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.
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.
- 1Zenith· London, England, United Kingdom
- Series A
- 5.4k employees
- Founded 1988
- 2Jellyfish· London, England, United Kingdom
- Series A
- 2.3k employees
- Founded 2005
- 3We Are Social· London, England, United Kingdom
- Series A
- 1.9k employees
- Founded 2008
- 4Influencer· London, England, United Kingdom
- Series A
- 1.3k employees
- Founded 2015
- 5CLOSER· London, England, United Kingdom
- Series A
- 190 employees
- Founded 2021
- 6Ocean Outdoor UK· London, England, United Kingdom
- Series A
- 143 employees
- Founded 2007
- 7Passionfruit· London, England, United Kingdom
- Series A
- 91 employees
- Founded 2022
- 8Buyapowa· London, England, United Kingdom
- Series A
- 60 employees
- Founded 2011
- 9adWMG· London, England, United Kingdom
- Series A
- 47 employees
- Founded 2014
- 10illuma· London, England, United Kingdom
- Series A
- 43 employees
- Founded 2015
- 11Picnic· London, England, United Kingdom
- Series A
- 33 employees
- Founded 2017
- 12Palm· London, England, United Kingdom
- Series A
- 28 employees
- Founded 2010
- 13Smartology.net· London, England, United Kingdom
- Series A
- 21 employees
- Founded 2010
- 14mmi Analytics by CARMA· Twickenham, England, United Kingdom
- Series A
- 13 employees
- Founded 2014
- 15Adludio· London, England, United Kingdom
- Series A
- 12 employees
- Founded 2015
- 16Glow Digital Media· London, England, United Kingdom
- Series A
- 8 employees
- Founded 2009
- 17Contend Social (Acquired)· London, Ontario, Canada
- Series A
- 8 employees
- Founded 2016
- 18Scalify· London, England, United Kingdom
- Series A
- 8 employees
- Founded 2018
- 19Tailify· London, England, United Kingdom
- Series A
- 6 employees
- Founded 2013
- 20ContentCal· London, England, United Kingdom
- Series A
- 5 employees
- Founded 2016
- 21adtones· London, England, United Kingdom
- Series A
- 5 employees
- Founded 2015
- 22Perfect Storm Media· London, England, United Kingdom
- Series A
- 4 employees
- Founded 2005
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 22 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
Last refreshed: Thu, 07 May 2026 07:53:33 GMT
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