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Top Seed companies in London

Companies on their seed round, typically the first priced equity raise. Filtered to companies headquartered in London.

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Built from a search like: “Top Seed companies in London”

Ranked by current headcount across Seed companies headquartered in London. Refreshed daily.

  1. 1
    Cloud Consulting· London, England, United Kingdom

    cloud consultingCloud consulting is a digitally native company that helps organisations reinvent themselves and unleash our potential through cloud computing.

    • Seed
    • 14.6k employees
    • Founded 2018
  2. 2
    Foreign, Commonwealth and Development Office· London, England, United Kingdom

    We lead the UK’s diplomatic, development and consular work around the world.

    • Seed
    • 6.5k employees
    • Founded 1968
  3. 3
    Idea· London, England, United Kingdom

    At Idea, the work that we do enables our clients to realise greater possibilities and move forward faster than before.We help organisations overcome their business challenges by providing solutions that are clear and understandable. This, in turn, helps us to build strong relationships and earn our clients’ loyalty and repeat business.From concept to design, development to deployment and beyond, we can be there for you at any point in the technology solution cycle. Because, in the world of IT, innovation is always a work in progress.To learn more, please visit agency.org.uk today.

    • Seed
    • 3.7k employees
    • Founded 1999
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  5. 4
    Healthcare AI· London, England, United Kingdom

    Healthcare AI leverages machine learning algorithms and software to analyse complex medical data, leading to improved diagnosis, treatment, and prevention of diseases. By mimicking or exceeding human cognitive abilities, AI helps healthcare professionals make informed decisions, streamline workflows, and enhance patient care.

    • Seed
    • 3.4k employees
    • Founded 2024
  6. 5
    Any One Thing· London, England, United Kingdom

    Small, independent theatre production company.

    • Seed
    • 3.2k employees
    • Founded 2019
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Find engineers at Seed companies in London

Seed companies in London are some of the fastest-moving employers in the market. The list above ranks the largest Seed-stage companies headquartered in London by current headcount, drawn from public LinkedIn and Crunchbase records. With 2,076 matching companies in Refolk’s index, the density of senior engineers, designers, and founders is unusually high.

At Seed, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the London talent market is heating up - and for which engineers and founders are about to become tomorrow’s operators.

Refolk converts this list into a live search. Ask for “founders of Seed companies in London” or “senior engineers at Seed companies in London hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled Seed companies headquartered in London from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 11:35:36 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 page re-renders at least daily. Last refreshed: Wed, 05 Aug 2026 11:35:36 GMT.

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