SaaS (Software as a Service)
SaaS is a business model where software is delivered over the internet as a subscription service rather than sold as a one-time purchase. Users access the application through a browser, and you charge monthly or yearly. For vibe coders, SaaS is the most common product type to build — it provides recurring revenue from software you host and maintain.
Example
Instead of selling a downloadable app for $50 once, you build a web-based tool at $19/month. 100 subscribers means $1,900/month in recurring revenue. Users always get the latest version, and you have predictable income.
SaaS is the default business model for vibe-coded products. Build once, charge monthly, improve continuously.
Why SaaS Works for Vibe Coders
- Recurring revenue — Predictable income from subscriptions
- Web-based — No app store approval, instant updates
- AI-powered — Many SaaS products use AI as a core feature
- Scalable — Same code serves 10 or 10,000 users
- Fast to build — AI accelerates the development cycle
SaaS Building Blocks
Every SaaS needs:
| Component | Purpose |
|---|---|
| Authentication | User login and signup |
| Dashboard | Where users do the work |
| Billing | Subscription management |
| Settings | User preferences and account |
| Landing page | Marketing and conversion |
SaaS Metrics That Matter
- MRR — Monthly Recurring Revenue (total subscription income)
- Churn — How many subscribers cancel each month
- LTV — Lifetime Value (total revenue per customer)
- CAC — Customer Acquisition Cost (cost to get each customer)
From Side Project to SaaS
- Solve your own problem — Build something you'd use
- Ship an MVP — Core feature only
- Get first users — Friends, communities, social media
- Add billing — Stripe, Lemon Squeezy, or Paddle
- Iterate based on feedback — Users tell you what to build next
Further Reading
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Related Terms:
Emergent — An agentic vibe-coding platform that builds production-ready apps