Fenestra: Product, team and how it was built

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

It serves one profession with one narrow need: a client-ready picture of a design that is already modeled, without a GPU workstation or a rendering agency. Its payment processor says that the conversion rate doubled when the company changed to a checkout that worked for buyers outside India, and that paying customers came from more than 150 countries. Prices were cut from US$49 for 100 renders in August 2025 to US$9 to US$19 for a starter pack.

Solo founder · 37 months after launch, revenue flat

For two years it was a powerful node editor that architects did not want, and it made about US$150 a month. The founder replaced it with a chat box where you say what you want, and changed one-time payments to subscriptions. Stripe revenue then grew 5.3 times from November 2025 to March 2026. His salary paid for the slow years.

Solo founder · 11 months after launch, revenue falling

The founder runs an architectural visualization studio, so he built modules for the jobs that studio clients pay for, not one general image generator. Each module keeps the geometry of the building and chooses a model for its task, and plugins bring the tool inside the design software that architects already use.

Team of 2 to 10 · 13 months after launch, revenue falling

A redesign picture of one's own room used to need an interior designer or hours of 3D software. Image-editing models offered as hosted services now make one in seconds, so a single developer could wrap such a model in a simple app and sell it as a subscription. The RevenueCat account that TrustMRR reads shows US$63,524 in the twelve months to 25 October 2026, with a best month in April 2026 and a steady fall since.

Team of 2 to 10 · 42 months after launch, revenue falling

The founders already had a paying mood board tool for interior design when image models became usable in 2023. They added AI mood board generation in April 2023 and AI room redesign later, and by May 2024 they ran it on an exact-match domain, myroomdesigner.ai. Revenue read from Stripe was US$39,262 in the last 12 months to 25 October 2026, but it is falling: September 2026 was 67% below November 2025.

Team of 2 to 10 · 14 months after launch, revenue falling

It picked one narrow market, Florida brokerages and condominium associations, where the work is reading long documents and keeping dates, and built the forms and deadlines of that market into the product. The money comes from very few customers: TrustMRR shows one active subscription at US$895 a month, plus four larger payments from January to April 2026 that make up almost half of all revenue.

Solo founder · 11 months after launch, revenue falling

It named a problem that many builders saw in 2025 and 2026: screens written by AI coding tools look alike. It sold the fix inside those tools, as an MCP server for Claude Code, Cursor and other coding agents, first published on 29 March 2026. Stripe revenue in April was 12.2 times March. Since April revenue has fallen, and September was 37.2% below it.

Solo founder · 35 months after launch, revenue falling

It reached people inside the chat app that they already open all day, so capturing an idea on a phone took one voice note. It aimed first at Notion users, whom the company told that ideas get lost on the phone. Ads on Facebook and Google then paid for fast growth in early 2026, until the founder stopped them in August 2026 because the costs were larger than the revenue.

Solo founder · 8 months after launch, revenue growing

Writers who cannot draw had no fast way to see their story as a comic. TabStory puts several image models behind one comic workflow with storyboards and character consistency, and sells credits by usage. Stripe-verified revenue grew from US$495 in May 2026 to US$12,143 in October 2026.

Solo founder · 6 months after launch, revenue falling

The founder was a LinkedIn ghostwriter with about 44,000 followers and a newsletter of about 17,000 readers, so he sold to an audience that already read him. He built the product around the interview that he used to do by hand for clients, instead of a text box that asks a model to write. The verified revenue grew from US$574 in April 2026 to US$19,343 in September 2026.

Team of 2 to 10 · 4 months after launch

The founders had worked inside healthcare billing before, so they knew that insurance follow-up calls are a large, repetitive and expensive part of the work. A voice model can now hold this kind of short, scripted business conversation. The company sells to health systems and billing firms through pilots, and the founders said in November 2025 that every pilot had become a paying customer.

Team of 2 to 10 · 3 months after launch

It is built for one kind of legal work, litigation, by a co-founder who practiced it. General AI chat tools have produced invented case citations that courts have punished, and Litmas AI sells a check of every citation against real court opinions as its main feature. The company stated that its demand came mainly from inbound marketing, and it priced per case so that small and contingency-fee firms can start small.

Solo founder · 7 months after launch

Designers often want a second opinion before a client review and have no colleague to ask. The maker is a product designer with more than 25 years of UX work, so the critique format follows how a senior designer reviews work: name what is unclear, then give three concrete changes. The first three critiques are free, and a subscription is needed after that.

Team of 2 to 10 · 7 months after launch

The founder, a lawyer who teaches negotiation, said that mediation works but is expensive and tied to office hours and calendars. Adri lets both sides answer at different times, and it makes the first proposal itself. The company then moved its focus from consumers to mediation providers that want a cheap first step for small disputes.