Hack2hire provides SDE interview questions with solutions in multiple languages for practice.

Glamour is an AI-powered personal color analysis app helping users discover their ideal color palette for clothing, makeup, and accessories. Users upload a selfie and get personalized seasonal color analysis via AI. Subscription model with strong retention (~9% churn) and zero refunds. Revenue grew from $222 to $15.8K MRR in 10 months through Meta campaigns in Turkey alone.

ESFERAS LLC provides LinkedIn automation tools.