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SaaS Architecture & Startup Engineering · Lesson

The SaaS Subscription Business Model

Explore the economics and metrics that define SaaS as a business: recurring revenue, churn, MRR, and the unit economics that shape architecture decisions.

Software as a Recurring Service

SaaS sells access, not a one-time license. Customers pay a recurring fee for hosted software, which reshapes revenue, product, and how you measure success.

Recurring Revenue

SaaS earns recurring revenue, not one big sale. Two terms to know: MRR (monthly) and ARR (annual, roughly MRR times 12).

All lessons in this course

  1. What is SaaS?
  2. Monolith vs. Microservices
  3. Cloud Native Principles
  4. The SaaS Subscription Business Model
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