Your SaaS — without months lost to billing, auth and multi-tenancy.

For founders and companies launching a SaaS product instead of sinking half a year into infrastructure. Multi-tenant architecture, Stripe billing, auth and onboarding are the hard parts — already built and proven on this platform: forge12.com runs on exactly that. Typical projects from 25.000 €.

01 · Proof, not promises

This platform is our best reference project.

We don't talk about SaaS in the abstract — we run one ourselves. This website, the shop, the customer area, the licence and subscription system and the admin management all run on a multi-tenant architecture we built entirely ourselves. What we sell you, we run in production at home.

  • Multi-tenancy with strict data isolation per tenant
  • Stripe billing: checkout, subscriptions, webhooks, customer portal
  • Auth: passwordless, OAuth/Google, 2FA, SSO/SAML
  • GDPR: export, deletion, consent, audit logs
  • Admin & onboarding flows ready to use
SaaS platform architecture at Forge12 — dashboard and metrics
Why solid

A solid foundation vs. MVP botch job.

Rushed and botchedJust get it live, fast.
Built solidBuilt to grow.
data-leak risk between customers
Tenant isolation
enforced at the DB level
double charges, chaos
Billing
Stripe clean & idempotent
breaks under load
Scaling
carries growth
rewrite needed
Build-out
on the foundation
red flags
Investor check
passes the audit
An expensive rewrite ahead
Result
Holds from MVP to scale

The most expensive SaaS mistake is bad multi-tenancy — it costs trust that doesn't come back.

02 · The SaaS building blocks

What a SaaS really needs.

Auth & SSOLogin you can trust.Passwordless, Google login, 2FA and SAML for enterprise customers.
GDPRCompliance built in.Data export, deletion, consent management and audit logs.
Admin & onboardingOperational from day one.User, subscription and order management plus guided onboarding.
03 · How we build

From concept to paying customer.

01

Discovery

We sharpen the business model, plans and data model — and set the multi-tenant boundaries early, before they get expensive.

02

MVP with billing

The shortest version that can take real money: the core feature plus auth and Stripe checkout.

03

Build-out

Plans, limits, onboarding and admin step by step — each in clearly scoped sprints.

04

Scale

Monitoring, caching, background jobs and zero-downtime deploys for growing load.

In numbers
2.008
Founded
0+
Projects delivered
0+
Years of experience
< 0 h
Response time
FAQ

Common questions about SaaS projects.

01Do you have hands-on SaaS operations experience?

Yes — this platform is one. The website, shop, customer area, licence and subscription system and admin management all run on a multi-tenant architecture we built ourselves and operate in production. It's our best reference project.

02What does it cost to have a SaaS product developed?

The price depends on feature scope and the maturity you want — from a lean MVP to a scalable platform. We work audit-first: in an initial audit we clarify feasibility, architecture and scope, and you get a fixed-price offer before development starts.

03How long does it take to build a SaaS MVP?

The goal of the first MVP sprint is the shortest version that can take real money: core feature, auth and Stripe checkout. We fix the date in the offer; then we build plans, onboarding and admin step by step.

04What's the difference between an MVP and a finished SaaS product?

An MVP focuses on the one core use case that convinces paying users — fast to market to gather feedback. The full product adds plans, limits, roles, onboarding and scaling. We build so the MVP stays the foundation of the finished product.

05What is multi-tenant architecture and do I need it?

Multi-tenancy means several customers share one application but each sees only their own data — enforced at the database level. For nearly any B2B SaaS it's essential; clean tenant separation is where most MVPs fail later.

06How is billing with Stripe and subscriptions implemented?

We integrate Stripe fully: checkout, recurring subscriptions, plan limits, proration and idempotent webhooks, plus a self-service customer portal. Plan limits are enforced server-side, not just hidden in the frontend.

07Is my SaaS GDPR-compliant (EU hosting, SSO/2FA)?

Data protection is part of the architecture: data export, deletion, consent and audit logs. Alongside passwordless login, Google login and 2FA we implement SAML SSO for enterprise customers. We host in the EU on request.

08Which tech stack suits a scalable SaaS?

We use React/Next.js on the frontend, Go on the backend, PostgreSQL and Redis — the same stack this platform runs on. For growing load we add caching, background jobs and zero-downtime deploys.

09Who owns the code and how do hosting and maintenance work after launch?

The repository, infrastructure setup and docs are yours — no lock-in to us. On request we take on operations, monitoring and further development; alternatively we hand over cleanly to your team.

Straight talk

What might still hold you back.

01You're a single founder — what if you're unavailable?

That's exactly why every project is built to be handed over: a standard stack instead of exotic tools, clean and tested code, documented architecture and deployment — and the repository is yours. Any competent developer can carry on without me. You're never chained to one person.

02Will the budget run away from me?

No. The project is cut into milestones with a fixed scope and a fixed price. You pay per milestone, get a working result after each one, and decide whether to continue. No open-ended hourly tab, no surprise on the invoice.

03Can one person deliver as fast as an agency?

Often faster. No coordination overhead, no ticket ping-pong, no friction between junior and senior — you talk directly to the person who builds. If scope grows, I bring in vetted partners selectively, always transparently agreed.

04What if I later want to continue in-house or with another provider?

Then you take the code, the docs and all access with you — it's yours anyway. I deliberately build in no dependency that locks you to me. Good work doesn't need a lock-in clause.

05We don't have paying customers yet — is it too early to build?

Then we deliberately start small: an MVP that does exactly the one thing that wins you customers — multi-tenant, billing and auth built properly, but without feature bloat. You validate in the market before investing in breadth.

An objection we didn't cover?Write to the founder directly
START SMALL

Got a SaaS idea? We'll assess feasibility & architecture in an audit sprint — credited against any follow-up engagement.

SaaS Development — From MVP to Product · Forge12