Every teardown
The whole library, oldest id first. Every business we have taken apart.
365 teardownsVAT filing for people who refuse to leave Excel.
HMRC owns the rails
Where designers buy five-figure furniture online.
The job board for 4-day weeks — now a 500K audience.
A free weekly photo challenge, monetized after a decade.
solo, weekly, forever
One line of code, sold as instant ADA compliance.
clones
HIPAA compliance built for SMBs, not hospitals.
White-label client reports for marketing agencies.
Roadmap software. No VC, no sales team, $100M+ ARR.
The odd-jobs marketplace that traded shares for airtime.
The investor database that programmatic SEO sold
lists copyable
Sales-tax autopilot, built only for SaaS.
Sells software lifetime deals to a 1.5M-buyer list.
Astrophotography's default gallery + gear database.
Free birth charts for 80M - AI reads them for pay.
ADA-lawsuit insurance, delivered as a script tag.
Sales tax on autopilot for 13,000+ US jurisdictions.
Ugly-on-purpose wireframes designers keep paying for
Fans buy music direct — and artists keep about 82%.
The site builder that takes 0% of what artists sell.
PDF bank statements in, clean spreadsheets out.
a script anyone can copy
Subscription analytics run in public, sold for $4M.
Local-service marketplace where pros buy leads
WooCommerce plugins built from client requests
Blogging stripped to words. No JS, no trackers.
Where a $30 beat becomes a No.1 record.
The habit tracker that charges you when you fail.
The startup directory that charges you to skip its line.
directory = a weekend clone
Automating the salary-survey chore comp teams hate.
India's paid matchmaker, one caste at a time
Real estate's town square — a free forum, 3M+ members.
under 1% pay
Boring safety software. 99% of customers never leave.
Sell part of your SaaS — cash out, keep control.
buyer pool owned by rivals
DIY app builder for SMBs. Bootstrapped, sold $20M+.
Auto-pins your blog to Pinterest for free traffic
Notarize documents online — matched to a live notary.
commodity RON, price war
Deep C-suite dossiers, licensed to B2B sales teams.
Turns dental practices into subscription businesses.
One booking OS for any rental business.
One login replaces the 18 a booster club juggles.
The brewery software that actually does your beer duty.
Client dashboards MSPs run on top of their PSA tools
Headless browsers as an API, rented by the second.
Fingerprints a site's tech stack — then sells the reverse.
No-bloat newsletters. Flat price, 0% author cut.
A crowd abroad shops luxury for you — guaranteed real.
Two ex-Facebook founders. One feedback tool. No funding.
A one-page site builder — 4M+ sites, nearly solo.
Websites that rank for 'we buy houses.'
Podcast hosting sold through a free WordPress plugin
Curated auctions where experts vet every lot
Ranchers' herd records, bootstrapped since 1999.
The shared cellar book wine geeks all write in.
Custom AI support agents from your own docs.
The guest-registration law, handled in one tap.
Global marketplace for pre-owned luxury watches.
Bootstrapped B2B stores synced to legacy ERPs
The POS running 5,000+ laundromats worldwide.
India made GST filing the law. Clear became the rails.
The claims desk for storm-chasing insurance adjusters.
Bootstrapped clinic software, built with an osteopath.
Courses for the 600k voice-acting crowd he owned
Photo-delivery galleries pros sell prints through
One ERP that runs the whole golf course.
Japan's skills flea market — design to fortunes.
No-bidding WordPress marketplace, vetted pros
The marketing team realtors rent for $74 a month.
Every crypto trade is taxable. They rank #1 for it.
Built the crypto tax plumbing before the IRS ruled
Book a creator like you book an Airbnb.
Your card collection, priced like a stock portfolio
GDPR forced a banner. He already owned the audience.
Bootstrapped the KYC check every fintech must run.
A no-code game engine, in your browser.
SEO content tool that sold fast on Acquire.com
Chasing clients for files, bottled and sold monthly.
The cookie banner the law made you add.
banner is a commodity
Open-source Heroku you run on your own server.
Inventory + true-cost bookkeeping for makers
niche TAM · revenue hidden
Japan's curated craft market out-earns its rival.
The accuracy-obsessed answer to MyFitnessPal.
The job board that rode the 2017 crypto gold rush.
Where 3D designers get paid, not just liked.
Leads on startups that just raised, for agencies.
The spreadsheet-killer for property investors.
easy to clone
Spot a run-down house, mail its owner in one tap
China's paid-knowledge app of curated expert courses.
Fans built the database. Discogs takes 9% of sales.
France's marketplace for buying and selling websites.
Gave away HIPAA-compliant video. Kept 30% of telehealth.
The CRM a painting contractor built for his own trade.
AI turns any product into a Shopify store in 2 minutes
Bought DudeRanch.com; the domain does the marketing.
one niche, about $50K/yr
The Ryanair of email marketing
Buy & sell online businesses — vetting is the moat.
lumpy, deal-by-deal
The bootstrapped stock-asset market that paid out $1.3B
The anti-overlay accessibility checker for WordPress.
Bootstrapped Carta rival, driven by the 409A rule.
SEO keyword data for sellers Etsy keeps blind.
on Etsy's rented land
German law makes every website buy legal texts.
Estimates what any Etsy listing earns — live.
Track every affiliate, partner and payout in one place.
crowded, copyable category
E-file the truck tax the IRS forces on every big rig.
School bullying app the law turned into B2B.
The invoicing app Poland's VAT law made unavoidable.
By law, every gun dealer logs every gun. We're the log.
When EU law bans Google Analytics, you buy this instead
Student built invoicing. Then Italy made it law.
A cheaper Canny that ranks for "Canny alternative."
One-click lesson feedback for ESL teachers
Where photographers buy and sell presets.
Practice software for accountants. $0 VC, 70+ staff.
The filing rails for whatever FinCEN mandates next.
Airbnb for fishing charters, bootstrapped in Serbia.
Germany made POS security a law. fiskaly made it an API.
A note app that wins by doing deliberately less.
a note app clones in a weekend
Security audits for Bubble apps — bought by Bubble.
100% on one platform
Brazil forces e-invoices by law. He's the API.
The CRM every real-estate team runs their leads through.
Social-proof popups, bought with the app's own cash.
Build the HACCP plan the law demands — in an hour.
crowded HACCP field
The whistleblower channel EU law forces firms to buy.
The virtual tabletop you buy once, not rent.
Plugin devs sell; Freemius handles tax and billing.
Filing is the law. They gave away the federal part.
Where junior devs practice on real design files.
Shop software for heavy-duty diesel truck repair.
A GPS treasure hunt, sold as a subscription.
Guess your spot on Earth from Street View — paid only.
The anti-WordPress, run as an unsellable non-profit.
Proposal and pricing software for accountants.
one vertical, UK-first
The pest-control CRM built by a pest tech.
You can't ship a medical device without a QMS.
Made mandatory EU carbon reports a self-serve SaaS.
CSRD scope cut 80%
Uber for lawns, built by an ex-lawn-care mogul.
One flat fee, unlimited calls with vetted mentors.
free supply can walk
The cloud solver that made poker study a subscription
Mined Reddit's complaints, sold them to founders
lived and died on Reddit's API
Sell any digital product from one storefront — flat 10%.
Gym software a black belt built to beat MindBody
Bootstrapped PSA that MSPs quit Kaseya for.
One-man cron-job watchdog. Open-source. Profitable.
Two Amazon sellers turned EU VAT pain into a SaaS
The risk tool advisors used to keep clients calm.
Reads a tax return, writes a planning report.
Runs an Airbnb host's business: messaging to bookings.
The docs tool MSPs flee IT Glue for.
free OSS clone exists
Thread scheduling for X, born from one tweet.
The software a gymnastics-gym owner built for himself.
Spain's #1 property portal. Agents pay, buyers browse.
Identity checks you pay for only when they pass.
Poland forces digital tax filing. iFirma runs it.
Proposals that collect the payment on signing.
Find any company's overseas suppliers — free.
$0 raised · about $1M est
India's B2B directory where only sellers pay
Private multiplayer servers for survival gamers.
Self-funded test software vs VC-backed giants
He owned a millwork shop, then built its ERP.
The CRM layer agents add to their agency system.
Gave the IP API away. Sold the data underneath.
Every website's privacy policy, auto-updated forever.
The operating system for allied-health clinics
A dev job board that bills only when you hire.
Deadline software for accounting firms.
clones everywhere
One index for every niche job board on the web.
Built to run his own contracting firm. Now 7,500 use it.
Free booking app; the payments are the business.
AI LinkedIn writer sold to its founders' 585K fans.
Your crypto trades in, a ready-to-file tax report out.
Europe's outdoor map, bootstrapped to 45M users.
50 failed pitches, then partners sold it for him.
Cloud back-office for the labs that make your crown.
The anti-Salesforce CRM for small business.
Every forced Laravel upgrade, automated in one PR.
Free for contractors. The agency the law forces pays.
Reddit leads, minus the account bans.
Worldbuilding wiki for Game Masters, born on Reddit.
The merchant of record that files sales tax for sellers.
Power-user budgeting, at a price you choose.
The crowdfunding site Japan uses to launch products
Pretty, half-price SEO data that out-charms giants
The default software for pinball tournaments
Monthly mentors, not one-off gigs — built solo in Japan
Monthly 1:1 mentorship from people who've done it.
The forum Google built, then nearly killed.
The system 20+ states force on cannabis sellers.
Where software testers gather, learn, and get hired.
Collaborative team inbox: email, chat, tasks in one
Real app UIs, hand-tagged so designers can search them
The default software for countertop fabrication shops.
Bought a broken scraper for its traffic, not code.
AI support agent that plugs into Intercom or Zendesk
crowded; incumbents bundle it
File US taxes from abroad — flat fee, not a CPA bill.
about 9M expats, seasonal
The world's cheapest stocks, hand-picked for members.
one man, one SEO funnel
Find the best city to live & work as a nomad — by data.
niche + travel churn
Japan's ad-free platform for paid writing.
One 2018 ruling made sales tax hell. Numeral eats it.
Bloomberg Terminal for sports bettors.
Flat $69/mo to hire from 2M Filipino workers.
Practice software a dentist built to undercut Dentrix
Skiers pay for the one forecast they trust.
Google's ad evangelist quit, then built the PPC tool.
Owns the web's cookie banner, sells the paid platform.
Run your rentals, own your bookings. Flat fee.
Australia's deal hive — the crowd posts, ads pay.
Passive Instagram growth SaaS. Sold for $300K.
E-invoicing network riding a wave of tax mandates.
loss-making land-grab
Self-taught solo dev out-SEO'd Hootsuite to $74K MRR
Run a coaching business from one $57/mo app.
crowded coaching-CRM niche
Open-source DocSend — share decks, track every view.
code is forkable, moat is SEO
Free French company data. The paying 1% funds it all.
Turns emails and PDFs into structured data, no code.
HIPAA email with no portal, no passcode.
MS/Google could go native
Chat with your PDFs - a $20K buy now doing $50K/mo.
It reads your affiliates' ads before the regulator does.
A free Photoshop clone. One dev. $100K/mo in ads.
Paid bookmarking, one guy, no VC — profit is the pitch.
Japan's biggest stock-photo site, on local faces
Church software that made itself impossible to sell.
Beat Google Analytics on privacy — fully open-source.
UserTesting, but only for games.
human cost each test
Google Alerts, but for podcast audio.
Pool software built by a guy who ran 20 trucks.
Bootstrapped shop rents the web's most-trusted scanner.
Schedule one post to every platform, no bloat.
America's Cup weather tech, sold to every sailor.
The marketplace for 1-on-1 language tutors.
Google can't read JS sites. He hosted the fix.
Turns every eBay sale into the price of every game.
A screen printer built the software his shop needed
Plan your whole financial life, no bank linking
Vetted humans for research, now for AI.
Amazon keyword research authors buy once.
one-time sale, no recurring
The class-pass tool for studios Mindbody overwhelms.
When the EU rewrote VAT, Quaderno sold the fix.
Stripe can bundle the tax layer
50 lenders' loan calculators, one broker tool.
The tool that tracks Congress's stock trades.
Knitting's community — run profitably by about four.
FDA labels are the law - he made them $59.
tiny, price-capped niche
The accessibility widget the law makes you buy.
A 'poor man's Loom,' flipped for about 1.7x.
Dad's decades in staffing = day-one users.
Vetted marketplace where indie authors hire book pros.
Free Google traffic, sold back to job seekers.
seekers cancel once hired
Remote jobs board grown from a niche newsletter.
A landlord coded his own rent tool — now $14M/yr.
crowded
The POS a phone-repair shop runs all day on.
One dev owns the search result Poshmark resellers tap.
A real-estate wholesaler built the CRM he needed.
eBay for musicians, built by a guitar-shop owner.
Fair-price Trustpilot rival, sold for $72M.
Two brothers out-planned Fidelity and Envestnet.
Where 10 million play D&D without a table.
rides on D&D's IP
The grandson turned grandpa's fleet software into SaaS.
Free for race directors; a small cut of each signup.
Turned the mandatory safety audit into an app.
Japan runs on business cards. Sansan digitized them.
Scheduling built for the guest, not the host.
Two devs SEO'd a scraping API to a $5M exit.
One dev sells the screenshot infra devs hate running
clones undercut 2-4x
The award-flight search engine airlines sued.
The net profit Amazon hides - for $19 a month.
Collect testimonials, show them off as social proof.
SEO A/B testing, powered by Google's own data.
The SERP API that quietly became AI's search backend.
rents its data
Job software for tradies, built Apple-first.
The no-code platform behind 1,000+ marketplaces.
Google indexes web pages. Shodan indexes devices.
The back office for custom sign and print shops
One bootstrapper's $10 answer to DocuSign.
The free accessibility checker that upsells compliance.
Google Analytics got banned in the EU. He sold the fix.
Commission Japanese artists - no chat, no revisions
The default app for the guy who cleans your pool
Stock baskets that trade as one, via your broker.
Airbnb for dogs: rent a private yard by the hour.
The social tool sold by hand before it was built
Sheet music you can click, loop and slow down.
The moat was the founder's audience, not the code.
niche market by design
Home inspector software, bootstrapped $0 to $27M
finite US inspector TAM
The browser countdown timer behind SpaceX shows.
A recruiter turned CV advice into the UK's #1 CV site.
The stock-photo co-op its photographers own.
The operating system for staff-free self-storage.
One API for compliant e-invoices in 30+ countries
Ran a storage business, sold the software instead.
A boring store-locator, built to be bought.
The Goodreads escape hatch readers actually love.
The CRM a wedding photographer built for himself.
Musicians pay to guarantee a curator actually listens.
AI scriptwriter for YouTube, pre-sold before it existed.
The AI writing partner built only for fiction.
Shopify's invoices aren't legal. Sufio's are.
The ID check every regulated app is forced to buy.
Marketing data pulled into the sheet you already use.
A free Slack for content marketers, monetized 4 ways.
The used-electronics market without the scams
The marketplace matching newsletters with brands.
platforms can build it native
Airbnb for backyard pools — rent one by the hour.
Court-proof messaging for divorced co-parents.
The beautiful form builder that stays free.
Made a no-code tool buyable, then took a 7-figure exit.
Salesforce-native onboarding app, bootstrapped to $10M
The IRS made e-filing mandatory. They sell the button.
One login replaces a firm's six accounting tools.
E-commerce sales tax a court made mandatory.
Workout-programming software for strength coaches.
Let game servers sell in-game perks — for a 5% cut.
rides games it can't own
A shop owner built the software he wished he had.
A privacy attorney's policies that update themselves
AI drafts one free
Collect testimonials, embed a Wall of Love.
Mass texting SaaS, now owned by its staff.
Why can't you text a business? They fixed that.
Bought a $250K side project. Grew it to $7M ARR.
Event ticketing at a flat fee, not a % of the sale.
Spot shifts, no resume, no interview, paid same day.
Branded title-quote apps that win agent loyalty
Where 450k fans pick their productivity tools.
The top 3% of freelance talent, sold at a premium.
Dispatch, impound and billing for tow companies.
The startup database global VCs rent, built in India
Podcast hosting for indies — grown as a calm company.
calm by choice
Reservable truck parking on other people's lots.
3 SEO influencers rented out their group chat.
Scheduling, billing and payments for tutoring firms.
Twitter growth tool, sold to its power user.
Open-source no-code chatbot builder, run solo.
The power-user UI ChatGPT forgot to build.
The scoreboard for 90% of disc golfers.
Gets clients to explain their mystery transactions.
The simple site builder that sold for $800K.
IT-freelancer network with a fair, time-limited fee.
one region · fee ends at 6mo
The cookie banner became a $117M business.
Customer feedback, native to Intercom.
Onboarding SaaS. 3 people. $60M exit.
Screenshot and annotate bug reports for product teams.
crowded feedback niche
One line of code, 'instant' ADA compliance
PTO tracking built inside Slack, not bolted on.
One upload. Ten marketplaces. Zero retyping.
Europe's clothes resale. Buyers pay, sellers don't.
Free visa data. $22K/mo. One guy in Sydney.
Hire a pro voice actor in a day — Voices takes 20%.
The call-center engine built for car dealerships.
A social-media wall for events, websites and displays
Free finance forum that sells interview courses.
rides on Google traffic
Hiring by mission, not resume — flat monthly fee.
Detects any site's tech, then sells the list.
The dentist's office phone, now a public NYSE SaaS.
A PT built the software her whole field learned from.
One snippet makes any site multilingual and SEO-ready.
crowded field
Quoting software for security-system installers.
The whistleblower who built the whistleblowing app.
The marketplace for Gen Z's digital hustles
Institutional-grade stock data for $5 a month.
The email hack they built for themselves went public.
A mandate forced XBRL filings. They owned the tool.
GAAP-loss years
The indie-games job board built by a 20-year insider.
Build your fictional world — a wiki for writers & GMs.
small TAM · free-heavy
One dashboard to run every client's WordPress site.
easy to clone
Ask your exact B2B buyers, get answers in 48 hours.
Free software for 20,000 lawn crews. 7-person team.
The law says prove your age - Yoti sells the proof.
A $29 Typeform rival that turns free forms into ads.
Booking software for maid services, and only them.
Cleans your email list so campaigns land, not bounce.
India's biggest stock broker, built on zero ad spend