London is a prominent player in the global start-up ecosystem, attracting investors and entrepreneurs worldwide. Known for its diversity, the city encourages innovation across various sectors.

Significant ventures such as financial technology (fintech) startups TransferWise and Revolut originated in London. Both companies received substantial VC funding supporting their global expansion. For instance, Revolut raised $580 million in total, while TransferWise secured over $1 billion in cumulative funding.

London's start-up scene continues to thrive due to initiatives like Tech City UK, now known as the Tech Nation. Launched by the UK government in 2011, this organization supports the growth of digital businesses. Another notable initiative is the London Co-investment Fund (LCIF), which works with businesses in the Science, Technology, and Research sectors. Providing funding ranging from £250,000 to £1,000,000, LCIF supports start-ups in the earliest stages of their development.

One phenomenal success in London's start-up ecosystem is Arm holdings. Originally a small start-up based in Cambridge, it moved to London and eventually sold for £24bn to SoftBank. Since 2016, Arm has continued to operate from London as a subsidiary of SoftBank, contributing to the wealth of tech talent in the city.

Investors like Robin Klein, a founding partner of Index Ventures, are instrumental to London's VC ecosystem. Index Ventures, a multi-stage international venture capital firm, has backed many successful companies, including Deliveroo, TransferWise, and Revolut.

In addition to vibrant start-up culture and high-calibre investors, London's tech ecosystem is bolstered by world-class research universities like Imperial College London and UCL, providing a steady stream of talent and innovation.