Below is a researched, curated list of 20 notable London startups / high-growth scaleups (2025) with their HQ addresses and postcodes. I used company sites, Companies House and reliable business profiles to verify head-office / registered addresses — each entry includes a source citation so you can check the original listing.
Selection note: I interpreted “Top” as high-growth, high-profile or widely-covered London tech/scaleup companies in 2025 (unicorns, recent IPO/scaleups and widely cited startups). If you want a different filter (funding, employee count, industry sector) I can regenerate the list using that metric.
- Revolut — Registered office: 30 South Colonnade, Canary Wharf, London E14 5HX. (Find and Update Company Information)
- Wise (formerly TransferWise) — Registered office: 1st Floor, Worship Square, 65 Clifton Street, London EC2A 4JE. (Find and Update Company Information)
- Checkout.com — HQ: Wenlock Works, Shepherdess Walk, London N1 7BQ. (checkout.com)
- Monzo — Address: Broadwalk House, 5 Appold Street, London EC2A 2AG. (Monzo)
- Starling Bank — Registered office: 5th Floor, London Fruit & Wool Exchange, 1 Duval Square, London E1 6PW. (Starling Bank)
- Deliveroo — HQ / registered office: The River Building, Level 1, Cannon Bridge House, 1 Cousin Lane, London EC4R 3TE. (corporate.deliveroo.co.uk)
- Babylon Health — Head office / contact listed at: 60 Sloane Avenue, London SW3 3DD (company care / registered contacts shown in public filings). (Care Quality Commission)
- Snyk — UK office / registered address: Suite 4, 7th Floor, 50 Broadway, London SW1H 0DB (Snyk’s UK entity). (Find and Update Company Information)
- Thought Machine — Head office: 7 Herbrand Street, London WC1N 1EX. (thoughtmachine.net)
- Tractable — Registered / office address (London): 71–75 Shelton Street, London WC2H 9JQ (also operates from Old Street addresses in filings). (Find and Update Company Information)
- OakNorth — Registered office: 57 Broadwick Street, Soho, London W1F 9QS. (oaknorth.co.uk)
- Onfido — Registered office: 9 Devonshire Square, 4th Floor, London EC2M 4YF (also listed at Finsbury Square offices in some profiles). (Find and Update Company Information)
- Depop — HQ address commonly listed as 7–9 Curtain Road, Shoreditch, London EC2A 3LT (company filings / profiles). (Craft.co)
- Hopin — Registered office shown at 5 Churchill Place, 10th Floor, London E14 5HU (UK registered address; note Hopin’s company status and filings). (Find and Update Company Information)
- Cazoo — Head office / corporate listings: Hotham House, 1 Heron Square, Richmond, Surrey TW9 1EP (Cazoo group listings; some corporate registrations reference London addresses). (cazoo.co.uk)
- Gousto — HQ / office listed at The Shepherds Building, Charecroft Way, Hammersmith, London W14 0EE. (Craft.co)
- BenevolentAI — Registered office: 4–8 Maple Street, London W1T 5HD. (Find and Update Company Information)
- TransferGo — Registered office: The Bower, 207 Old Street, London EC1V 9NR. (Find and Update Company Information)
- Funding Circle — Registered / head office: 71 Queen Victoria Street, London EC4V 4AY. (corporate.fundingcircle.com)
- Zopa (Zopa Bank / group) — Registered office / head office: 1st Floor, Cottons Centre, 47–49 Tooley Street, London SE1 2QG. (Zopa)
Great — below are 20 mini case studies (2025) for the London startups/scaleups we previously listed. Each entry contains: short case study (what they do, a key milestone or strategic move), the HQ + postcode, and a brief comment / lesson you can take from their story. I’ve added one or two citations per company so you can check specifics (addresses, filings and reported milestones).
1) Revolut — 30 South Colonnade, Canary Wharf, London E14 5HX
Case study: Founded 2015 as a challenger fintech, Revolut scaled rapidly through a low-friction, multi-currency app and aggressive international expansion. In 2024–25 it expanded its London footprint (taking new Canary Wharf floors) while continuing to push into banking products and crypto — balancing fast growth with regulatory scrutiny. (Find and Update Company Information)
Comment / lesson: Rapid global growth + product breadth works — but fintechs must pair growth with strong regulatory & compliance investment early.
2) Wise (formerly TransferWise) — 1st Floor, Worship Square, 65 Clifton Street, London EC2A 4JE
Case study: Wise disrupted cross-border transfers with transparent fees and mid-market FX. The company matured from start-up to listed/major-scale fintech, continually trimming fees and broadening offerings (borderless accounts, business products). In 2025 Wise’s UK entity filings show the Worship Square address. (Find and Update Company Information)
Comment / lesson: Simplicity + clear pricing builds trust. If you can explain fees in one line, you win customer trust at scale.
3) Checkout.com — Wenlock Works, Shepherdess Walk, London N1 7BQ
Case study: Checkout.com built a global payments platform targeted at enterprises (APIs for payments, risk and settlement). It scaled via large merchant deals and heavy engineering investment — remaining private and achieving high valuations while expanding its London HQ presence. (checkout.com)
Comment / lesson: For B2B platforms, focus on reliability and enterprise sales cycles — big contracts compound quickly.
4) Monzo — Broadwalk House, 5 Appold Street, London EC2A 2AG
Case study: Monzo built a mobile-first bank with a developer-friendly API and vibrant community. After rapid retail growth, it pivoted toward profitability measures (lending, business accounts) and regulatory compliance; its listed corporate address matches Broadwalk House. (Monzo)
Comment / lesson: Build community advocates early — they become powerful acquisition channels and product feedback loops.
5) Starling Bank — 5th Floor, London Fruit & Wool Exchange, 1 Duval Square, London E1 6PW
Case study: Starling focused on retail and SME banking with modular APIs and a tight product roadmap. Starling’s approach combined strong regulatory relationships and a disciplined path to profitability while keeping a London base in the Fruit & Wool Exchange. (Starling Bank)
Comment / lesson: Profitability-first strategies can sustain scale — especially where capital markets tighten.
6) Deliveroo — The River Building, Level 1, Cannon Bridge House, 1 Cousin Lane, London EC4R 3TE
Case study: Deliveroo scaled a marketplace model for restaurant deliveries and invested in logistics (dark kitchens, logistics tech). Post-IPO and through regulatory and competitive pressures, Deliveroo doubled down on operational efficiency and higher-margin partnerships. (Deliveroo plc (LSE: ROO))
Comment / lesson: Marketplaces must optimize two-sided economics — improving unit economics wins when growth slows.
7) Babylon Health — 60 Sloane Avenue, London SW3 3DD (public-facing / filings)
Case study: Babylon combined telemedicine with AI symptom-checking and remote consultations. After international expansion and some governance scrutiny, Babylon has been refocusing on regulated healthcare services and core markets while managing its licensed operations. (Care Quality Commission)
Comment / lesson: Healthtech requires strong clinical governance and transparent data practices — not optional as you scale.
8) Snyk — Suite 4, 7th Floor, 50 Broadway, London SW1H 0DB (UK entity)
Case study: Snyk built developer-first security tooling (SAST/DAST/OSS scanning) and scaled through product-led growth into large enterprises. The UK office and filings show its London footprint while product adoption in DevOps channels drove rapid ARR expansion. (Snyk)
Comment / lesson: Developer-first product design + frictionless onboarding are decisive for security tooling adoption.
9) Thought Machine — 7 Herbrand Street, London WC1N 1EX
Case study: Thought Machine sells cloud-native core banking (Vault) to banks worldwide; its sales require long-tail enterprise deals and proof-of-concept cycles. The company kept a London HQ while expanding into APAC/US — proving deep domain expertise is a moat. (thoughtmachine.net)
Comment / lesson: Vertical expertise (banking ops) plus a platform mindset allows premium pricing and defensibility.
10) Tractable — 71–75 Shelton Street, London WC2H 9JQ
Case study: Tractable uses computer vision to automate insurance and auto-damage assessments. By partnering with insurers and OEMs, it reduced claim cycle times and scaled B2B deployments globally from its London base. (Find and Update Company Information)
Comment / lesson: Narrow, measurable ROI (e.g., claim cost/time saved) makes AI products easy to sell to enterprises.
11) OakNorth — 57 Broadwick Street, Soho, London W1F 9QS
Case study: OakNorth built lending & analytics for mid-market firms and banks, offering underwriting tools and loans using sophisticated credit models. OakNorth’s London registered office anchors its fintech credibility while it expanded globally. (oaknorth.co.uk)
Comment / lesson: Building both a product (banking) and a platform (credit analytics) diversifies revenue and deepens customer ties.
12) Onfido — 9 Devonshire Square, 4th Floor, London EC2M 4YF
Case study: Onfido provides identity verification (ID document + biometric checks) to enterprises onboarding customers remotely. Address changes in 2025 show continued London operations; Onfido scaled through regulatory demand for remote KYC and partnerships across fintech and mobility sectors. (Find and Update Company Information)
Comment / lesson: Compliance-driven infrastructure (KYC/AML) can become a recurring revenue product for regulated industries.
13) Depop — 7–9 Curtain Road, Shoreditch, London EC2A 3LT
Case study: Depop scaled a Gen-Z-first resale marketplace emphasizing community and social discovery. Its value proposition (sustainable fashion + creator incomes) attracted global users and brand attention, using a small HQ footprint in Shoreditch. (solicitors.lawsociety.org.uk)
Comment / lesson: Community-first marketplaces can grow virally — but moderating trust and safety is crucial for longevity.
14) Hopin — 5 Churchill Place, 10th Floor, London E14 5HU (UK registered address)
Case study: Hopin built virtual events tooling that exploded in demand during COVID; the company scaled rapidly but later faced the hard work of transitioning from hypergrowth to sustainable unit economics and legal/financial restructuring in some entities. Companies House shows the London registered office and (in some filings) liquidation status for Hopin Ltd. (Find and Update Company Information)
Comment / lesson: Hypergrowth driven by external tailwinds must be followed by operational discipline once demand normalises.
15) Cazoo — Hotham House, 1 Heron Square, Richmond, Surrey TW9 1EP (group listings / corporate)
Case study: Cazoo scaled an online used-car marketplace and logistics stack, raised large VC rounds, then faced market headwinds leading to restructurings and ownership changes. Its head office presence in Richmond and corporate filings reflect that transition. (cazoo.co.uk)
Comment / lesson: Capital-intensive marketplaces require tight unit economics; heavy burn without margin can lead to rapid reorganization.
16) Gousto — The Shepherds Building, Charecroft Way, Hammersmith, London W14 0EE
Case study: Gousto scaled meal-kit delivery through data-driven personalization and supply-chain optimisation. Their London HQ and logistics focus enabled cost control and repeat purchase growth, turning product recommendations into retention levers. (PitchBook)
Comment / lesson: Data-driven personalization across the supply chain improves retention and cost-of-goods sold (COGS) control.
17) BenevolentAI — 4–8 Maple Street, London W1T 5HD
Case study: BenevolentAI combines AI and biomedical data to accelerate drug discovery and target identification. With a London HQ, the company works at the intersection of deep science and AI, licensing discoveries and collaborating with pharma. (Find and Update Company Information)
Comment / lesson: Deep-technology startups need long timelines and strategic pharma partnerships — expect slow, high-value payoffs.
18) TransferGo — The Bower, 207 Old Street, London EC1V 9NR
Case study: TransferGo provides remittance and cross-border payments with fast rails and clear pricing; it scaled through emerging-market corridors and a lightweight digital UX, and continues to operate from its London registered office. (TransferGo)
Comment / lesson: Focused corridor-optimised payments can win where global rails are fragmented — localisation matters.
19) Funding Circle — 71 Queen Victoria Street, London EC4V 4AY
Case study: Funding Circle built an online lending marketplace connecting small businesses with investors and institutional lenders. Post-IPO and ongoing, it has refined credit models and regulatory reporting from its London corporate base. (corporate.fundingcircle.com)
Comment / lesson: Transparent credit underwriting and regulatory credibility are must-haves for marketplace lending.
20) Zopa — 1st Floor, Cottons Centre, 47–49 Tooley Street, London SE1 2QG
Case study: Zopa evolved from peer-to-peer lending into a full digital bank, offering savings, loans and consumer banking. Its move into regulated banking products shows how P2P-origin companies can become regulated incumbents with the right capital and governance. (Zopa)
Comment / lesson: Transitioning from marketplace to bank is capital- and compliance-intensive — but it unlocks new product and margin pools.