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SaaS Development10 min read

Building a SaaS platform: the complete guide

April 14, 2026·VirtuoLab

Building a SaaS platform: where do you start?

Building a SaaS (Software as a Service) platform is one of the most lucrative digital investments you can make. But it demands a well-considered approach.

What is a SaaS platform?

A SaaS platform is a web application offered as a service over the internet. Users pay a subscription (monthly or yearly) to get access. Think of tools like Slack, Notion or Exact Online.

The 5 phases of SaaS development

Phase 1: Validation & discovery (2-4 weeks)

Before you start building, validate your idea. Is there market demand? Who is your audience? What sets your solution apart?

Phase 2: UX/UI design (3-5 weeks)

The design of your platform determines the user experience. We design wireframes, prototypes and a complete design system.

Phase 3: Development (8-16 weeks)

The actual build of the platform. We work in 2-week sprints so you see progress continuously.

Phase 4: Testing & QA (2-3 weeks)

Extensive testing of functionality, performance, security and usability.

Phase 5: Launch & growth (ongoing)

After launch we monitor performance, gather user feedback and build new features.

Technologies for SaaS development

ComponentTechnology
FrontendReact, Next.js, TypeScript
BackendNode.js, Python, Go
DatabasePostgreSQL, MongoDB
HostingAWS, Google Cloud, Vercel
PaymentsStripe, Mollie
AuthNextAuth, Clerk, Auth0

The cost of a SaaS platform

An MVP (Minimum Viable Product) starts at €15,000. A fully developed platform with all features typically costs €30,000 – €80,000.

Ready to start?

At VirtuoLab we have experience building SaaS platforms across a range of sectors. Get in touch for a no-obligation conversation.

Ready to get started?

Get in touch for a no-obligation conversation about your project. We're happy to think through the best approach with you.