Builder.ai
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Builder.ai was a London-based software startup that promised to make building a mobile or web application "as easy as ordering pizza" through an artificial-intelligence assistant branded Natasha. Formerly named Engineer.ai, the company raised more than $445 million from backers including Microsoft, the Qatar Investment Authority, and SoftBank Group's DeepCore fund, reaching a peak valuation of roughly $1.5 billion. In May 2025 it collapsed into insolvency after a creditor seized about $37 million from its bank accounts and an internal review concluded that its reported revenue had been overstated by several hundred percent. The failure became one of the highest-profile collapses of the generative AI boom and a frequently cited example of "AI washing," the practice of marketing routine or human-performed work as artificial intelligence. Builder.ai should not be confused with Builder.io, a separate and still-operating visual-development company that has no connection to it beyond the similar name.
Builder.ai sold a platform that let non-technical customers commission custom software without writing code, positioning itself within the broader no-code and low-code market. Buyers selected from a catalogue of pre-built feature blocks (logins, payments, messaging, e-commerce carts) that the company likened to assembling Lego, and an assistant called Natasha was marketed as the artificial intelligence that turned a customer's idea into a working product. The pitch attracted strategic and sovereign-wealth money during the post-ChatGPT investment surge of 2022 and 2023, and Builder.ai was for a time held up as one of the United Kingdom's most prominent AI companies. After new management took over in early 2025 and found large gaps between reported and actual sales, lenders moved to protect their loans, the business ran out of cash, and it entered formal insolvency in the United Kingdom, the United States, and India. The episode drew comparisons to other startup implosions and prompted investigations by United States prosecutors.
It is important to distinguish Builder.ai from Builder.io. Builder.io, founded in 2018 by Steve Sewell, is an unrelated visual-development and headless content-management company that integrates a drag-and-drop editor into a customer's existing codebase. Builder.io remained an operating, privately held business through 2025 and 2026 and was not involved in any of the events described here. The collapse and fraud allegations concern only Builder.ai, the former Engineer.ai.
The business that became Builder.ai traces to a venture Sachin Dev Duggal started in the early 2010s. It operated as Engineer.ai from around 2016, presenting itself as an "AI-powered" way to build software, and rebranded to Builder.ai in 2019 after early skepticism about its technology. Duggal, a British entrepreneur, led the company as chief executive but styled himself with the unusual title of "Chief Wizard," a label he retained even after stepping down as CEO. A friend, Saurabh Dhoot, was at times described as a co-founder, though the company later said he was not involved in the founding.
Duggal's central promise was that ordinary people should be able to order software the way they order food. As he put it, the goal was to make building an app "as easy as ordering pizza." The product face of that promise was Natasha, launched in September 2021 and marketed as the "world's first AI-powered product manager," represented on screen by a purple dot and a synthesized voice. Builder.ai claimed Natasha could construct at least 80 percent of an app automatically before human engineers added the finishing touches, and Duggal spoke of a future in which a customer could phone Natasha and have a finished app in an app store days later. In practice, former employees said most of the coding was carried out by human developers working through outsourcing firms in India and Ukraine that Builder.ai internally called "capacity partners," with Natasha producing limited front-end output that still required human verification and rework.
Doubts about how much real artificial intelligence Builder.ai used long predated its collapse. In August 2019, while the company was still called Engineer.ai, The Wall Street Journal reported that the firm exaggerated its use of AI and that much of its software was written by conventional human engineers, citing current and former staff. Around the same time, a former chief business officer alleged in a lawsuit that Duggal had raised money on technology that was "nothing more than smoke and mirrors" and had misled investors; that case was later settled.
After the 2025 collapse, the AI-washing narrative dominated coverage, often summarized in headlines claiming that Builder.ai's "AI" was actually roughly 700 engineers in India. That specific figure is best treated as an approximation drawn from press accounts rather than an audited headcount, but the underlying point was widely corroborated by former employees and by reporters: the company leaned heavily on human labor while marketing the output as machine-generated. The case became a reference point in debates over AI washing because Builder.ai had attracted blue-chip investment and a chatbot-style interface at a moment when capital was rushing toward anything branded as a large language model or autonomous AI agent. Builder.ai for its part always maintained that it used a genuine "human-assisted AI" model rather than pure automation, and not every claim about the company has been independently proven; the confirmed facts are the insolvency, the layoffs, the revenue restatements, and the investigations, while characterizations of intent remain contested.
Despite the early warnings, Builder.ai raised large sums from credible institutions. Its 2018 Series A, one of the larger European rounds of its time, was led by Lakestar and Jungle Ventures with participation from SoftBank's DeepCore. A $100 million Series C in March 2022 was led by Insight Partners, with the International Finance Corporation (the private-sector arm of the World Bank), Jeffrey Katzenberg's WndrCo, and Palo Alto Networks chief Nikesh Arora among the investors. The defining round came in 2023, when the Qatar Investment Authority led a raise of about $250 million; around the same time Microsoft announced a strategic, undisclosed equity investment and a partnership to integrate Natasha into Microsoft Teams and to run Builder.ai on Microsoft Azure and OpenAI-powered Azure services. In total the company drew more than $445 million in venture capital and strategic investment and crossed the $1 billion threshold to become a unicorn, with its peak valuation reported at about $1.5 billion.
| Date | Round | Amount | Lead and notable investors |
|---|---|---|---|
| 2018 | Series A | about $29.5 million | Lakestar, Jungle Ventures, SoftBank DeepCore |
| March 2022 | Series C | $100 million | Insight Partners; IFC, WndrCo, Nikesh Arora |
| 2023 | Series D | about $250 million | Qatar Investment Authority; Microsoft (strategic) |
| Total | All rounds | more than $445 million | Peak valuation about $1.5 billion |
The unraveling accelerated in early 2025. On 27 February 2025 Duggal resigned as chief executive while keeping a board seat and his "Chief Wizard" title, and Manpreet Ratia took over as CEO; the company cut around 270 jobs at that point. Reviewing the books, the new leadership found that sales had been dramatically overstated. Bloomberg reported on 22 May 2025 that Builder.ai had told key creditors it expected about $220 million of revenue for 2024 when the real figure was closer to $50 million, an overestimate of roughly 300 percent, and that 2023 revenue had likewise been restated downward from about $180 million to roughly $45 million.
Reporting also pointed to how some of that revenue was allegedly manufactured. Bloomberg reported on 30 May 2025 that Builder.ai and the Indian media company VerSe Innovation, the owner of the Dailyhunt app, had for years engaged in "round-tripping," billing each other for similar amounts of work between 2021 and 2024 so that each could book the payments as sales. The reciprocal billing was reported at roughly $60 million in total. VerSe Innovation strongly denied any wrongdoing, calling any suggestion that it had colluded to inflate revenue "entirely false, defamatory, and irresponsible."
The financial shortfall triggered the endgame. In May 2025 Viola Credit, an Israeli lender that had extended a debt facility to Builder.ai, swept about $37 million from the company's accounts after the revenue problems breached its loan terms, leaving only around $5 million, which was restricted. Unable to meet payroll across its operations in the United Kingdom, the United States, India, Singapore, and the United Arab Emirates, the company gave up. On 20 May 2025 Ratia told remaining staff that Builder.ai had run out of money and would file for insolvency, and that essentially all of them were being let go; in total roughly 1,000 employees lost their jobs across the 2025 cuts. The company also reportedly owed large sums for cloud computing, with figures of about $85 million to Amazon and about $30 million to Microsoft cited in press accounts.
Builder.ai entered formal insolvency proceedings in several jurisdictions. In the United Kingdom, the restructuring firm Alvarez & Marsal was lined up to administer the British entities; the company's United States holding company filed for Chapter 7 bankruptcy, reporting liabilities of up to $100 million against less than $10 million of assets; and parallel proceedings followed in India.
The collapse also drew the attention of prosecutors. Days before the insolvency, the United States Attorney's Office for the Southern District of New York in Manhattan issued subpoenas to current and former staff seeking financial records and a customer list, and some employees were asked to preserve documents in connection with a potential criminal investigation into inflated sales and round-tripping. Separately, in India the Enforcement Directorate named Duggal as a "key beneficiary" in a money-laundering complaint tied to an older transaction involving his earlier cloud-computing venture, Nivio, and the now-defunct Videocon group, an allegation that predates Builder.ai and which Duggal's representatives have said they would not address until it was heard by a court. As of mid-2026 these matters remained ongoing, and the allegations against individuals were unproven.
Builder.ai is now widely used as a cautionary tale. To supporters of the technology it is a warning that an AI-branded chatbot interface, a marquee investor list, and a unicorn valuation are not evidence of working artificial intelligence, and that "human-in-the-loop" can shade into "humans doing the work." For customers it underscored the operational risk of building a business on a single vendor's hosted platform, since clients reportedly lost access to apps and data when the company shut down. And for investors it became a case study in how the fear of missing out during the generative AI boom could outrun diligence. The contrast with the unrelated and healthy Builder.io, repeatedly noted by commentators, only sharpened the lesson that, in a crowded field of similarly named startups, the label "AI" is a marketing claim and not a guarantee.