What didn't work

ConstructAI built software to turn structural drawings into Revit models. Co-founder Pedro Neira published a post-mortem on 29 Sep 2026. He wrote that he used his own memory and records, not a payment feed. In that account, the company started in May 2025, ran about 17 months, and in September 2026 ran out of funds before a pre-seed round closed.

He also wrote that enterprise sales took longer than the team expected: an NDA could take over a month, then commercial terms, legal review, and a security check. He put the cycle at 6–12 months. Two LinkedIn demos drew inbound interest, including from large companies, while the product was still unfinished.

Luca was an AI running coach on WhatsApp. Carlos Arboleya and Carlos Saro, the two founders, wrote on 29 Oct 2025 that they had shut the company down the week before. They say it was just the two of them.

In that post they put the peak at $100k a year, which they also write as €7.5k a month, reached in four months. They then describe six months without growth, a declining monthly figure, and no cash left. The post does not give the final month’s number.

Hyperlint was a GitHub app that reviewed documentation changes, including with style rules and some automations. On 20 Sep 2025 the founder posted that he was shutting it down and would open-source the tool instead of keeping the paid product. He describes himself as a solopreneur after a short co-founder trial.

He writes that he got past $10k a year reasonably quickly, and that he was closing with about 200 installations and over 10k repositories monitored. He says the buyer, technical writers, often had no budget, and that general coding tools were getting close enough that the product no longer needed to sit in the middle.

Olympia was an app that offered role-based AI assistants in a shared workspace. On 21 Aug 2025, technical founder Obie Fernandez published a wind-down note. He wrote that on 7 Aug 2025 he began a 45-day close: auto-renewals off, new charges paused, export tools, then accounts closed.

He gives this revenue path in his own words: the product peaked around $7.4k a month in May 2024, then slid toward about $1.9k by mid-2025. He says discovery moved inside larger platforms once they shipped “build your own assistant.”

Humane sold the Ai Pin, a wearable that answered through the company’s cloud. On 18 Feb 2025, HP announced a definitive agreement to buy Humane’s Cosmos platform, technical staff, and intellectual property, including more than 300 patents and applications. The price in HP’s release is $116 million, expected to close at the end of that month. Humane’s co-founders are quoted in the same release.

Humane’s own customer FAQ says new Ai Pin sales stopped immediately, and that on 28 Feb 2025 at 12:00pm PST the devices would no longer connect to Humane’s servers. Calls, messages, AI replies, and cloud access would stop. Offline items such as a battery reading could remain.

Kite was an AI assistant for writing code. Founder Adam Smith posted on 16 Nov 2022 that they had stopped working on Kite and were no longer supporting the software. He dates the work from 2014 to 2021 in the opening line of that post.

He wrote that the product reached 500,000 monthly-active developers with almost no marketing spend, and that it did not generate revenue: those developers would not pay. Managers, he wrote, did not pay for a claim of making developers 18% faster. Most of the code was open sourced.