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Series B AI companies in London

Companies building AI products, foundation models, and applied ML platforms. Filtered to Series B-stage companies headquartered in London.

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Built from a search like: Top Series B AI companies in London

Ranked by current headcount across Series B AI companies in London. Refreshed daily.

  1. 1
    Isomorphic Labs· London, England, United Kingdom

    Isomorphic Labs is here to advance human health by building on and beyond the Nobel-winning AlphaFold system. Our interdisciplinary team has developed a unified, state-of-the-art drug design engine that will transform how we design new drugs, and ultimately change the way medicine will help and heal people. Every day, and with each new breakthrough, we’re getting closer to achieving our ambitious mission to one day solve all disease

    • Series B
    • 402 employees
    • Founded 2021
  2. 2
    hVIVO· London, England, United Kingdom

    hVIVO plc (Ticker: HVO) is a science‐led early‐phase drug development company purpose‐built to meet the growing complexity of modern clinical research. The Company operates an integrated early‐phase ecosystem that combines specialist clinical sites, advanced virology and immunology laboratories, human challenge expertise, and early drug development consulting. This unified model enables sponsors to generate rigorous, decision‐ready human data earlier in development, reducing uncertainty and accelerating progression through Phase I and II trials.With industry‐leading capabilities in respiratory and infectious disease, alongside expanding expertise in cardiometabolic and other high‐growth therapeutic areas, hVIVO supports a diverse global client base that includes seven of the world’s ten largest biopharmaceutical companies. Its London quarantine facilities are the largest purpose‐built human challenge units in the world, complemented by additional early‐phase clinical capacity in Germany and a specialist consulting team providing strategic, regulatory, and biometry expertise.The Company’s integrated approach delivers a seamless pathway from preclinical planning through early proof‐of‐concept, supported by continuous patient recruitment through FluCamp and a network of outpatient clinical sites for Phase II and III studies. By unifying scientific insight, operational control, and advanced laboratory capabilities, hVIVO provides sponsors with the clarity, speed, and reliability required to advance new medicines with confidence.

    • Series B
    • 236 employees
    • Founded 1989
  3. 3
    Quell Therapeutics· London, England, United Kingdom

    An exciting new cell therapy immunology biotech committed to transforming patient's lives in solid organ transplantation and auto-immune conditions.Our company is growing and we are exciting about the future! Our vision is to become a world leader in new cell therapy and the people are at the heart of what we do. We treat our people with respect, working collaboratively across the business, taking ownership and accountability for the outcomes and results we delivery. Most of all we work with integrity to innovate and bring the best version of ourselves to the job every day.

    • Series B
    • 113 employees
    • Founded 2019
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  5. 4
    Orbital Industries· London, England, United Kingdom

    Orbital Industries is an AI industrial company building physical products - designed with its frontier AI, from the atoms up. By co-designing advanced materials and hardware, the company builds critical infrastructure faster than previously possible. For more information, visit www.orbitalindustries.com

    • Series B
    • 65 employees
    • Founded 2022
  6. 5
    Purespring Therapeutics· London, England, United Kingdom

    Purespring, which launched in November 2020 with £45 million of funding from Syncona Ltd, is the first company to be directly targeting the podocyte, a specialized kidney cell implicated in many kidney diseases, through AAV gene therapy. This approach is based on the work of Professor Moin Saleem, Professor of Paediatric Renal Medicine at the University of Bristol, where he heads a world leading group researching glomerular diseases.

    • Series B
    • 58 employees
    • Founded 2020

Find engineers at Series B AI companies in London

Searching for “engineers at top Series B AI companies in London” surfaces this slice of the market. The list above ranks AI companies headquartered in London whose latest disclosed round is Series B, by current headcount, drawn from public LinkedIn and Crunchbase records. With 9 matching companies in Refolk’s index, this is a tight read on where the AI talent in London is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Series B, AI, in London - are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become AI’s next operators and angel investors.

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How this list is built

Refolk pulled AI companies headquartered in London whose latest disclosed funding round is Series B from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 19:37:50 GMT

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