Solopreneur case studies — 8/11
Solopreneur and side-business cases
169–192 of 256
Higher Scores Test Prep: Run 6 Hours a Week With Zero Employees, Sold for $180,000 — a “Thing I Was Going to Shut Down” Priced at 3x
Lauren Gaggioli ran her ACT/SAT prep courses solo, zero employees, six hours a week, and sold it for $180,000 (3x revenue) in September 2021 while still at roughly $60,000 in annual revenue. The turning point toward a sale she'd planned to shut down instead came from a single comment from a friend.
14 years of solo development to reach ¥1M/month — the revenue curve from 290,000 page views for ¥100,000 to 4.22 million page views for ¥1M
SiRO, a former systems engineer, reached ¥1M/month after 14 years of solo development. At ¥100,000/month, traffic was 290,000 page views; at ¥1M/month, it was 4.22 million. The turning point was abandoning user-submission-based services in favor of tool-type products — visible in the shifting revenue-per-pageview curve.
Six months on Coconala, ¥298,997 cumulative — the sequence of listing at the lowest price, reaching Platinum in three months, then raising prices
A freelancer earned ¥298,997 cumulative on Coconala over six months by pricing at the floor first, reaching Platinum rank in three months, then raising prices.
Investor Junkie: Nine Years, Not a Single Outsourced Article, 80% SEO — a $5.8M Sale, and the $1.3M Resale That Followed
Investor Junkie, an investment-comparison site built by former engineer Larry Ludwig, ran on 300,000 monthly unique visitors (80% from SEO) with fewer than five employees, and sold to XLMedia for $5.8M in 2018. Five years later, the buyer resold the portfolio that included this site for just $1.3M — a case instructive all the way through to the buyer's own eventual fate.
InteriorAI: An AI That Redesigns a Room From a Photo, at $40K a Month — The First Mass-Produced "AI × Existing Industry" Product
InteriorAI, which generates interior-design concepts from a photo of a room, earns $40K a month (about ¥6M). Like PhotoAI, it's one of the products Pieter Levels mass-produced early in the 2022 AI-image-generation boom — a case of "AI substituting for an existing high-cost service."
AppAlchemy: A Mobile App Builder Built in 2 Weeks Hit $10,000+ MRR in a Year — Finding an Open Seat
Diego Roshardt built an MVP in two weeks and started charging from day one. About a year after launch, he passed $10,000 MRR. The turning point was positioning — spotting that mobile was an empty seat while web-based AI app builders were booming — plus a single night of traffic from a major X account.
One vending machine on an apartment lot: 122,000 yen paid out, 3,778 units sold in a year — the 86,000-yen profit, broken down
A full-year record of one vending machine installed at a 24-unit apartment building. The operator received 122,000 yen from the vending company, sold 3,778 units, and after subtracting 36,000 yen in electricity, netted 86,000 yen in profit. The dips in August and January reveal exactly where the sales were coming from.
A 300-article general-interest blog crosses ¥1M/month — the numbers Unicoblog put in the bank in 1 year 3 months, and the AdSense it abandoned
Reona Kobayashi's "Unicoblog," launched Jan 2020, hit 300 articles by April 2021 and started clearing over ¥1M/month by bank transfer, while AdSense revenue fell from ¥100K to ¥10K/month.
HeadshotPro: $100K ARR in 14 Days, Then Up to $300K MRR — Examining the AI Headshot Business
HeadshotPro, an AI headshot service built by Dutch developer Danny Postma, hit $100K ARR just 14 days after launching in March 2023, and has since climbed to $300K MRR ($3.6M ARR). 14 million photos generated, 190,000 customers. The acquisition-channel numbers are public too — over $50K a month from affiliates alone.
Taking over a grilled-fish specialty restaurant via M&A — one month of handover, six months chasing the floor, and the lunch sales that finally moved
A restaurant company running a dozen-plus outlets divested a Tokyo grilled-fish specialty restaurant as part of "selection and concentration"; an experienced individual took it over in January 2024. Sales matched the financial statements from day one, but the one-month handover and insufficient equipment checks turned out to be miscalculations.
A 50-something engineer used his severance pay to buy 40+ vending machines: registered in January 2024, took over in August, targeting double the sales
Tsuneyuki Inoue, a 50-something manufacturing engineer in Yamagata, acquired a 40+ machine vending operation from Norikichi Honten in Niigata. He registered on an M&A site in January 2024, met in June, trained in July, and took over formally in August, funding it with his severance pay and aiming to double sales in two years. The transfer price wasn't disclosed.
Substack Writers at Work: Zero New Subscribers for 2 Years, Then 2,000 in 6 Months — Selling How to Teach Substack, at $200,000+ a Year
Bestselling author Sarah Fay's first newsletter went 2 years with zero new subscribers. One phone call turned that into 2,000 subscribers in 6 months, and she split that method into a 3-tier subscription, reaching over $200,000 (about ¥30 million) a year.
Lea, a Tool That Turns LINE Official Accounts Into E-Commerce Stores, Sold to a Buyer Found Through an Online Salon
Lea, an indie SaaS providing e-commerce features on top of LINE official accounts, was sold to INFLU Inc. in July 2022 (price undisclosed). The buyer was found through a paid online salon — a record of an unusual route: "walk into the place where the market is booming yourself."
¥10 Million in Cumulative Sales on Coconala Over 4 Years: A Video Creator's Pricing Strategy That Started with a ¥780 First Order
Video creator Matsuume Take started on Coconala in March 2021; his first order was a narration read-through netting ¥780. Over 4 years he reached ¥10 million in cumulative sales (just under ¥12 million as of November 2025). The turning points: specializing in video production and switching strategy from "more orders" to "higher prices."
Fully Booked VA: Selling an $180K/Year Course Business With No Down Payment — the Seller-Financing Record of 36 Monthly Installments of $5,000
Fully Booked VA, a virtual-assistant training course business with over 10,000 lifetime students, sold for $180,000 to business coach Stephanie Hayes when monthly revenue stood at about $15K. Payment was fully seller-financed: $5,000/month for 36 installments plus interest. This is the practical record of a "downhill exit," sold while revenue was already half its peak.
Fin vs Fin: Profit Down 75% After a Google Update, Still Sold for Seven Figures — a “Damaged Asset” Exit Strategy
Wellness-product comparison site Fin vs Fin grew to $1M in annual revenue and $70K in monthly profit, then saw organic traffic cut in half by Google's Helpful Content Update. Even so, armed with 300+ brand partnerships and its revenue data, it drew 10 LOIs and sold for seven figures — three times annual profit — holding the discount to just 15%.
10,000 Subscribers and ¥166,000 a Month on 1–2 Uploads per Month: Real Data From a Gadget YouTube Channel That Switched to "Quality Over Quantity"
Kurashiki Log, who runs a gadget and lifestyle channel as a side project, disclosed ad revenue of ¥165,945 at the 10,000-subscriber mark — on only 1–2 uploads per month. After two stagnant years, the pivot to "quality over quantity" accelerated growth from 4,000 to 10,000 subscribers in six months.
PDFShift: An HTML-to-PDF API at $8,500/Month — One Channel Ended a Two-Year Plateau; a $500K Sale Fell Through
A Paris-based solo developer's HTML-to-PDF conversion API earned $9 on day 20, reached 150 customers and $3,200/month by January 2020, and turned profitable that September. MRR flatlined for over two years starting September 2021, then returned to 8–9% monthly growth after resuming Google Ads, now at $8,500/month.
Extra Points: A Newsletter With 679 Paid Subscribers and $4,300/Month, Sold for “Cash + a Job + Equity” — Then Bought Back Three Years Later
Extra Points, a newsletter covering the business side of college sports, was sold to D1.ticker at the stage of 679 paid subscribers and roughly $4,300 in monthly revenue, for a package of cash + a writing job + equity (low six figures, about 2x ARR). Founder Matt Brown kept writing after the sale and bought the business back in 2024.
24 Udemy courses earning $1,500/month, $53,000 cumulative — the 3.5 years since switching to mass production once "$100 per course" became visible
A Udemy instructor with 24 courses earns about $1,500/month and $53,000 cumulative over 3.5 years, after shifting from hit-seeking to steady course production.
From selling 4 pieces for ¥2,400 to ¥200K-500K/month — the ¥600 price point an 8-year handmade artist walked away from
Handmade artist Uni sold ¥600 earrings that moved once every few days — 4 sold meant ¥2,400 total. Eight years in, she now earns ¥200,000-500,000+ a month, driven by repricing and a production workflow built to support higher prices.
Stella: MVP in 2 Days, $350K/Month in 2 Months — an AI App Built by a Solo Creator With 4 Million Followers
AI visualization app Stella hit $300K/month (about ¥45M) two months after launch and $350–360K by interview time, from a 2-day MVP. 12,000 paying customers and 200,000+ downloads. Building a distribution network of 1.2M on Instagram and 2.8M on TikTok before the product mattered.
¥50,000–70,000 a Month in Royalties From 24 Kindle Books: 16 Months of Real Data on "Volume-Production" Self-Publishing, ¥750,000 Cumulative
An author who published 24 books via Kindle self-publishing discloses actual royalties month by month. The first 3 months brought ¥5,000–14,000/month, month 6 crossed into the ¥50,000s, and it has held steady at ¥50,000–70,000/month since. The 16-month cumulative total exceeds ¥750,000 — a "diversified portfolio of books" earning ¥2,000–3,000 per title per month.
Earlyname: Six Rounds of Counteroffers That Turned a $4,500 Bid Into $10,500 — the Complete Record of Selling Small
Ben Stokes built Earlyname in three weeks, ran it for six months at $350/month in subscription revenue, and sold it on MicroAcquire for $10,500 — 30x monthly revenue. He published the entire negotiation, including all six rounds of emails that moved the buyer's opening bid of $4,500 up to $10,500.