★ B2B SaaS · stack
Best Tech Stack for a B2B SaaS MVP
My opinionated stack for a B2B SaaS MVP, layer by layer, with why I'd pick each tool and what would change my mind. Adjust the answers to fit your team.
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Your stack
Tech stack for B2B SaaS
9 layers, picked for your answers. Boring where it should be, so your effort goes into the product.
- Frontend
Next.js (React + TypeScript)
Server rendering for SEO, file-based routing and the biggest React ecosystem. TypeScript end to end catches whole classes of bugs before users do.
- What would change my mind
- A purely internal tool with no SEO needs, where a plain Vite + React single-page app is simpler.
- Alternative
- Vite + React SPA, or Remix / React Router
- Backend / API
Next.js route handlers + server actions
No separate service to deploy: the API lives next to the UI and shares types with it. Plenty for an MVP and well beyond.
- What would change my mind
- Several clients (mobile, partners) hitting the API, long-running work, or a separate backend team.
- Alternative
- A standalone Node.js + Fastify service
- Database
PostgreSQL (managed: Neon or AWS RDS)
Relational, transactional and boring. JSON columns cover the semi-structured bits, and pgvector covers embeddings if you add AI.
- What would change my mind
- Truly schemaless, write-heavy event data at very high volume. Add a specialised store for that slice only.
- Alternative
- MySQL, or MongoDB for document-shaped data
- Auth
Clerk
Prebuilt sign-in UI, organisations, roles and MFA. Hours instead of weeks for a B2B-ready login.
- What would change my mind
- Per-user pricing at consumer scale, or a hard requirement to keep auth in-house.
- Alternative
- Auth.js (NextAuth)
- Payments
Stripe (Razorpay if your customers are mostly in India)
Checkout, subscriptions, invoices and webhooks with the best docs in the business. Marketplaces use Stripe Connect for payouts.
- What would change my mind
- A market or payment method Stripe doesn't serve well, or merchant-of-record needs (tax handled for you), where Paddle or Lemon Squeezy fit.
- Alternative
- Paddle (merchant of record)
- Hosting
Vercel
Git push to deploy, preview URLs for every branch and no servers to manage, which is exactly what an MVP team needs.
- What would change my mind
- Long-running processes, heavy compute or strict data-residency requirements.
- Alternative
- Netlify, or Railway for a container
- Background jobs
Inngest or Trigger.dev
Durable background functions with retries, schedules and a dashboard, written in the same TypeScript codebase.
- What would change my mind
- Very high throughput or strict data residency, which points to a queue in your own cloud.
- Alternative
- BullMQ + Redis
- Analytics
PostHog
Product analytics, funnels, session replay and feature flags in one tool, with a generous free tier.
- What would change my mind
- A marketing-only site, where a simple privacy-friendly counter like Plausible is enough.
- Alternative
- Plausible (simple), or Mixpanel
- Email
Resend
Reliable transactional email with a clean API and good deliverability defaults.
- What would change my mind
- Marketing campaigns and newsletters, which belong in a separate tool.
- Alternative
- Postmark
This is the stack I'd pick.
Want me to build on it? I ship MVPs on exactly this kind of stack.
What makes a B2B SaaS different
A B2B SaaS lives or dies on multi-tenancy: every row belongs to a workspace, every query is scoped to one, and billing state has to stay in sync with the payment provider. Pick tools that make tenancy, roles and subscriptions easy, because the core feature is usually the smaller part of the build.
Risks to plan for
Tenancy bolted on late
Adding workspaces after launch means touching every query. Model the organisation from the first migration.
Billing drift
Your database and Stripe disagree about who has paid. Treat webhooks as the source of truth and make handlers idempotent.
Enterprise asks
SSO, audit logs and data export arrive with the first big customer. Choose an auth provider that can grow into SAML.
The stack at a glance
With the preset answers for a B2B SaaS (you can change them above), this is the stack layer by layer.
| Layer | Pick | Alternative |
|---|---|---|
| Frontend | Next.js (React + TypeScript) | Vite + React SPA, or Remix / React Router |
| Backend / API | Next.js route handlers + server actions | A standalone Node.js + Fastify service |
| Database | PostgreSQL (managed: Neon or AWS RDS) | MySQL, or MongoDB for document-shaped data |
| Auth | Clerk | Auth.js (NextAuth) |
| Payments | Stripe (Razorpay if your customers are mostly in India) | Paddle (merchant of record) |
| Hosting | Vercel | Netlify, or Railway for a container |
| Background jobs | Inngest or Trigger.dev | BullMQ + Redis |
| Analytics | PostHog | Plausible (simple), or Mixpanel |
| Resend | Postmark |
Want the price tag too? Run the same product through the B2B SaaS cost estimate.
Questions founders actually ask
Is Next.js enough for a SaaS backend?
Should I build multi-tenancy with separate databases?
Clerk or Auth.js for a B2B SaaS?
Why does the picker recommend boring technology?
Is this stack good enough to scale?
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Or start from a blank slate with the full tech stack picker.
More from the workbench
Fine print
Tools: on the house.
Engineer: by the hour.
The opinion was free. The implementation is where I come in.
I'm Himanshu, an AI and full-stack engineer. I build MVPs, AI agents and the growth plumbing around them for early-stage startups.