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Series A Marketing tech companies in London

Tools for marketers: CRM, attribution, content, ads, growth, and analytics. Filtered to Series A-stage companies headquartered in London.

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

Ranked by current headcount across Series A Marketing tech companies in London. Refreshed daily.

  1. 1
    Zenith· London, England, United Kingdom
    • Series A
    • 5.3k employees
    • Founded 1988
  2. 2
    Jellyfish· London, England, United Kingdom
    • Series A
    • 2.3k employees
    • Founded 2005
  3. 3
    We Are Social· London, England, United Kingdom
    • Series A
    • 1.9k employees
    • Founded 2008
  4. 4
    Influencer· London, England, United Kingdom
    • Series A
    • 1.3k employees
    • Founded 2015
  5. 5
    CLOSER· London, England, United Kingdom
    • Series A
    • 230 employees
    • Founded 2021
Reveal 19 more·100 free credits, no card

Find engineers at Series A Marketing tech companies in London

Searching for “engineers at top Series A Marketing tech companies in London” surfaces this slice of the market. The list above ranks Marketing tech companies headquartered in London whose latest disclosed round is Series A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 24 matching companies in our index, this is a tight read on where the Marketing tech talent in London is heating up.

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

Refolk converts this list into a live search. Ask for “senior engineers at Series A Marketing tech companies in London hiring” or “founders of Series A Marketing tech 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 Marketing tech 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 once a day.

Last refreshed: Sun, 21 Jun 2026 12:24:58 GMT

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