YourCoverLetter: Revenue, sale and how it was built

Solo founder · 9 months after launch, revenue falling

It sells one small result at a small one-time price: the first diagnosis is free, and the full analysis costs R$19.90 in Brazil or US$3.90 abroad, with no subscription. It takes Pix, the Brazilian instant-payment system, which most of its buyers use. A solo founder with an audience on X could launch it in days, and Stripe shows US$1,868 in the first full month.

Team of 2 to 10 · 36 months after launch, revenue growing

Many European employers, schools and public bodies ask for a CV in the Europass layout, and many applicants write it in a second language. Europass AI aims at one narrow group, skilled workers in construction, manufacturing and trades who apply across Europe, and lets an AI model write the text in the language they choose.

Solo founder · 19 months after launch, revenue growing

A job seeker needs a good resume for a few weeks, not for years. Rezly lets them start for free with no sign-up and then sells a short pass at the moment they want to download more than one PDF. The AI writing comes from OpenAI by the request, so one founder can offer the same tool in many languages.

Solo founder · 1 months after launch

Job seekers keep resumes, postings, reminders and interview notes in many tabs and files. Resumeaze puts the steps from the posting to the offer in one place and says that its AI keeps the user's facts. It is very new: the first verified payment came on 28 October 2026, and TrustMRR shows US$1.50 in total revenue on 3 November 2026. This page records a business at its first payment, not a proven one.

Team of 2 to 10 · 8 months after launch, revenue falling

Filling in the same facts on every employer's application form, and rewriting a resume for every job, is the slowest part of a job search for students and new graduates. The founder had already built a growth system for her first app: hundreds of paid short-video creators trained with her own course. She moved the same system to a job app, aimed at college students and recent graduates, who she says have more buying power than her beauty app's users.

Team of 2 to 10 · 7 months after launch

The founder had answered resume questions on Reddit for six years, and his free template had millions of users, so the AI tool launched to people who already trusted his format. It replaced a US$400 one-to-one review with a US$99 product that costs little to run.

Solo founder · 38 months after launch, revenue falling

It launched in March 2022, eight months before OpenAI released ChatGPT, and sold GPT-3 text through fixed templates for a monthly fee. A third-party report gives US$14,000 of monthly recurring revenue at its best and US$9,500 by May 2025. In 2026 the founder's own profile listed it at US$4,000, beside his much larger AutoShorts.ai.

Team of 2 to 10 · sold 19 months after launch

The founder built it in about three days to remove the part of blogging he hated, keyword research and content planning. Then he took partners, SEO people who had the audience he did not have, and they promoted it. Revenue reached US$7,000 to US$8,000 a month about eight months after the launch, and he sold the product after he had stopped working on it.

Solo founder · sold 5 months after launch

It launched in the month that AI models became good enough to write a whole app. It sold to people who cannot program, it charged from day one, and it was sold to a company that already had millions of customers.

Started small, grew after funding · 26 months after launch, revenue growing

Three founders treated each app as an experiment in pricing and paywalls. Lessons from Pixi, the first app, went into Cue. The studio rents the models, does not train them, and spends its effort on design, data and paid user acquisition, which its founders call the three Ds.

Team of 2 to 10 · 32 months after launch, revenue falling

It sold one promise that a customer can measure: a first reply to every new lead within 10 seconds, to businesses that already pay for many leads through Meta ads. A demo on the website brought sales calls through organic search before the product was built. Revenue then fell from US$9,000 to US$12,000 a month in late 2025 to under US$2,000 in September 2026, in the same months in which the founder launched other products.

Team of 2 to 10 · 2 months after launch, revenue growing

xAI released Grok Bot, a messaging app of AI agents, in beta on 11 August 2026. The two founders published their own open version about two hours later, under the name OpenGrokBot, and pitched it to people who wanted the same idea on Claude or Codex instead of Grok. Payment records show the first payment on 27 September 2026 and US$5,503 in the 30 days to 25 October 2026.

Solo founder · 31 months after launch, revenue growing

It shipped five days after the ChatGPT API appeared, when the official interface logged people out, typed slowly and had no search. It charged from the first day and raised the price with every update. Then a Team version for companies turned one-time sales into subscriptions.

Solo founder · 33 months after launch, revenue growing

It was built in two to three weeks as a side feature for an existing product and launched with a paywall on day one, one month after the ChatGPT API appeared. It reached US$10,000 a month in 25 days, then lost half of it to churn. What kept it alive for three years was cheap customer acquisition: more than 50 free web tools that rank on Google and send visitors to the paid product.

Started small, grew after funding · sold 11 months after launch

Its founders wrote some of the methods that the industry already used to run models cheaply, such as AWQ for 4-bit weights. They turned that research into a paid serving API, proved the speed on a public benchmark, and partnered with a cloud company that needed exactly that speed. Eleven months after its first public post, the partner agreed to buy it.

Team of 2 to 10 · sold 17 months after launch

Four founders, two of whom had built the drinks-delivery start-up Winelivery, looked for a profession that works with a large, fast-changing body of rules and had not yet adopted AI, and chose Italian accountants and labour consultants. They tested a first version with practitioners and sold monthly subscriptions. In October 2025 TeamSystem, an Italian maker of software for accountants, bought the majority of the company; its press release said Normo.ai had €1.3 million of revenue in 2025.

Solo founder · sold 5 months after launch

Its result is a before-and-after picture of the user's own face, which a short video shows in seconds. The founder chose TikTok as the channel before he built the app, then tripled revenue from almost the same installs by moving and testing the paywall with Adapty.