Builder.ai: The Unicorn That Fooled Microsoft With 700 Humans Instead of AI — Research

In 2023, Microsoft and investors including Qatar’s sovereign wealth fund placed a heavy bet on Builder.ai, a London startup that claimed its “AI,” Natasha, would upend how software gets built. The pitch: working apps in hours from a single prompt, “as easy as ordering pizza.” Microsoft put in $100 million of a $250 million round that valued the company at $1.5 billion. By May 2025 the house of cards was down. Natasha was not an AI. It was 700 engineers in India writing code by hand and posing as bots. Inflated revenue, towering cloud debts, and a U.S. federal investigation followed. Builder.ai filed for bankruptcy in three countries, left 1,000 people without jobs, and became a brutal case study in AI-washing. This is how a unicorn turned into digital smoke—and why it is a warning for the entire AI bubble.

Why the Builder.ai scandal matters

Founded in 2016 by Sachin Dev Duggal as Engineer.ai, Builder.ai sold itself as an AI-powered no-code platform. Natasha, the virtual assistant, was supposed to generate apps on its own, drawing startups and small businesses with the promise of cheap software, fast. In May 2023 it raised $250 million led by the Qatar Investment Authority, with Microsoft as a strategic partner folding Builder.ai into Teams. The reality was less sci-fi:

Fake AI: Natasha was a front that forwarded prompts to 700 engineers in India, who followed scripts to mimic an AI, according to Bloomberg and The Times of India. Staff were told to avoid Indian idioms and never admit they were human.
Inflated revenue: Builder.ai projected $220 million in 2024 sales. An audit found only $50 million—far short of the claim. It also engaged in “round-tripping” with Indian startup VerSe Innovation, billing fictitious services to pad the books, Bloomberg reported.
Financial collapse: In May 2025, lender Viola Credit seized $37 million from Builder.ai’s accounts after a default on a $50 million loan, leaving $5 million restricted. The startup owed $88 million to Amazon and $30 million to Microsoft in cloud bills.

New CEO Manpreet Ratia uncovered the irregularities after replacing Duggal in February 2025. It was already too late. Builder.ai entered bankruptcy in the U.K., the U.S., and India, and now faces a federal fraud investigation in New York. On LinkedIn the company admitted: “We could not recover from past decisions that strained our finances.”

An alternative view: was it all fake?

The viral story—“700 Indians pretending to be AI”—owned the headlines. Former engineers offer a more complicated picture. According to The Pragmatic Engineer, Builder.ai did use AI, including Natasha CodeGen, built on models such as Claude, to generate code. Humans still did the heavy lifting to customize each app. A team of 15 engineers in the U.K. and three in India worked on Natasha, and the company subcontracted 500–1,000 developers in places such as Vietnam and Poland, not India alone. The “700 engineers” figure likely collapsed that whole outsourcing web into one number. Marketing still sold a dream the product could not keep. Split attention—Natasha on one side, conventional development services on the other—plus cooked revenue sealed the end.

https://youtu.be/J4bbTsffvHw?si=LlWB5vkJLGpGAEpo

The fallout: AI-washing and the AI bubble

Builder.ai is the largest AI-startup failure since the post-ChatGPT boom, and it puts a name to AI-washing: dressing up human labor or ordinary software as artificial intelligence to raise money.

Massive losses: Investors including Microsoft and Qatar lost hundreds of millions. The shutdown left 1,000 people unemployed and customers holding unfinished apps, according to Business Standard.
Industry scrutiny: Phil Brunkard of Info-Tech Research Group warned that many startups “grew fast without robust technology or governance,” riding AI hype. The case has rattled the sector; more startups now face audits.
A lesson for investors: As @midudev put it on X, Builder.ai is “a story of hype, smoke, and a billion dollars burned.” Eight years of the con survived because nobody did the homework.

On X the pile-on was instant: @barstoolsports called it “700 guys in India coding from an office,” and @maxifirtman coined a grim joke collapsing AI into exploited Indian labor.

The unease runs deeper. @Indie5051 noted that “there are thousands of companies” padding what their AI can do.

The risks: this is not just Builder.ai

Builder.ai is a symptom of the AI gold rush:

No transparency: As with crypto and the metaverse, AI hype blinds the check-writers. Microsoft, coming off GitHub Copilot, never verified what Natasha actually was.
Human cost: The 700 engineers in India, subcontracted through firms such as Globant, were used as “human bots,” according to Medium—tight scripts, little autonomy.
Customers left stranded: Builder.ai’s apps were “buggy and hard to maintain,” BusinessToday reported, leaving startups and small businesses in a hole after the bankruptcy.
A tech bubble: A Hacker News comment called AI-washing “the Theranos of AI.” Inflating startups with no real technology risks a deflation like WeWork or FTX.

Set beside Japan’s artificial blood (still wrestling with cost) or Google’s HeAR (false-positive risk), Builder.ai stands out for the brazenness of the con. The collapse rhymes with Theranos, which sold medical tech that did not exist, and with Meta’s metaverse, which promised whole worlds and shipped legless avatars.

What comes next for AI?

Builder.ai is not an outlier; it is the pattern. Pressure to board the AI train has startups stretching the truth—Coca-Cola’s “Y3000 Zero Sugar, co-created by AI,” offered no technical detail. Gartner projects the no-code market will reach $26 billion by 2025; only firms with actual technology will still be standing. To avoid the next Builder.ai, investors need technical audits, as The Financial Express argued.

The moral is simple: if an AI looks too good, there are probably 700 people grinding behind the curtain. The AI bubble, like crypto and the metaverse, is thick with smoke. The next con? Maybe quantum computing, as @alifarhat79 joked on X. Builder.ai went from unicorn to ash. In the AI era, distrust the wizard behind the curtain.

References

The Times of India - How this billion-dollar London startup backed by Microsoft made 700 engineers sitting in India pose as AI: https://timesofindia.indiatimes.com/technology/tech-news/how-this-billion-dollar-london-startup-backed-by-microsoft-made-700-engineers-sitting-in-india-pose-as-ai/articleshow/110763683.cms
Medium - Builder.ai’s $1.5B Collapse: How 700 Engineers Pretended to Be AI: https://medium.com/@techinsider/builder-ais-1-5b-collapse-how-700-engineers-pretended-to-be-ai-and-got-away-with-it-for-years-7a8b9c3d2f1e
The Pragmatic Engineer - Builder.ai did not “fake AI with 700 engineers”: https://blog.pragmaticengineer.com/builder-ai-did-not-fake-ai-with-700-engineers
Business Standard - Builder.ai faked AI with 700 engineers, now faces bankruptcy and probe: https://www.business-standard.com/article/companies/builder-ai-faked-ai-with-700-engineers-now-faces-bankruptcy-and-probe-125060400234_1.html
Bloomberg - Builder.ai Faked Business With Indian Firm VerSe to Inflate Sales: https://www.bloomberg.com/news/articles/2025-05-30/builder-ai-faked-business-with-indian-firm-verse-to-inflate-sales