coldcaller.pro is a French B2B prospecting SaaS selling qualified cold-calling leads to solopreneurs and agencies. Leads come enriched with the owner's direct mobile + email. Subscriptions €19–99/mo, no free trial, ~9% visitor-to-paid conversion, €2.4k MRR with minimal fixed costs (93% margin). 100% community driven acquisition (word of mouth). Runs solo — big upside with paid ads or a sales team.

Web-based AI image editing tool for creators and small businesses. Users upload an image and get a polished, AI-edited result in under a minute - no design skills needed. Monetized through Stripe with pay-as-you-go credit packs plus monthly and annual subscriptions. Fully automated, solo-operated, ~90% margin. Traffic is organic (search + social), no paid ads.

You'll have to figure it out.