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Startup ideas with revenue receipts, reverse-engineered from founder interviews.

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TierT1T2T3EvidenceVerifiedFounderCreatorUnprovenEvergreenWindow
Simple Tool ↓
AI ContentAI E-commerceAI ServiceAI WebsiteConsumer AppDigital PublishingDirectory SiteEcosystem ToolPlatform PluginSaaSScale ReferenceSimple Tool⚠️ Cautionary Tale
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RevenueIdeaCategory · Evidence · Difficulty
#1
$60K/moT3
AI-Built Single-Page Read-Later App (Single-page Read-Later App / Replit)
Build a Pocket-style, distraction-free read-later app in a few hours with one tool (Replit), monetized twice over with a $19.99 Stripe annual membership plus Google ad-network revenue — the thesis being that the most profitable apps are actually the most minimal ones
Simple ToolT3
Simple Tool
#2
whitescreen.on…T3

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whitescreen.online / whitescreen.dev — 800,000 visits a month for maybe $2,000
A page that shows a blank white screen pulls 800,000 monthly visits and an estimated $1,500-$2,500 a month, because nobody arriving is trying to buy anything — the RPM lesson every boring-tool builder skips.
Simple ToolT3
Simple Tool