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Top Developer tools companies in London

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

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

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

  1. 1
    Edutech· Greater London, England, United Kingdom
    • 25k employees
  2. 2
    Pharma Solutions Hub· London, England, United Kingdom
    • 15.1k employees
  3. 3
    Deliveroo· London, England, United Kingdom
    • Post-IPO equity
    • 11k employees
    • Founded 2013
  4. 4
    Game Developer· London, England, United Kingdom
    • 8.7k employees
    • Founded 2015
  5. 5
    Dentist AI· London, England, United Kingdom
    • 6.9k employees
Reveal 2,694 more·100 free credits, no card

Find engineers at Developer tools companies in London

London has long been a hub for Developer tools, and the list above ranks the largest Developer tools companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 2,699 matching companies in our index, this is a good map of where the Developer tools talent in Londonlives - useful whether you’re recruiting, partnering, or sizing a market.

The biggest Developer tools 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 “Developer tools engineers in Londonhiring senior staff” or “founders of Developer tools 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 Developer tools 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: Sun, 21 Jun 2026 09:35:13 GMT

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