DealStack.ai: Product, team and how it was built

Solo founder · sold 17 months after launch

It solved one narrow and repeated task that every company has at the end of each quarter: find all invoices and give them to the accountant. It read the invoices where they already were, in the inbox and on supplier websites, instead of asking people to forward them, and it let customers write their own checking rules in plain language. Stripe data shows monthly revenue rising from US$12,631 in November 2025 to US$18,970 in January 2026.

Team of 2 to 10 · 33 months after launch, revenue falling

The product goes where the customers already are: a shop owner does not install a new app or learn accounting software, but writes into a chat. The founder wrote of having worked as a data scientist at a microloan company and of running a café, so the founder knew both the bookkeeping problem and the reason banks ask for records.

Solo founder · 19 months after launch, revenue growing

The founder, a digital nomad, had collected more than 1,000 receipts from many countries to track his own spending, and built the app for that use. It reads every line item instead of only the total, which matters for travellers with receipts in foreign scripts and currencies. Small, steady releases (25 versions between 21 January and late October 2026) and a translation of the app into 52 languages widened the market without a team.

Team of 2 to 10 · 24 months after launch

It picked work that large regulated companies had failed to automate for years and that tolerates almost no errors. Instead of letting a model decide each step, it turns the expert's procedure into fixed program steps, which makes the result predictable and cheap to run. A few large customers, sold directly, can pay for a very small team.

Started small, grew after funding · 25 months after launch, revenue growing

Every GmbH and UG in Germany must keep books, file VAT returns and produce annual accounts, and most pay a tax adviser's office to do it, the company's press release says. mika puts AI on the routine part, keeps people on the checking, and sells it as a monthly subscription that the price page lists from €49 net. It chose one narrow customer, the small limited company without its own finance staff, and the customer count grew from about 400 at the start of 2026 to more than 750 in September 2026, the company said.

Team of 2 to 10 · 7 months after launch

Chasing late invoices is repetitive work that finance teams do by hand in spreadsheets and email. Cleavr connects to tools that companies already use, such as Pennylane, Stripe and SAP, so a customer can start without a migration, and the company says setup takes under a day.

Solo founder · 7 months after launch, revenue growing

It went where the users already were: an app in ChatGPT's app store, a plugin in Claude's directory and in Claude Code, and setups for Cursor and Codex, in the months when these directories were new. It charges per tool call instead of a share of ad spend, so a small advertiser starts at US$49 a month. And it applied to the platforms' own API programs; the company says Google approved it in June 2026 and Amazon admitted it to its partner network.

Team of 2 to 10 · 27 months after launch, revenue falling

Many experts know that regular LinkedIn posts bring clients, but they do not have the time or the writing habit. UpLinked sells one narrow job, about one hour a week of LinkedIn posting for business-to-business experts, first in Dutch and later in English. Coaches and consultants who teach LinkedIn used it themselves and for their own clients, and the sellers wrote that this word of mouth brought every customer, with no paid ads. TrustMRR recorded US$200,908 of Stripe payments to the founding company up to October 2026. Monthly revenue fell by more than half in 2026, the business was listed for sale, and since late October 2026 another company is named as its operator.

Team of 2 to 10 · 26 months after launch, revenue falling

Many people own enough clothes and still do not know what to wear, and a screenshot of a look they like does not tell them how it would look on them or what in their closet goes with it. Aesty answers both questions with image models from OpenAI and Google, and sells the answer by the week, the month or the year. TrustMRR, reading the company's RevenueCat account, showed US$67,971 of revenue in total and US$10,064 of monthly recurring revenue from 688 subscriptions at the last sync on 22 September 2026.

Team of 2 to 10 · 17 months after launch, revenue falling

The team says that people in real meetings do not like a translator that speaks for them, so Deeptrue mainly prompts the user to speak for themselves. It works with any meeting app through a virtual microphone instead of a bot that joins the call, and it rents speech, language and voice models by the minute, so a small team can sell it with metered plans.