Who we feature
The people behind the numbers. Every founder we've sat down with, and the stories they told us straight.
Mailchimp hit about $800M in revenue with zero venture capital, sold to Intuit for roughly $12B in 2021, and in May 2026 Intuit confirmed its revenue is now declining. A source-typed ledger, and what actually transfers.
In 2026, the fastest way to lose your biggest customer is a backup you never tested. A composite founder diary about the night a botched production migration erased roughly 22 hours of customer data at $40K MRR, when the newer backup had been failing silently for months and the freshest clean copy was almost a day old. It covers what was lost, the email that had to go out, the agency that churned, and the restore-drill and point-in-time-recovery changes that cut the recovery point objective from about a day to five minutes.
Craigslist has never disclosed its finances, so every revenue figure is an estimate. The famous $694M stat is a frozen 2018 peak; AIM Group data shows it has fallen to about $302M by 2024. Here is the sourced ledger and the operator lesson.
In 2026, one four-sentence email can undo a year of growth. A composite founder diary about the month a core integration partner raised its API price roughly 10x and gutted its free tier overnight at $46K MRR, echoing the real 2023 Reddit and Twitter/X API shocks: the triage, the customer email, and the re-architecture that cut our single-vendor dependency.
Midjourney has never disclosed revenue, so 2026 estimates run from $150M to $500M ARR. Here is the sourced ledger, the pricing math, and the number that actually holds.
At $42K MRR I finally added up what an AppSumo lifetime deal I ran years earlier was really costing me: about 1,150 active lifetime accounts paying $0 a month while eating support and server costs. A 2026 founder diary on the long tail of a lifetime deal, and how I cleaned it up.
Obsidian has never disclosed revenue, so 2026 estimates run from about $2M to $25M. Here is the sourced ledger, the pricing math, and the number that holds.
At $38K MRR my revenue looked healthy, but my gross margin was only about 62%, well under the 75% SaaS benchmark, mostly because of AI feature costs. Here is the month of margin surgery that took it to 76% without touching what customers valued.
Lemon Squeezy hit $1M ARR in nine months, turned down a $50M Series A, then sold to Stripe for an undisclosed sum. An honest, source-typed revenue ledger, and why the disclosed number is the least interesting part.
At $36K MRR I realized one customer was nearly 40% of my revenue. Why single-customer concentration is dangerous even when they stay, and the boring playbook that cut it to under 30%.
ClickFunnels revenue peaked at a reported $265.3M in 2023, then fell to about $170M in 2024. An honest, source-typed ledger, plus the raise it never announced.
At $34K MRR, running solo, a 214-question security questionnaire and a SOC 2 ask nearly froze my biggest deal. The interim packet that closed it, and what it really cost.
Calendly is private and stopped confirming its revenue, so third-party estimates now range from about $70M to $349M. Here is the source-typed ledger, the bootstrapped-then-$3B-raise story, and what actually transfers to operators.
At $33K MRR an agency offered to white-label and resell my product, projecting twelve to fifteen thousand in new MRR. A composite founder diary on why I said no, the discount math the pitch hid, and the referral deal I offered instead.
PostHog publishes its salaries, strategy, and board decks, yet keeps its revenue deliberately vague. The company says 'low $10s of millions'; analyst Sacra estimates ~$57.5M ARR (Feb 2026); Stripe says 'on pace for $100M.' A sourced, typed ledger of what PostHog actually earns, and why the most open company in dev tools blurs its own top line.
At $31K MRR I stopped burying cancellation and stopped fighting refunds. The chargebacks that friction was quietly manufacturing fell away, and MRR kept climbing.
Zapier's revenue is estimated near $310 million a year, reached on a single $1.2 to $1.4 million seed and profitability since 2014, then valued at $5 billion via a secondary sale. A source-typed ledger of what is confirmed, what is estimated, and what transfers.
At $10K MRR my growth stalled, and it was not the top of the funnel. Only about 22% of new signups ever reached value. A composite founder diary on rewriting onboarding around one activation milestone, and the eight weeks that followed.
Zoho crossed about Rs 12,313 crore (roughly $1.4 billion) in FY25 revenue, up 17.8%, having never raised a cent of venture capital. A source-typed ledger of how, and what actually transfers.
At $27K MRR one account offered $45,000 for a custom build plus $3,000 a month, if I would build a bespoke module only they would use. A composite founder diary on why I said no, the arithmetic that changed my mind, and the roadmap test I use now.
Todoist has crossed $100M in cumulative revenue, fully bootstrapped, and its founder says the number is the boring part. A dated, source-typed revenue ledger for Doist, and what actually transfers from a 17-year customer-funded climb.
The month I crossed $23K MRR, a card-testing attack slipped a few hundred fraudulent charges past my checkout. Weeks later the disputes rolled in, my dispute rate crossed 0.75%, and my processor froze payouts. A composite founder diary on chargebacks, watchlists, and frozen cash.
Ahrefs is a fully bootstrapped, nine-figure SEO business, but it has never published an official revenue figure. The one hard number it let slip, ~$257M, and the operator lesson behind it.
The month I crossed $26K MRR, my Firebase bill jumped almost six times with no new growth. A composite founder diary on Firestore read costs, migrating the hot paths to Postgres, and why the pattern, not the tool, was the real problem.
Buttondown's founder Justin Duke is radically transparent about growth and profitability, but stopped publishing his revenue. The best estimate is roughly $392K a year and rising 61%. Inside the bootstrapped newsletter tool that hides its own number.
Everyone asked for it. Almost nobody used it. The month I reached $14K MRR, I killed the most-requested feature on my roadmap and learned the difference between what customers ask for and what they actually use.
Simple Analytics never took a cent of funding and grew almost entirely by word of mouth. The dated ledger runs from $30K ARR in 2019 to a ~$500K/year third-party estimate in 2026. The number is real. The lesson underneath it is slower than it looks.
By the numbers it was my best month ever. By the way it felt, it was the month the job stopped being building and started being answering. A support-overwhelm diary at $25K MRR.
Fathom Analytics has never published its revenue, on purpose. The only figure in circulation is a third-party estimate of $5M to $10M ARR. Inside the privacy company that keeps its own numbers private.
Baremetrics made its revenue public for years, then sold to Xenon Partners for $4M cash in 2020. The real numbers behind the exit, and why the transparency pioneer walked away.
I hired my first employee at $9,000 MRR and it was the best decision I had made, until revenue slid from a $27K peak back to $22K and a fixed salary became a slow leak. A 2026 diary on the math I avoided, why I waited four months too long, and how to do a first layoff with decency.
Balsamiq's founder publishes exact revenue every year: $6.58M in 2024, down on purpose. The real number, the 2008 arc, and why data brokers get it wrong.
A solo founder pours three months into a version 2 and a Product Hunt launch at $13K MRR, and it moves revenue by about $190. The real story is the month after, and what actually grew the business.
Carrd founder AJ confirmed about $100K MRR and $1.2M ARR on The SaaS Podcast, then went quiet. The real revenue number, the $2M raise he took anyway, and why a $19-per-year, one-person business staying flat is the whole point.
The month my SaaS hit $21,000 MRR I signed my first enterprise deal: one $40,000-a-year contract worth 16% of my revenue. A first-person 2026 diary on the 280-question security review, the SSO build I pulled off the roadmap, net-60 cash delays, concentration risk, and the three rules I wrote afterward.
beehiiv is cited at around $30M in annual revenue for 2026, but founder Tyler Denk's own numbers show only ~$20M is recurring software, with ~$10M from ads and a marketplace. Here is what the figure actually counts, the growth curve, the venture backing behind it, and the operator lesson.
The month I finally quit my day job my SaaS read $11,200 MRR. A first-person 2026 diary on the number that actually let me leave (it was not the gross one), the test I used before giving notice, the runway math, and why my first full-time month grew slower, not faster.
Hypefury, the bootstrapped X (Twitter) growth tool by Samy Dindane and Yannick Veys, rode from about $300/mo to a $20K MRR peak, then publicly posted that revenue was declining. Third-party trackers now estimate roughly $567K ARR by 2024. The real lesson sits next to the number.
Third-party trackers peg Transistor.fm at roughly $4.5M ARR. The founders only ever confirmed the milestones: $1,400 in month one to "millions in ARR." The real story is the 50/50, no-VC structure two people chose on purpose.
A competitor cloned my SaaS the month it hit $30K MRR. The real 90-day revenue ledger, what the lawyer said, the three weeks I wasted, and the moat a copy cannot take.
Ghost publishes its finances live: $10.8M ARR, $907K MRR, 3.05% churn, 30,441 customers. The real story is not the number. It is the non-profit structure that means the company can never be sold.
The month my SaaS crossed $4,300 MRR I was finally ramen profitable. A first-person 2026 diary on what actually cleared my account after fees and tax, why the milestone felt smaller than the fantasy, and the checklist I use now.
Plausible crossed $1M ARR in 2022 from $64 MRR in 2019, bootstrapped and profitable. The real growth lever was not privacy. It was hiring a distribution co-founder.
One acquired customer walked out with almost a third of my $24K MRR in a single month. A first-person 2026 diary on customer concentration risk, the cashflow scramble, and the concentration cap I live by now.
A bootstrapped founder removed a freemium tier at about $16,200 MRR in 2026. The honest 90-day ledger: signups halved, support fell ~38%, and MRR grew ~21%.
The month the chart was green and she was not. A solo founder's diary of burning out at $15,000 MRR in 2026, and the five boring boundaries that pulled her back without crashing the numbers.
A bootstrapped founder's MRR chart went flat at $28K. It was not a retention problem. It was involuntary churn, the revenue that leaks out when cards fail and no one notices. Here is the ledger, and the boring fixes that recovered two thirds of it.
A bootstrapped founder's honest ledger to her first $1,000/month in 2026: 35 customers at $29, why she waited too long to charge, and why ads returned almost nothing.
A bootstrapped founder raised prices at ~$18k MRR in 2026. The real 90-day ledger: who churned, who stayed, and the segmented plan that lifted MRR 16%.
My SaaS MRR climbed 27 percent in a quarter while gross churn quietly doubled and net revenue retention slid below 100 percent. A first-person 2026 diary on catching the leak.
ConvertKit was three months from dying at $1,337/mo. The bootstrapped playbook Nathan Barry used to reach $29M ARR, every figure sourced.
Everyone copies Justin Welsh's audience. The number that actually explains his one-person business is the margin.
As of 2026, Gumroad's own revenue was about $21 million in 2023 with roughly $9 million in profit, up from $11 million in 2022 (Sacra estimates). The twist in the Gumroad revenue story: the company Sahil Lavingia publicly called a failure in 2019 became quietly, durably profitable, while the eye-catching $142 million figure is what creators earned on the platform, not what Gumroad made.
One person, no team, no VC, no exits, and about $3.1 million a year. The sourced numbers behind Pieter Levels' portfolio, and the never-sell structure that compounds them.
Arvid Kahl now teaches audience first, but FeedbackPanda hit $55K MRR in two years with no personal audience. Here is what actually drove the growth.
HeadshotPro is cited everywhere as a $300K-a-month solo business. Danny Postma stopped sharing revenue in 2023. Here is what is actually sourced, and what it teaches operators.
Bannerbear's first eight months earned about $400 a month. It took 16 months to reach $10K MRR and a patient year of technical tutorials to reach $27K. The real lesson of Bannerbear's revenue is the shape of the curve, not its size.
Testimonial.to revenue hit $800K ARR bootstrapped by one founder, out-earning his AI product PDF.ai four to one. Damon Chen's real numbers, and the lesson for 2026.
Tally reached $4.3M ARR in 2025, bootstrapped, by giving unlimited forms away free and charging just 2% of users. Why free is the growth engine, not the discount.
Marc Lou launched about twenty startups that mostly failed, then built ShipFast in a week and made $6,000 in 48 hours. A sourced look at how a Next.js boilerplate outearned everything he built for end users.
TypingMind launched five days after OpenAI opened the ChatGPT API and crossed $500,000 in revenue within a year. Here is what solo operators can copy from Tony Dinh's build-in-public playbook.
Naomi Tate built a quiet $7,400 MRR tool for solo bookkeepers, no paid ads, in 18 months. In June 2026 she sent the wind-down email. Not because she failed. Because her infra bill, her toddler, and her own client roster all added up to a different answer than the spreadsheet she started with.
A composite vertical-SaaS founder hit $9,120 MRR running entirely on four AI agents, then made her first paid hire in March 2026, not a developer, an operations contractor at $22/hr through Deel. The 60-day result: NPS +14, churn -1.2 pp, founder hours -11/wk. With the math, the agent she retired, and what she'd do the same.
Inés Vargas, a solo founder in Bilbao, hit 100 paying customers in 90 days for $1,470 in total spend. The itemized cost breakdown, the LinkedIn voice-DM channel that beat cold email 27x, the pricing flip at customer 38, and the channel she'd skip if starting again. Told as told to Joaquín del Río, with the spreadsheet on the table.
Marta del Sol runs a one-person operations studio from Valencia and crossed $4,120 in MRR across nine clients, with three AI agents doing the delivery and a $612 monthly software bill. Here's the real arc: the underpricing she's embarrassed by, the month two clients churned at once, why her clients renew for the Friday report and not the robot, and the caveats she insisted we print next to every number.
Cadence reached $12,400 in MRR with 140 accounts and an up-and-to-the-right graph, then the founders shut it down on purpose. This is the post-mortem of the most dangerous number in startups: too much to walk away from, too little to live on. The retention they didn't track, the customer they optimized for and shouldn't have, the fork they took too late, and the unusually honest way they ended it.
Tomás Iglesias turned six years of hourly freelancing into a productized service business doing $51K MRR with a team of five, and his hours dropped from 60+ to 45 a week while revenue doubled. A real Tuesday, with the numbers: the utilization metric he checks before coffee, the $28K over-hiring scare, why he still does every sales call himself, and the $13K of actual monthly profit hiding behind the headline.
The app worked. The demo hit 140,000 views and 412 people signed up on launch day. Ninety days later: 11 paying users, ~$209 MRR, and an $8,000 monthly burn. This is the boring middle where AI products actually die: the retention cliff the launch hid, the month spent building the wrong thing, the five user calls that came too late, and the specific trap of an AI demo that's too good to be true.
The two people who ask the questions and write them up.
Interviewer at OperatorBook. Sits founders down and asks the awkward question about the numbers, then prints the answer.
Narrative writer at OperatorBook. Turns spreadsheets and Slack logs into stories you actually finish.
