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

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38 of 406 ideas

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TierT1T2T3EvidenceVerifiedFounderCreatorUnprovenEvergreenWindow
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AI ContentAI E-commerceAI ServiceAI WebsiteConsumer AppDigital PublishingDirectory SiteEcosystem ToolPlatform PluginSaaSScale ReferenceSimple Tool⚠️ Cautionary Tale
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RevenueIdeaCategory · Evidence · Difficulty
#1
4x patient gro…T3
Legion Health
An AI-native psychiatry care network that 4x'd its patients without adding a single person
⚠️ Cautionary TaleT3
⚠️ Cautionary Tale
#2
$15MT3
Acquisition.io → Agentic Growth Firm (Serge Gatari)
A $7M-a-year growth consultancy being rebuilt as a one-person operation, where every job function becomes a playbook owned by an AI employee that reads from one shared context layer

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AI ServiceT3
AI Service
#3
$1MT3
Clarvo
An AI power dialer sold at $250/seat/month to call-heavy mid-market companies — 100-seat deals mean $300K ARR from a single customer
SaaST3
SaaS
#4
—PROT3
First Mover in an Emerging Shopify Market (Porto, Portugal)
Eighteen months ago Portugal had about three Shopify Plus brands and no Shopify staff covering the country. One agency lobbied the platform to staff it, became the local Plus partner, and now runs 32+ Plus accounts as the market grew towards forty.
Ecosystem ToolPROT3
Ecosystem Tool
#5
$94T3
Tech Automation Insider — a 30-day faceless YouTube channel with the receipts published
14 videos, 103 subscribers, 4,000 views and $94 in affiliate commissions for 30-40 hours of work — roughly $3 an hour, published honestly by the person who ran the experiment.
⚠️ Cautionary TaleT3
⚠️ Cautionary Tale
#6
£10,000T3
The fitness influencer income ladder — and the companies that build the businesses
An insider prices every rung of creator monetisation, from affiliate links up to selling the ability to sell — and names the quiet layer nobody discusses: firms that build and operate the apps, clothing lines and supplement brands that influencers appear to own.
Digital PublishingT3
Digital Publishing
#7
~$40M/yrT3
Hyros
An ad-attribution tool taken to a reported $40M ARR with no outside funding — by giving the software away free to the first thirty customers, installing it for them by hand, and trading results for testimonials before ever sending an invoice
SaaST3
SaaS
#8
13+ apps liveT3
Identixweb (13-app Shopify portfolio)
A Shopify dev agency that turned every repeated client request into a public app — 13 apps, 100,000+ installs, 70 staff, and an IPO on India's small-cap exchange
Platform PluginT3
Platform Plugin
#9
~$400K/moPROT3
Leftclick (AI automation agency) — and its founder's case for why the skill is expiring
The operator of a $400K/month automation agency explains, with his own P&L on the table, why the technical skill it runs on is about to be worth nothing — and what replaces it.
⚠️ Cautionary TalePROT3
⚠️ Cautionary Tale
#10
$12PROT3
Dual RTX 5090 AI rental rig on OctaSpace
An $8,500 GPU rig rented out to strangers for AI workloads at $0.50/hour — $12 a day, ~$365 a month, and a payback period of two to four years paid in a volatile token
⚠️ Cautionary TalePROT3
⚠️ Cautionary Tale
#11
$20KT3
Reflect
A beautiful notes app built for the founder himself, run at $20K MRR by a team of four — and funded by a $1M round raised from its own customers with a promise of dividends instead of an exit
USConsumer AppT3
USConsumer App
#12
$99PROT3
Kyle Gawley's SaaS Boilerplate — The Honest Timeline to $10K/Month
Four customers paying $99 once in year one. $1,500/month in year two. Three years to $10K/month — from a founder with 14 years of experience and an audience.
⚠️ Cautionary TalePROT3
⚠️ Cautionary Tale
#13
$414KT3
systeme.io
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
PTScale ReferenceT3
PTScale Reference
#14
~$8,000/moPROT3
Yorbie — Viral Content Database + Remixer (and the churn that followed the peak)
He quit big tech in October, built with zero revenue for two months, peaked at $8K/month by March — then watched it slide to $6.7K on churn and went back into a deep build phase.
⚠️ Cautionary TalePROT3
⚠️ Cautionary Tale
#15
$45,000T3
The Two-Year YouTube Automation Audit (Digital Income Project)
10 million views produced $45,000 of AdSense against $36,000 of costs — $9,000 profit in two years. The back-end products on the same channel do $50K-$125K a month.
⚠️ Cautionary TaleT3
⚠️ Cautionary Tale
#16
~£200KT3
27 Talent — a £550K/year agency that ran out of cash in five months
Four profitable years, £50-60K a month of fixed overheads, and one maternity leave: the month-by-month anatomy of how a London recruitment agency went from £90K in January to liquidation the following February
UK⚠️ Cautionary TaleT3
UK⚠️ Cautionary Tale
#17
~$12KPROT3
Algolia (selling into the US from Paris)
A French search API that grew from $12K MRR to 250 staff while its first business hire sold American enterprises from Paris using +1 415 phone numbers, midnight calls with the camera off, and a quarter spent on exactly thirty accounts
FRSaaSPROT3
FRSaaS
#18
~$300KPROT3
Botkeeper
Ten years and $100M+ building AI bookkeeping for accounting firms, three weeks from profitability — then eight clients cancelled their expansions in the same quarter, took a third of the revenue with them, and the company had to announce its own shutdown before an acquisition rescued it
US⚠️ Cautionary TalePROT3
US⚠️ Cautionary Tale
#19
$128,000T3
CodeTree — a nights-and-weekends SaaS sold for $128,000
A kanban layer on top of GitHub Issues, built on nights and weekends, listed with a broker in mid-May and sold for its full $128,000 asking price by mid-June
SaaST3
SaaS
#20
Over 100 milli…T3
commercetools
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
DEScale ReferenceT3
DEScale Reference
#21
$716T3
Ferryman — cross-platform post sync at $716 MRR in three months
Post once on your favourite platform and it syncs everywhere else — a solo build that went from concept to paying customers in a week and reached $716 MRR in three months, marketed entirely by LinkedIn posts and replying to whoever liked them
USSaaST3
USSaaS
#22
$1BT3
Crumbl
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
USScale ReferenceT3
USScale Reference
#23
$100M+PROT3
Deel
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
USScale ReferencePROT3
USScale Reference
#24
$10MT3
EchoSign (and the DocuSign comparison)
He took a nine-figure exit at $10M ARR growing 100% a year, cash-flow positive, on $8M raised — and spends this masterclass explaining why that was the stupidest decision available to him, using the $10 billion competitor as the control group
US⚠️ Cautionary TaleT3
US⚠️ Cautionary Tale
#25
~$10–15MT3
Gather AI
Off-the-shelf cameras on drones and forklifts turn a warehouse into a live inventory map — sold as an outcome, not hardware, at ~$500K a year per customer
USScale ReferenceT3
USScale Reference
#26
—PROT3
Katalon
A Vietnamese-built test-automation platform that spent three years not charging anyone, then used pure self-service to reach 65,000 business customers in 160 countries without hiring a sales rep in any of them
VNSaaSPROT3
VNSaaS
#27
$1B+PROT3
KiwiCo
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
USScale ReferencePROT3
USScale Reference
#28
KSh600MT3
Kopo Kopo
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
KEScale ReferenceT3
KEScale Reference
#29
$300/yearT3
LeadLedger — $35,000 spent, one customer, then a pivot that finally sold
A Monterrey founder paid a Pakistani dev team $15,000 to build an email-capture SDK for mobile apps and sold exactly one licence at $300 a year; the $20,000 pivot that fixed a leak people could actually feel sold licences off a single webinar — and then the money ran out
MX⚠️ Cautionary TaleT3
MX⚠️ Cautionary Tale
#30
—PROT3
Legora
An AI workspace for lawyers built by founders with no legal background — a document-by-query review grid plus a Word add-in that runs a firm's negotiation playbook against a contract and marks it up
SEScale ReferencePROT3
SEScale Reference
#31
500 companies…PROT3
Lighter Capital — lending against ARR instead of buying equity
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
USScale ReferencePROT3
USScale Reference
#32
$40M+T3
Observe.AI
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
INScale ReferenceT3
INScale Reference
#33
—T3
Octopus
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
TRScale ReferenceT3
TRScale Reference
#34
~$150K/moT3
Oro Health (and Dermago)
A dermatologist built the software her own telederm clinic runs on, then started licensing it to other doctors — the clinic bills $150K/mo and pays the software company half of it
CASaaST3
CASaaS
#35
—T3
Postscript — three years of humans in a Phoenix office, then the AI agent
Before shipping an AI selling agent, they ran a staffed e-commerce sales floor in Arizona where people conversationally sold for brands by hand — millions of real conversations that became the training set no competitor can buy
USSaaST3
USSaaS
#36
$22M+T3
Sanas
Real-time speech-to-speech accent harmonisation — a $20M check written before there was a product or a dollar of revenue, then $22M+ of revenue in the 18 months after launch
USScale ReferenceT3
USScale Reference
#37
£15MT3
Sunnamusk
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
UKScale ReferenceT3
UKScale Reference
#38
—PROT3
Zip — the cold-only first ten customers rule
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
USScale ReferencePROT3
USScale Reference