25 of 406 ideas

An AI assistant built for lawyers, sold to Thomson Reuters for $650M in cash

One tiny job — pick a meeting time — where every single use of the product is also an advertisement for it, bootstrapped past $30M ARR before a dollar of outside money

Cover an entire syllabus once and the audience regenerates every semester: a tutoring channel reported to earn over $82,000 a month from AdSense alone while its last upload sits three months in the past.

$500-3,000 of equipment — inflatable screen, projector, speaker — that pays for itself in one to six rentals, in a category where one operator does $3-4M a year

$1.6B in a quarter growing 85%, 150% net revenue retention, and a sales motion that compresses a year-long enterprise cycle into a five-day workshop on the customer's own data.

A non-technical course seller built his own ClickFunnels alternative for the audience he already had, and now pays affiliates $100K a month to sell it for him

Buy panels, drop them at a construction site, collect rent for eight months while doing nothing — $20-30K per job, sold for $600K after 18 months

Nine years of running other people's e-commerce projects as an agency, then a from-scratch rewrite nobody thought was needed — and a partner channel that took four years to work and now sources 35–40% of every new deal

Two cousins with $68,000 and no baking experience borrowed the streetwear industry's weekly drop mechanic, rotated their menu every Sunday, and turned manufactured scarcity plus 16 million social followers into a billion dollars of systemwide sales

The back office for hiring anyone anywhere — $1M to $100M of revenue in 20 months, 1,300 people across 80+ countries, and never a single office

A monthly hands-on project crate for kids that has shipped 50 million boxes and over $1B in lifetime revenue — profitable since 2016, under 150 staff, under $11M ever raised, and its own warehouse for fourteen years

Process a Kenyan merchant's payments, watch their real cash flow, then lend them unsecured working capital and take repayment as a percentage of the money already flowing through you

Since 2010 it has financed 500 software companies across 1,500 separate rounds and about $500M deployed, on one product: up to roughly half your annual recurring revenue, no warrants, no personal guarantee, no board seat, repaid at about 1.3× over three years

Built in India, sold only to North American enterprises: $20M of revenue from fewer than 50 customers at $350K average contract value, now $40M+ a year

An operating system that runs inside the screens in shops, malls, coffee chains and lifts — it measures who looked, who picked the product up and who paid, then resells all those screens as a local ad network

Rejected by Y Combinator for having no proof, a Lagos developer stopped building and personally called about 150 businesses — the 400-merchant waiting list he got back was the proof, and the company later sold to Stripe in a deal reported at $200M

Five brothers put £600 into a boot-sale fragrance stall in East London and built a halal perfume chain with 20+ shopping-centre stores — no bank loans, no interest, no external investment

A second-time founder refused to sell his first ten customers through referrals or friends, closed all ten cold off LinkedIn at $10K–$20K a year, and built a procurement company that raised about $370M and closed a Series D at $2.2B post-money