SaaS & apps
Solo developer income: micro-SaaS, browser extensions, mobile apps, AI-wrapper tools.
Solo developer SaaS is one of the most rewarding passive-income models for technical readers — and one of the most punishing for non-technical ones. The asymmetry: a working codebase compounds at near-zero marginal cost; a buggy or undifferentiated one rots fast.
The pillar covers micro-SaaS economics (what’s earning real money in 2026), browser extensions on Chrome/Firefox stores (still wildly under-saturated), mobile apps (the consolidation post-2020 reshaped the playing field), and the AI-wrapper apps boom + the cliff that ends most of them.
NOT here: “build a SaaS in a weekend” advice. Real SaaS is years of compounding, not weekends.
2 ideas
Browser Extension as Solo SaaS
One of the most underserved markets in 2026 — Chrome Web Store has 200M+ daily users and shockingly few quality paid extensions in any given vertical.
Niche Marketplace as a Solo Product
The highest-ceiling business model for solo builders — but with the slowest cold start. Most fail in the chicken-and-egg phase. The math when they don't is asymmetric.