Sifted last week launched the third annual leaderboard of the fastest-growing startups in the UK and Ireland, ranked by revenue growth over the past three years.
Drawing from hundreds of applications across London, Dublin, Cardiff, Edinburgh, Bristol, Cambridge, Glasgow and beyond, the list spans innovative companies in AI, healthtech, fintech and more.
In total, 106 investors backed two or more companies on the leaderboard. UK crowdfunding platform Crowdcube tops the list, with stakes in eight of the 100 startups.
Investors are ranked first by the number of portfolio companies that feature in this year’s cohort, followed by the average two-year revenue CAGR of those startups. The full investor ranking is available to Pro subscribers here.
Top 10 investors from Sifted’s UK & Ireland leaderboard
1/ Crowdcube
HQ: London
Crowdfunding
2025 count: 8 (+6 vs. 2025)
Startups backed include:
- Chip, an app for managing savings and investments
- Emma, budget management app
- Forest, bike rental service
2/ Accel
HQ: Palo Alto
VC firm
2025 count: 7 (+3 vs. 2025)
Startups backed include:
- Fuse Energy, which provides customers with energy and develops its own renewable energy assets
- Lottie, a site for comparing elderly care options
- Omnea, which aims to simplify procurement for finance teams
3/ Founders Factory
Accelerator
HQ: London
2025 count: 5 (+1 vs. 2025)
Startups backed include:
- Fluidstack, which build and operate high-performance GPU clusters
- Pinwheel, which helps source carbon removal/biodiversity projects
- Scan.com, a site that compares MRI scan costs
4/ Seedcamp
HQ: London
VC firm
2025 count: 5 (+1 vs. 2025)
Startups backed include:
- 9fin, which develops AI-native software for credit teams
- Griffin, which develops embedded banking products
- Primer, software for finance teams
5/ Balderton Capital
HQ: London
VC firm
2025 count: 4 (-2 vs. 2025)
Startups backed include:
- Attio, builds AI-native CRMs
- Lawhive, an AI-native law firm
- Fuse Energy
6/ Phoenix Court Group (LocalGlobe)
HQ: London
2025 count: 4 (-3 vs. 2025)
Startups backed include:
- Open Cosmos, which provides access to space data
- Yonder, provides debit and credit cards
- Field, develops battery storage infrastructure
7/ Triple Point
VC firm
HQ: London
2025 count: 4 (+2 vs. 2025)
Startups backed include:
- Trumpet, software for revenue teams
- Nory, develops software for restaurants
- Field
8/ Molten Ventures
VC firm
HQ: London
2025 count: 4 (+2 vs. 2025)
Startups backed include:
- BeZero Carbon, a carbon ratings agency
- Duel Tech, a brand advocacy SaaS platform
- Sightline, a climate intelligence platform
9/ Notion Capital
HQ: London
VC firm
2025 count: 4 (+4 vs. 2025)
Startups backed include:
- Abound, provides loans
- Griffin, provides embedded banking products
- Hokodo, provides B2B payment infrastructure
10/ NatWest
HQ: London
2025 count: 4 (+1 vs. 2025)
Startups backed include:
- Carmoola, provides car finance
- Coadjute, provides compliance software
- Roam, provides EV charging infrastructure
