How much does it cost to build a SaaS product?

A focused MVP typically ranges $40K–$120K depending on scope. We scope to a fixed outcome after a product workshop so you are never billed into an open-ended build.

Can you take over an existing SaaS codebase?

Yes — we run a code and architecture audit first, then stabilise and scale rather than rewrite by default.

How long does a SaaS MVP take?

Most MVPs reach a first usable release in 6–10 weeks, depending on scope, using a senior-led team and a pre-hardened Next.js foundation.

SaaS Development

Build a SaaS platform you can still scale at 10,000 customers.

CoreFi engineers multi-tenant SaaS products that ship fast and hold up under growth — the architecture, the billing, the security and the performance, designed in from day one.

Book a product strategy call

The hidden cost of the wrong first architecture

Most SaaS products are not killed by competition — they are killed by their own first architecture. A rushed build wins the demo and then collapses under multi-tenancy, billing edge cases, role permissions and the load of real customers. Re-platforming mid-growth is the most expensive mistake a SaaS company can make. CoreFi is built to make sure you only build it once.

Why founders and product teams choose CoreFi

Architecture-first

Multi-tenancy, data isolation, billing and auth designed before the first feature, not bolted on after.

Senior engineers

Engineers who have shipped SaaS at scale — not a learning team on your runway.

Pre-hardened foundation

A Next.js + cloud foundation that cuts weeks off time-to-first-release.

Outcome-scoped

We commit to a release date and a working product, not an open-ended hourly bill.

What we build

Capabilities

Architecture

Multi-tenant data model, tenancy isolation, scalable service design

Product

Core feature build, dashboards, admin, onboarding flows

Billing & Auth

Subscriptions, usage metering, SSO/RBAC, secure identity

Integrations

APIs, webhooks, third-party and AI service integration

Scale & Reliability

Performance, observability, CI/CD, infrastructure-as-code

Our process

How we deliver

Product workshop

Define the smallest scalable v1.

Foundation sprint

Tenancy, auth, billing, CI/CD live in week one.

Build sprints

Weekly demos, shippable increments.

Launch & scale

Hardening, observability, and embedded growth.

Business outcomes

6 wkMedian time to first paying customer

0Re-platform tax with scalable architecture

40%Lower burn per feature shipped

Technology stack

What we build with

Next.jsReactNode.jsTypeScriptPostgreSQLPrismaStripeAuth0AWSDockerTerraform

Frequently asked questions

Tell us what you're building.

We'll show you the fastest credible path to ship it.

Book a product strategy call

A senior engineer on the first call. No sales handoff, no obligation.