ship in 8 weeks, Clerk or Supabase Auth. NextAuth if your design system requires you to control the sign-in screens visually.

Payments: Stripe

There is no second-best payments option in 2026. Stripe Checkout (hosted) for the simplest path, Stripe Elements when you need the form embedded in your own UI. Use Stripe's billing portal for self-serve subscription management — don't build that screen yourself.

Skip Paddle, Lemon Squeezy, Polar etc. for an MVP unless you specifically need merchant-of-record (they handle global VAT/sales tax for you). For a UK-only or UK+EU launch with a registered company, Stripe direct is simpler.

Transactional email: Resend

For sending email (contact form notifications, welcome emails, password resets, receipts), Resend is the modern default. Generous free tier (3,000 emails/month), great API, easy domain verification, excellent deliverability.

Alternatives: Postmark (slightly better deliverability, costs more), SendGrid (the legacy choice, more complex than it needs to be).

Avoid raw SMTP unless you specifically need to relay through your own mail server.

Hosting: Vercel for the web app

Vercel is the right default because Next.js is a Vercel product — the integration is seamless. Free tier covers most pre-revenue MVPs.

Alternatives worth knowing:

• Cloudflare Pages + Workers — cheaper at scale, more setup
• Railway / Render — better if you have non-Next services running too
• Fly.io — if you need global edge servers for non-HTTP workloads
• Your own VPS — only if you have specific compliance needs

AI: OpenAI or Anthropic via API

If your MVP needs AI features (LLM, summarisation, classification, search), call OpenAI or Anthropic via their API. Don't self-host a model for an MVP — the cost-per-call from an API is lower than the infrastructure cost of running your own until you're well into product-market-fit territory.

We cover the "should I add AI?" question in a dedicated piece — short answer: only when AI solves a problem your customers actually have.

Analytics: PostHog or Plausible + Vercel Analytics

For product analytics (who's using which feature), PostHog. For privacy-first web analytics (page views, conversions), Plausible or Vercel Analytics.

Skip Google Analytics 4 for the product side — it's optimised for marketers, not product teams.

What to avoid in an MVP stack

| Tempting choice | Why to skip for an MVP | |---|---| | Microservices | Operational complexity you don't need below 10k users | | Kubernetes | Same; deploy with Vercel/Railway and revisit at scale | | GraphQL | REST + tRPC is faster to ship for a single-client app | | Custom auth | Reinventing security is how you get on haveibeenpwned | | MongoDB | Postgres handles documents fine via jsonb; rarely worth the trade-off | | Exotic frontend framework | Solid, Qwik, etc. are interesting but hire pool is small | | Self-hosted everything | You're optimising for cost when you should optimise for time |

A complete example stack

For a typical UK SaaS MVP — say a B2B tool with auth, organisations, billing, and an email-based workflow — here's what we'd actually use:

Frontend:    Next.js 15 + TypeScript + Tailwind
Backend:     Next.js API routes (App Router or Pages Router)
Database:    Postgres on Supabase
Auth:        Clerk
Payments:    Stripe Checkout + Stripe Billing Portal
Email:       Resend (transactional) + Loops (marketing, optional)
File upload: Uploadthing or S3-compatible (Supabase Storage / R2)
Search:      Postgres full-text → upgrade to Meilisearch if needed
AI:          OpenAI or Anthropic via API (when needed)
Hosting:     Vercel
Analytics:   PostHog (product) + Vercel Analytics (web)
Monitoring:  Sentry

That's ~10 services, all with generous free tiers, all with proven integrations to each other, all with strong documentation. It'll get you from zero to first paying customer without architectural rewrites.

When to deviate

There are legitimate reasons to leave this stack. Specifically:

• You're building infrastructure software (databases, dev tools) — your audience expects technical sophistication; boring is bad signal.
• You have hard compliance requirements (financial services, healthcare) — your hosting and database choices may be dictated by regulators.
• You have a non-trivial real-time requirement (collaboration, trading) — the default stack works fine for most apps but not always for these.
• You already have deep team expertise elsewhere — if your CTO has shipped five Django products, Django + Next.js is a defensible choice.

If none of those apply, the boring stack is the right stack.

The bottom line

For a SaaS MVP in 2026: Next.js + TypeScript + Postgres + Stripe + Resend on Vercel. Add Clerk for auth, PostHog for analytics, OpenAI/Anthropic for AI features when relevant. Skip microservices, custom auth, MongoDB, GraphQL, and exotic frameworks unless you have a concrete reason.

The stack is a means to an end. Pick the one that gets you to customers fastest with the fewest sharp edges, then build something they actually want.

Want a specific stack spec for your idea? Book a free scoping call and we'll map the right tools to your product — including which parts of this default you should change.