A UK startup has raised £20 million without a single venture capitalist, using an artificial intelligence agent it built itself to identify and secure investors. Narwhal Labs, a Bristol-based company founded in 2022, closed an angel funding round on 8 April 2026 backed by more than 70 UK investors. The company’s founder and chief executive, Luke Sartain, said the round was orchestrated by a bespoke AI agent that contacted high-net-worth individuals on the company’s behalf, qualified them and booked meetings – all without a traditional pitch deck or a board seat surrendered.
A self-funding product from Bristol
Narwhal Labs develops autonomous AI communication infrastructure for voice, SMS, email and WhatsApp. Its flagship platform, DeepBlue OS, is described as an operating system for customer conversations, handling inbound reception, lead qualification, outbound prospecting and workflow management. The company holds ISO 27001 and SOC 2 certifications and targets regulated industries where compliance with GDPR, TCPA and OFCOM is essential. According to the company, the platform can be deployed in under ten minutes and operates in more than 50 languages.
Luke Sartain previously founded Narwhal Media Group, a digital marketing technology business, and has also been associated with upUgo, described as the UK’s largest SEO company. Narwhal Labs has raised a total of $26.5 million over multiple rounds, with the latest £20 million tranche coming entirely from angel investors rather than institutional venture capital. One backer, Jonathan Swann, a former director of CFC Underwriting, said Narwhal Labs solves “a clear commercial problem today” and can be deployed quickly.
Why venture capital is losing its appeal
Sartain argues that the traditional venture capital model is becoming obsolete, particularly in the age of AI. He points to five reasons. First, the cost of building software has collapsed: with AI tools, raising millions to develop a product is no longer necessary. Second, the main value VCs offer – their network of introductions – has been eroded by the internet and LinkedIn, and Sartain believes AI agents will deliver the final blow by letting founders build their own networks. Third, the quality of advice from VCs is mixed. Sartain cites research showing that VCs who were previously founders (even those who failed) outperform career VCs by 7 percentage points in portfolio success rates, and that career VCs still have a success rate of only 23% compared with 30% for successful founder-VCs. He asks: “Do you need their ‘strategic guidance’?”
Fourth, according to research from Stanford University, just under half of senior VCs make at least one successful deal. Sartain argues that VCs need billion-dollar exits to return their funds, so they treat companies as lottery tickets rather than sustainable businesses, gambling with other people’s money. Fifth, taking VC money reduces a founder’s options to just four: sell, IPO, raise again, or die. “A blank canvas is traded for a straitjacket,” he said.
The critique comes against a backdrop of a booming UK tech sector valued at £1.2 trillion. In 2025, £8 billion was invested into UK venture-backed businesses, with deeptech and AI companies receiving £5 billion of that total. In the first half of 2026, AI startups in the UK raised more than £6 billion. AI companies accounted for eight of the twelve megarounds (deals over $100 million) in the first quarter of 2026, and the UK captured a record 48.4 per cent of European venture capital funding in the year to date. Yet Sartain contends that the traditional VC model is dying even as the funding pool grows.
How an AI agent replaced the pitch deck
Narwhal Labs’ approach to fundraising represents a radical departure from the standard process. The company built a bespoke AI agent tasked with raising capital – and used it to fund itself. Sartain explained that the agent called high-net-worth investors on the company’s behalf, qualified them and booked meetings. “We built the product, but we used it to fund itself,” he said. “If that doesn’t tell you VCs are optional, nothing will.”
The agent performed a set of automated actions with minimal human input, a method Sartain calls the “agentic investor model”. The result was more than 70 investors, none of whom demanded a board seat. The company kept full control, allowing it to focus on building for customers rather than meeting a fund’s internal rate of return (IRR) model. “We don’t have to work with investors telling us to ‘move fast and break things’ while they sit in Mayfair waiting for their 2 and 20,” he said.
The use of AI agents in fundraising is still rare, but it aligns with broader trends. Founders are increasingly exploring alternatives to traditional VC and bank loans, including government grants (Innovate UK offers £25,000 to £10 million), R&D tax credits, equity crowdfunding platforms such as Crowdcube and Seedrs, revenue-based financing, peer-to-peer lending, angel investors and convertible loans. The UK government also provides significant grant funding for AI innovation. Sartain believes that many AI founders still think they need VC money, but the tools now exist to build world-class products with lean teams, and capital is available outside the VC system if founders are willing to do the work.
“It’s about time founders stopped romanticising venture capital,” Sartain said. “With the right AI tools and strategy, they can start building without giving up control.”
