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Series C Developer tools companies in London

IDEs, runtimes, frameworks, and platforms built primarily for engineers. Filtered to Series C-stage companies headquartered in London.

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Built from a search like: “Top Series C Developer tools companies in London”

Ranked by current headcount across Series C Developer tools companies in London. Refreshed daily.

  1. 1
    Dext· London, England, United Kingdom
    • Series C
    • 511 employees
    • Founded 2010
  2. 2
    Vertice· London, England, United Kingdom
    • Series C
    • 500 employees
    • Founded 2021
  3. 3
    ComplyAdvantage· London, England, United Kingdom
    • Series C
    • 490 employees
    • Founded 2014
  4. 4
    Cognism· London Colney, England, United Kingdom
    • Series C
    • 458 employees
    • Founded 2015
  5. 5
    Swap· London, England, United Kingdom
    • Series C
    • 354 employees
    • Founded 2022
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Find engineers at Series C Developer tools companies in London

Searching for “engineers at top Series C Developer tools companies in London” surfaces this slice of the market. The list above ranks Developer tools companies headquartered in London whose latest disclosed round is Series C, by current headcount, drawn from public LinkedIn and Crunchbase records. With 21 matching companies in our index, this is a tight read on where the Developer tools talent in London is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Series C, Developer tools, 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 Developer tools’s next operators and angel investors.

Refolk converts this list into a live search. Ask for “senior engineers at Series C Developer tools companies in London hiring” or “founders of Series C Developer tools 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 Developer tools companies headquartered in London whose latest disclosed funding round is Series C 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 09:35:27 GMT

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