Simba Cai

I'm a solo founder who loves building products people actually use.

I build AI-powered SaaS, explore underserved markets, and enjoy turning complex problems into simple tools.

Currently building in public and sharing everything I learn—from product ideas and launches to growth experiments.

Products

AI products I'm building for founders and global users.

Rivallens
Rivallens is an AI Startup Intelligence Platform that helps founders reverse engineer successful AI products. Analyze any AI startup URL to uncover business models, pricing strategies, competitors, growth signals, and market opportunities — then continuously monitor changes and make better product decisions.
Building in PublicPre-revenue

Recent activity

How do founders actually research competitors before launching?

I tested a voice journaling app idea on our own tool. The result was uncomfortable.

AI builds apps in a weekend, but finding "WHAT" to build still takes weeks

104 days building Debnix- Full story

How I stopped doing competitor research wrong!

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