These London-based companies specialize in the cryptocurrency sector, encompassing financial services, technology, and marketing. The majority are mid-sized to large firms, with a notable presence of established players alongside younger companies. They primarily focus on providing infrastructure, trading, and custodial solutions for digital assets.
Key companies include Crypto Marketing, which specializes in blockchain technology branding, and Blockchain.com, offering secure access to cryptocurrencies. Luno aims to make crypto investing safe and easy, while GSR provides institutional-grade market making and strategic guidance. Copper.co offers secure custody and trading for institutional investors, and R3 provides digital currency solutions for financial infrastructures. A common theme is the provision of financial services and technological support for the rapidly evolving crypto industry.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 
Crypto Marketingmarketizon.com
Specializing in blockchain technology and performance branding to establish brands as industry leaders in the crypto world |
1,471 | |||
| 2 |
Blockchain.comblockchain.com
A leading fintech company offering secure access to cryptocurrencies like Bitcoin and Ethereum through their Wallet and Exchange platforms Stay safe and informed |
1,184 | |||
| 3 | 729 | ||||
| 4 | 556 | ||||
| 5 |
Consigliamo Onlinelinktr.ee
Online blog providing information on Bitcoin, cryptocurrencies, technology, and related services |
520 | |||
| 6 | 345 | ||||
| 7 | 268 | ||||
| 8 | 228 | ||||
| 9 |
BCB Groupbcbgroup.com
Leading crypto payment services provider offering payments, FX, liquidity, custody, and instant settlements network to major industry clients worldwide Banking the global crypto industry |
220 | |||
| 10 |
Nethermindnethermind.io
A team of experts in Ethereum, DeFi, and blockchain providing technology, R&D, and consulting services, contributing to Ethereum core development |
206 | |||
| 11 | 198 | ||||
| 12 |
Parity Technologiesparity.io
It develops software solutions that help businesses and organizations leverage blockchain technology, unlocking new opportunities and enhancing existing systems. |
184 | |||
| 13 |
Alteryaltery.com
A Fintech company based in London revolutionizing cross-border payments for digital enthusiasts with mobile, web services, and digital banking products |
117 | |||
| 14 | 113 | ||||
| 15 |
Ramp Networkrampnetwork.com
A non-custodial full-stack infrastructure enabling seamless movement between fiat and crypto, providing transparency, compliance, and trust for businesses in Web3 |
109 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 | 93 | ||||
| 17 |
Socrates Globalsocrates.com
A web3 platform on the blockchain where users earn rewards for Q&As, debates, and knowledge sharing, promoting freedom of speech and high-quality content |
91 | |||
| 18 |
Ctrl Altctrl-alt.co
Designing and operating blockchain infrastructure for tokenizing alternative assets like real estate and private credit, enabling institutional issuance, trading, and management on-chain. |
89 | |||
| 19 | 48 | ||||
| 20 |
Baanx Group Ltdbaanx.com
B2B2C service provider offering digital asset-friendly financial services like debit cards, digital wallets, IBANs, borrowing/lending, remittance, payment gateways, and white-label blockchain applications |
45 | |||
| 21 |
Virtuavirtua.com
A gamified metaverse offering immersive social, web3 gaming, digital collectibles, and interactive experiences for users |
42 | |||
| 22 | 40 | ||||
| 23 |
Coinweb Labscoinweblabs.io
A platform solving blockchain issues by creating collaborative, connected, and accessible technology for all Contact hello@coinwebio or visit wwwcoinwebio |
31 | |||
| 24 |
Curatecurate.style
A decentralized platform rewarding users with digital tokens for curating fashion styles, partnering with brands to showcase and sell their latest collections |
26 | |||
| 25 |
Nickel Digital Asset Managementnickel.digital
Offers institutional investors secure, efficient, and transparent access to growth opportunities in the digital asset market, delivering uncorrelated returns through arbitrage strategies. |
25 | |||
| 26 |
ICONOMIiconomi.com
An investment platform providing access to the cryptocurrency market with exchange diversification, portfolio monitoring, and the option to copy successful strategies |
24 | |||
| 27 |
Nexus Mutualnexusmutual.io
A leading on-chain insurance alternative protecting over $44B of crypto assets, paying out $17M+ in claims, and partnering with institutions and traditional insurance companies |
21 | |||
| 28 |
Ephelia Groupepheliagroup.com
A global financial group providing Fintech services in Payments, Electronic Money, Investments, and Compliance across Europe, US, UK, Switzerland, and New Zealand |
21 | |||
| 29 |
Kappa Labkappalab.io
Specializing in systematic trading and product innovation in the digital assets space, this technology company is known for its expertise in the field |
17 | |||
| 30 |
Coda Labscodaplatform.com
A team focused on creating fun mobile games using blockchain technology, aiming to drive web3 adoption and new economic opportunities for developers and players |
14 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in London
- The largest companies in London 12,882
- Multinational companies in London 3,652
- Financial Services companies in London 1,862
- Financial services firms in London 1,824
- SaaS companies in London 1,615
- Professional services firms in London 1,248
- Software Development companies in London 1,217
- Retail chains in London 942
- IT Services and IT Consulting companies in London 693
- Companies with a mobile app in London 667
- Consulting firms in London 648
- IT services companies in London 607
- Subscription businesses in London 544
- Venture capital and private equity firms in London 539
- Marketing and communications agencies in London 533
- Retail Apparel and Fashion companies in London 498
- Advertising Services companies in London 480
- Companies with in-house R&D in London 477
- AI companies in London 456
- Investment Management companies in London 452
- Hotel and hospitality groups in London 445
- Luxury brands in London 428
- AI-native companies in London 407
- E-commerce companies in London 384