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Top SaaS companies in London

Software-as-a-service vendors selling subscription cloud software to other businesses. Filtered to companies headquartered in London.

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

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

  1. 1
    Nothing· London, England, United Kingdom
    • equity crowdfunding
    • 28.8k employees
    • Founded 2020
  2. 2
    Company· London, England, United Kingdom
    • 25.6k employees
  3. 3
    Edutech· Greater London, England, United Kingdom
    • 25.2k employees
  4. 4
    Tight and Muslim· London, England, United Kingdom
    • 15.5k employees
  5. 5
    local· Greater London, England, United Kingdom
    • 14.1k employees
    • Founded 2017
  6. 6
    AI· London, England, United Kingdom
    • 12.7k employees
  7. 7
    Clarivate· London, England, United Kingdom
    • Post-IPO equity
    • 11.4k employees
  8. 8
    Deliveroo· London, England, United Kingdom
    • Post-IPO equity
    • 10.4k employees
    • Founded 2013
  9. 9
    Women Tech Community· Greater London, England, United Kingdom
    • 10.2k employees
  10. 10
    Informa· London, England, United Kingdom
    • 9.2k employees
    • Founded 1998
  11. 11
    Game Developer· London, England, United Kingdom
    • 8.8k employees
    • Founded 2015
  12. 12
    Guden Media· Greater London, England, United Kingdom
    • 8.7k employees
  13. 13
    Dentist AI· London, England, United Kingdom
    • 6.8k employees
  14. 14
    Travel AI· London, England, United Kingdom
    • 6.3k employees
    • Founded 2022
  15. 15
    FinTech Foundry· London, England, United Kingdom
    • 6.1k employees
  16. 16
    ION· London, England, United Kingdom
    • 5.7k employees
    • Founded 1998
  17. 17
    Shopify Developer· London, England, United Kingdom
    • 5.5k employees
  18. 18
    News UK· London, England, United Kingdom
    • 5.2k employees
    • Founded 1981
  19. 19
    YouGov· London, England, United Kingdom
    • Post-IPO debt
    • 4.7k employees
    • Founded 2000
  20. 20
    IHS Markit· London, England, United Kingdom
    • Series unknown
    • 4.7k employees
    • Founded 2020
  21. 21
    HealthTech· London, England, United Kingdom
    • 4.5k employees
  22. 22
    Simulation AI· London, England, United Kingdom
    • 4k employees
  23. 23
    Depop· London, England, United Kingdom
    • non equity assistance
    • 3.9k employees
    • Founded 2011
  24. 24
    PeoplePerHour· London, England, United Kingdom
    • Series unknown
    • 3.9k employees
    • Founded 2007
  25. 25
    Zuchon· London, England, United Kingdom
    • 3.7k employees

Find engineers at SaaS companies in London

London has long been a hub for SaaS, and the list above ranks the largest SaaS companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 5,084 matching companies in our index, this is a good map of where the SaaS talent in Londonlives — useful whether you’re recruiting, partnering, or sizing a market.

The biggest SaaS companies in London tend to be the gravitational centres for specialised talent — senior engineers, ML researchers, applied scientists, designers — while the smaller ones compete on speed, equity, and proximity to founders.

Refolk converts this list into a live search. Ask for “SaaS engineers in Londonhiring senior staff” or “founders of SaaS companies in Londonwho left in the last 12 months” and Refolk returns a ranked shortlist with the evidence that earned each person a spot.

How this list is built

Refolk pulled SaaS companies headquartered in London from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 10 employees. The list refreshes once a day.

Last refreshed: Thu, 07 May 2026 07:42:57 GMT

Need an even more specific search?

Refolk runs natural-language searches across LinkedIn, GitHub, and the open web. Try one of these:

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