Tech

Andreessen Horowitz has invested $20 million in a British company that builds 'virtual worlds'

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Herman Narula improbable ceo
Improbable founder and CEO Herman Narula.  Improbable

Andreessen Horowitz has just invested $20 million into Improbable, a London-based startup that is building software to help create "virtual worlds," TechCrunch reports. It's the latest example of the wave of Silicon Valley cash that is flooding into Britain.

Founded in 2012, Improbable doesn't aim to build these worlds itself. Instead, the startup is working to build the underlying infrastructure that other companies can then utilise to create complex environments that thousands of people can interact with. These could be massive gaming multiplayer games — or it could equally be used for urban planning, or modelling the spread of disease.

Virtual worlds are often centralised in a few servers, but Improbable tries to decentralise this. "You can imagine our approach as a swarm of decentralised, heterogeneous workers collaborating together to form a simulation much larger than any single worker can understand," the company explains in a blog post. 

Improbable aims to "hide this operational complexity from developers, whilst making it financially viable and easy to build simulated worlds."

Respected venture capital firm Andreessen Horowitz is now investing $20 million into Improbable, with the Financial Times reporting a valuation of around $100 million, citing someone "familiar with the matter." Investor Chris Dixon will be joining Improbable's board as a result.

In a blog post, Dixon says the company has "built an outstanding team of engineers and computer scientists form companies like Google and top UK computer science programs. They’ve done all of this on a small seed financing, supplemented by customer revenue and research grants. We are thrilled to partner with Improbable on their mission to develop and popularise simulated worlds."

Improbable is just the latest in an increasingly long line of British tech companies benefiting from injections of Silicon Valley capital. Over the last three months, there have been three "unicorns" created — private companies with $1 billion-plus valuations. Music discovery service Shazam raised $30 million at the milestone valuation in January. Boutique online retailer Farfetch also achieved unicorn status in March, with the funding round led by DST, a firm that has previously invested in Twitter, Facebook, Xiaomi and more.

And money transfer service TransferWise is the third, raising $58 million in early 2015, sharing investment firm Andreessen Horowitz with Improbable. The FinTech sector has often benefited from American investment. There's also WorldRemit's $100 million (investor TCV has also backed Facebook, Spotify and Netflix) and Funding Circle, who raised $65 million in 2014 from Accel Partners and Union Square Ventures.

In an interview with Wired in 2014, founder Herman Narula said that Improbable wants to be the "Google of simulation." With this latest funding round, the right people are finally listening.

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Rob Price was a senior correspondent at Business Insider, based in San Francisco. He wrote investigations and long-form features about platforms, people, and power in Silicon Valley.His stories variously led to attorney general investigations, large-scale internal reviews at major tech companies, high-profile personnel departures, citation by state and federal lawmakers, and the closure of a well-funded startup. His 2022 story on the Bitfinex hack is being adapted into a feature film, and in 2024 he received an SPJ NorCal Excellence in Journalism award for his reporting on AI and relationships.Rob's scoops and exclusive stories were cited by The New York Times, Bloomberg, the BBC, Associated Press, Reuters, CNBC, Politico, The Guardian, Axios, and many other national and international publications. His writing has also been published in or syndicated by The Washington Post, The Independent, Vice, Slate, and elsewhere, and he appeared on CNN, the BBC, CBS, Reuters, ABC Australia, and other broadcast media to discuss technology, business, and culture.He worked for Business Insider from 2015 to 2025. Prior to joining the features team, Rob covered Facebook and Silicon Valley, and before that wrote about tech business, policy, and the gig economy in London. Between September and October 2019, he was acting executive editor for Business Insider's UK bureau. He also sat on the board of directors for the San Francisco Press Club, the leading non-profit media advocacy group in the Bay Area, and was a volunteer crew member at the Marine Mammal Center, the world's largest animal hospital for marine mammals. You can contact Rob Price via email at robaeprice@gmail.com, or +1 650-636-6268 (Signal / WhatsApp / Cell). Selected stories:— They spoke out against their employer. Then they were hit with trade secrets suits.— The rise of 'shadow stand-ins'— App, Lover, Muse: Inside a 47-year-old Minnesota man's three-year relationship with an AI chatbot— Deel Speed: The inside story of a $12 billion HR startup's breakneck growth— Private islands, flying cars, and psychedelic parties: Inside the wild post-Google lives of Larry Page and Sergey Brin— 'I want your Instagram account': First came the threatening texts, followed by the SWAT teams. Then someone wound up dead.— Inside Iconiq: How Mark Zuckerberg's banker built a secret Silicon Valley empire and made billions— Gaia was a wildly popular yoga brand. Now it's a publicly traded Netflix rival pushing conspiracy theories while employees fear the CEO is invading their dreams— A drunken late-night assault allegation has roiled the secretive world of Mark Zuckerberg's private family office. Personal aides are speaking out about claims that household staff endured sexual harassment and racism from their colleagues.