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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
    • Series B
    • 383 employees
    • Founded 2021
  2. 2
    hVIVO· London, England, United Kingdom
    • Series B
    • 227 employees
    • Founded 1989
  3. 3
    Quell Therapeutics· London, England, United Kingdom
    • Series B
    • 114 employees
    • Founded 2019
  4. 4
    Basecamp Research· Greater London, England, United Kingdom
    • Series B
    • 73 employees
    • Founded 2019
  5. 5
    LabGenius Therapeutics· London, England, United Kingdom
    • Series B
    • 70 employees
    • Founded 2012
Reveal 5 more·100 free credits, no card

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 10 matching companies in our 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.

Refolk converts this list into a live search. Ask for “senior engineers at Series B AI companies in London hiring” or “founders of Series B 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 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: Sun, 21 Jun 2026 09:40:22 GMT

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