Nathan Barry: The Failed $5,000 Challenge That Built a $33M-a-Year Email Business

Introduction

Nathan Barry's most famous business started as a public bet he lost. On December 31, 2012, the designer and self-published author announced the "Web App Challenge": build a web app to $5,000 in monthly recurring revenue within six months, using only $5,000 of his own money and 20 hours a week. He picked email marketing for creators — a market owned by Mailchimp — and built ConvertKit. Six months later, the app was stuck at roughly $2,100 a month. The challenge had failed, cleanly and in public.

Most founders would have taken the hint. Barry kept the product running on the side, watched it flatline, watched it fall further — to $1,330 a month by September 2014 — and then did the opposite of quitting. He asked himself two questions, put in $50,000 of his own savings, hired a full-time developer, and started doing the least scalable thing imaginable: emailing professional bloggers one by one and offering to move their entire email list over for free, by hand. Within a year, monthly revenue went from $2,000 to $100,000. By 2022, ConvertKit — rebranded as Kit in 2024 — was doing a reported $33.4 million in annual recurring revenue, still bootstrapped, still independent, after reportedly turning down an acquisition offer worth hundreds of millions.

The story is not really about email. It is about what to do when a reasonable bet fails: how to tell a dead project from a slow one, and what unglamorous work actually restarts growth.

The Story

Barry did not start as a software founder. He left a $63,000-a-year design job in 2011 and made his living as a creator: blogging, building an email list, and self-publishing books. His book Authority and related titles earned him more than $150,000 in under a year, by his own account — good money, but money capped by his own hours. Every sale was a one-time transaction, and every product needed a new launch. He wanted something that compounded, so he set himself the challenge: one web app, $5,000 of capital, 20 hours a week, six months to $5,000 a month.

The $5,000 cap was deliberate, not just frugal. Barry had watched creators pour windfall money from one success into the next project and never have to talk to customers, because the money removed the pressure. His rule forced the opposite: beyond the initial $5,000, the app had to be funded by customers, through pre-sales, which meant he had to talk to people and find out what they would actually pay for. He chose email for professional bloggers in the first week of the challenge, reasoning that creators were underserved by tools built for everyone.

Six months in, the honest result was about $2,100 in monthly revenue — less than half the goal. Barry has said he usually hits about 50% of the goals he sets himself, so the miss was on brand. But the harder truth was what came next: nothing. For more than a year after the challenge, ConvertKit basically stood still. It was not dying fast enough to kill and not growing fast enough to matter. Selling software subscriptions turned out to be a different animal from selling ebooks: an ebook buyer says yes once, but an email-tool buyer has to say yes to closing their Mailchimp account, migrating years of subscribers, and trusting a stranger with their livelihood.

By September 2014, monthly revenue had slipped to $1,330 — less than it cost to pay a single employee. Barry faced the decision every side-project founder eventually faces, and he made it with two questions instead of a spreadsheet: Do you still want this as much as you did when you started? And have you given it your best possible effort? His answer to the first was yes. His answer to the second was no — he had been splitting his attention across other projects. So he went all in: $50,000 of personal savings, his first full-time developer, and a decision to stop treating ConvertKit as a side project.

What he did next explains the whole company. Barry started doing direct sales himself — cold emails and Skype calls to professional bloggers with large lists — and discovered the real obstacle in those conversations. Bloggers liked ConvertKit, but switching email providers felt like moving house: export lists, rebuild automations, reformat templates, and risk breaking the thing that made them money. So Barry removed the obstacle by hand. He offered concierge migrations: his team would move a blogger's entire setup over, for free. At $50 a month per customer, he was effectively doing hours of skilled work for about $3 an hour, less than his old high-school job. It was absurd as a business model and perfect as a growth strategy, because every migration produced a customer who could never imagine going back — and who told other bloggers about it.

The second change was positioning. ConvertKit stopped being "email marketing for everyone" and became, in one sentence, "email marketing for professional bloggers." That single sentence did more than any feature: it told the right customer "this is for you" and told everyone else to look elsewhere. By March 2015, monthly revenue had climbed back to $5,020 — the goal from the original challenge, two years late. From there, direct sales and word of mouth carried it past $20,000 a month, and then the flywheel spun faster: affiliates and more than 150 free educational webinars replaced paid advertising, which a bootstrapped company could never have afforded against Mailchimp anyway.

Growth brought its own near-death moments. At one point the company scaled so fast it was left with only about $30,000 in the bank, and Barry responded by building toward a discipline the company still keeps: holding months of operating expenses in reserve and growing at a pace profits can fund. By 2018, Inc. magazine reported annual revenue of $9.5 million and ranked ConvertKit No. 72 on the Inc. 5000 list. The company also started operating with unusual transparency for a private firm — publishing its metrics and running itself, in Barry's phrase, like a publicly traded company without the stock ticker.

The numbers kept compounding: a reported $33.4 million in annual recurring revenue by 2022, tens of thousands of paying creators, and a platform that now powers audiences for names like Tim Ferriss and Pat Flynn. In 2024, Barry rebranded ConvertKit as Kit, positioning it as an email-first operating system for creators. Along the way, he reportedly turned down an acquisition offer worth hundreds of millions of dollars from Spotify, choosing to keep the company independent. Whether or not that number is exact, the direction is consistent with everything else in the story: Barry's goal was never an exit. It was a business he owned, that compounded, that did not need him to be interesting every day.

There is a coda that captures his philosophy better than any revenue chart. Barry likes to tell the story of Mark Sisson, whose paleo-friendly mayonnaise had just won a trial in a single Whole Foods store in Austin. Sisson emailed his subscribers within 50 miles of that store and asked a favor: go buy the product and send him a photo of it on the shelf. The product sold out, the trial expanded to five stores, then more — and two years later, Primal Kitchen sold to Kraft Heinz for a reported $200 million. Barry's point is that creators already own the most valuable asset in business — direct access to people who trust them — and most of them point it at the lowest-leverage outcomes: a one-time ebook, an affiliate link, a sponsored post. ConvertKit exists to point it at something that compounds.

Lessons

Nathan Barry's run offers three mechanics worth stealing:

1. Cap the bet, then decide with two questions, not sunk cost: The Web App Challenge worked as a decision tool precisely because it had hard edges: $5,000, 20 hours a week, six months, $5,000 a month. When the deadline passed, Barry did not ask "how much have I spent?" — he asked two questions: "Do I still want this as much as I did at the start?" and "Have I given it my best possible effort?" If the answer to the first is no, quit. If the answer to the second is no, you have not earned the right to quit yet — go all in for a defined period and then ask again. The mechanism for your own stalled project: write down the budget, the hours, and the deadline before you start; when the deadline arrives, answer the two questions in writing. Most founders either quit too early (the effort question is still no) or never quit at all (the want question has been no for a year). The two questions separate those two failures.

2. Do the customer's hardest job for free, until it stops being necessary: Concierge migration was not a feature; it was Barry absorbing his customer's biggest cost — the switching effort — with his own hands. The mechanism: find the single step your best prospects keep naming as the reason they will not switch, and do that step for them, personally, for your first 20 to 50 customers, even at an absurd effective hourly rate. Track two things: how many of those customers stay after 90 days, and how many refer someone else. If both are high, the unscalable work was not a cost — it was your moat, because competitors will not do it. Stop doing it by hand only when the volume forces you to systematize it, and turn the process into a product feature (templates, importers, a migration team) rather than dropping it. Barry's version scaled from his own hands to a standing offer, and that offer is still the reason creators switch.

3. Write one sentence that repels the wrong customer: "Email marketing for professional bloggers" is seven words, and it did more for ConvertKit than any feature release. The mechanism: write the sentence as "[Product] for [specific person] who [specific situation]" and test it against real prospects — the right ones should immediately recognize themselves, and the wrong ones should immediately self-select out. If everyone nods politely, the sentence is too broad. Then let the sentence drive decisions: features that serve that person get built, features for everyone else get declined, and marketing speaks to that person's problem, not to the market. Barry paired this with a second discipline — building in public through transparent metrics and teaching (150-plus webinars, affiliate partners who were actual users) instead of paid ads. Narrow positioning plus visible teaching is the bootstrapped alternative to an ad budget: the sentence finds the audience, and the teaching earns their trust before they pay.

Closing

Nathan Barry failed his own challenge in public, watched his company flatline for a year, and then answered two honest questions and bet his last $50,000 on the unglamorous work of moving other people's email lists by hand. The $33 million that followed was not a reward for a brilliant idea — email marketing was a crowded market in 2013 and it is a crowded market now. It was the compound interest on a narrower bet: one kind of customer, one sentence describing them, and a willingness to do the work that does not scale until it does. His challenge failed on schedule. His company succeeded on the same logic — a capped bet, an honest answer, and then the whole weight of his effort behind it. That is a playbook any solo founder can copy, and unlike most overnight successes, it comes with the receipts: the failure was public first.