Healf, a London wellness marketplace, has 1,403% two-year revenue CAGR to top Sifted's third annual UK and Ireland 100 fastest-growing companies ranking. Founded by brothers Lestat McCree and Max Clarke in 2020, the platform curates high-end health products backed by expert panels. The wellness industry leaderboard reflects a crowded market with bold claims, though Healf differentiates itself through expert curation.

Second place went to Fuse Energy with a 900% CAGR, while Apron, a London startup preventing cold, damp rentals, ranked third with a 733% CAGR. Fintech dominated the list with 36 companies, though AI-native firms saw growth from 16 to 24 participants. The cohort raised £18.53bn collectively and hired over 10,000 staff, with London hosting 74 companies. Oxa secured the largest 2026 funding round at £77.5m Series D for self-driving software, while Tines achieved a $1bn valuation as a Dublin security automation unicorn.

Healf's success underscores the wellness sector's potential despite market saturation.