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Series A AI companies in London

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

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Built from a search like: “Top Series A AI companies in London”

Ranked by current headcount across Series A AI companies in London. Refreshed monthly.

  1. 1
    Google DeepMind· London, England, United Kingdom

    We’re a team of scientists, engineers, machine learning experts and more, working together to advance the state of the art in artificial intelligence. We use our technologies for widespread public benefit and scientific discovery, and collaborate with others on critical challenges, ensuring safety and ethics are the highest priority.Our long term aim is to solve intelligence, developing more general and capable problem-solving systems, known as artificial general intelligence (AGI). Guided by safety and ethics, this invention could help society find answers to some of the world’s most pressing and fundamental scientific challenges. We have a track record of breakthroughs in fundamental AI research, published in journals like Nature, Science, and more.Our programs have learned to diagnose eye diseases as effectively as the world’s top doctors, to save 30% of the energy used to keep data centres cool, and to predict the complex 3D shapes of proteins - which could one day transform how drugs are invented.

    • Series A
    • 10.4k employees
    • Founded 2010
  2. 2
    Stylus· London, England, United Kingdom

    Stylus is the trends intelligence partner for forward-looking brands and agencies. We forecast consumer futures to empower confident decision-making and inspire successful innovation. We are the trusted authority for expert analysis and verified insights across 20 sectors, looking beyond regional and industry boundaries. Our dedicated team of global specialists add practical, commercial analysis to the insights that matter to you. With Stylus you can make real-world impact and build business value, creating better futures for you, your business, people and the planet.

    • Series A
    • 254 employees
    • Founded 2010
  3. 3
    EyeBio· London, England, United Kingdom

    EyeBio is a privately held ophthalmology biotechnology company dedicated to developing and delivering a new generation of therapies to protect, restore, and improve vision in patients with sight-threatening eye diseases.

    • Series A
    • 109 employees
    • Founded 2021
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  5. 4
    uMed· London, England, United Kingdom

    uMed combines RWE with the power of patient generated data to address the evidence gaps in life science research. By leveraging uMed’s ACCESS Research Platform which is embedded across a global network of healthcare institutions, researchers can rapidly access and engage with patients to generate insights derived from the decentralised collection of electronic health records, clinical outcomes, patient-reported data and biosamples.

    • Series A
    • 91 employees
    • Founded 2018
  6. 5
    IMU Biosciences· London, England, United Kingdom

    Mapping the immune system in unprecedented detail and scale. IMU’s discovery platform is building a new understanding of the immune system across health and disease, through next generation high resolution, systems-level immune profiling with AI & ML analytics.

    • Series A
    • 80 employees
    • Founded 2019

Find engineers at Series A AI companies in London

Searching for “engineers at top Series A 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 A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 21 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 A, 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.

Refolk converts this list into a live search. Ask for “senior engineers at Series A AI companies in London hiring” or “founders of Series A AI companies in London who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.

How this list is built

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

Last refreshed: Sun, 18 Oct 2026 21:28:34 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

How fresh is the data?

The underlying index updates continuously and this ranking is rebuilt monthly. Last refreshed: Sun, 18 Oct 2026 21:28:34 GMT. For a list built against the index as it stands today, sign up and run the search live.

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