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Top Blockchain companies in London

Companies building L1s, L2s, wallets, infra, and apps on public blockchains. Filtered to companies headquartered in London.

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

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

  1. 1
    HSBC· London, England, United Kingdom
    • Post-IPO debt
    • 197.3k employees
  2. 2
    Aon· London, England, United Kingdom
    • Post-IPO debt
    • 92.8k employees
    • Founded 1979
  3. 3
    Barclays· London, England, United Kingdom
    • 82k employees
  4. 4
    Standard Chartered· London, England, United Kingdom
    • Post-IPO debt
    • 79.5k employees
  5. 5
    Lloyds Banking Group· London, England, United Kingdom
    • 57.5k employees
    • Founded 1985
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Find engineers at Blockchain companies in London

London has long been a hub for Blockchain, and the list above ranks the largest Blockchain companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 5,872 matching companies in our index, this is a good map of where the Blockchain talent in Londonlives - useful whether you’re recruiting, partnering, or sizing a market.

The biggest Blockchain 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 “Blockchain engineers in Londonhiring senior staff” or “founders of Blockchain 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 Blockchain 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 14:58:35 GMT

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