ZeroEntropy: Revenue, sale and how it was built

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.

Solo founder · 2 months after launch, revenue flat

AI coding agents can build a working page or deck, but in the founder's words their visual output often looks generic. Skillry sells finished visual styles, one task per Skill, shows real output before the sale, and adds new Skills almost every day under one subscription. When sales began on 28 September 2026, they held at about US$430 a day for 17 days.

Solo founder · 12 months after launch, revenue falling

It launched in October 2025, when Anthropic's Claude Code had made skills, slash commands and subagents a normal way to steer a coding agent, and when most developers were still writing their own. A founder who presents themself as a CTO with 18 years of experience sold a tested set as a one-time purchase with a money-back promise. Verified revenue reached US$16,040 in March 2026 and US$82,195 in total, but it fell to under US$2,000 a month by September 2026.

Solo founder · 4 months after launch, revenue falling

Said over US$36K in a monthRecords US$39.6K by end of JulyHeld

It turned a new working habit, running several AI coding agents at the same time, into a native Mac app with voice control and a strong visual style, and it charged once instead of every month. The founder sold it to his own audience through daily live streams, X and a Discord community. Stripe recorded more than three quarters of the revenue in the first seven weeks.

Solo founder · 6 months after launch, revenue growing

The compression engine already existed as a free, open-source Python tool, but it was hard to install. Garm Lucassen packaged it into a desktop app that installs with a double click, connects the coding agents by itself and removes its changes when it quits. The engine's creator suggested that he build it and keep the Headroom name. Developers who hit the usage limits of their AI plans pay a small monthly price to make those limits last longer.

Solo founder · 8 months after launch, revenue flat

AI agents that run for hours or days need an address that people can write back to, and a normal personal mailbox needs a browser login and OAuth consent screens that a program cannot click through. Robotomail sells a mailbox that a program can create and read without a person. It started in March 2026 and connects to Claude, Codex, Cursor and other agents through MCP, an API or a command-line program.

Solo founder · 12 months after launch, revenue growing

Help articles go stale every time a software team ships, and small teams have nobody to keep them current. The founder had built a large audience at his first company, Senja, and used it to sell preorders before the product existed. He then launched new features every week and turned each one into posts, videos and sales conversations.

Team of 2 to 10 · 16 months after launch, revenue growing

Every team that builds with AI models ends up with several provider accounts, keys, invoices and SDKs. One gateway with open code replaces them, and a developer can read the code before sending traffic through the hosted version. In 2026 the founders added DevPass, a flat monthly price for coding agents with an allowance of up to three times the price in model usage. The verified monthly receipts grew from US$57,994 in January 2026 to US$249,922 in August 2026; TrustMRR does not split them by product.

Team of 2 to 10 · 20 months after launch, revenue flat

Large online groups get the same questions again and again, in many languages, and scam messages arrive at hours when no moderator is awake. C12s answers from the project's own documents and deletes the scams, so a small moderator team can cover the whole day. Its blog and FAQ name Web3 projects and gaming groups as typical users, and its developer, the Lisbon IT firm Momentum One, already sold Discord set-up and moderation services to such projects.

Solo founder · 9 months after launch

In 2026 many developers used several AI agents at once, and each agent needed its own sign-in to every service. The launch post names three problems: each agent wants its own OAuth sign-in, most connectors allow one account per service, and an agent that holds a token can do anything the token allows. Executor moves the accounts and the permission rules out of the agents into one place.

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.

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.