Top Web3 Developers in the United Kingdom
From London’s world-leading fintech scene to research hubs in Cambridge and Oxford and creative tech clusters in Manchester and Edinburgh, the United Kingdom is a strong base for Web3 innovation. Whether you’re building a DeFi platform, launching NFTs, or integrating on-chain identity, the right U.K. partner can help you ship secure code and navigate local compliance.
Clutch makes it easier to find trusted Web3 development companies by verifying client reviews, showcasing detailed case studies, and profiling tech expertise across EVM, Rust/Solana, and more. Use filters to narrow U.K.-based partners by budget, hourly rate, industry, location, and blockchain stack. Explore these directories to get started:
• Web3 Developers in Manchester
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$25,000+$25 - $49 / hr250 - 999London, England
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See all 100 projectsComputools is a versatile software development company specializing in technology solutions such as biometric authentication, AI-based radiology tools, IoT systems, and mobile app development. Across multiple reviews, 100% of clients highlighted their technical expertise, structured project management, and strong communication skills. Notably, 90% of reviews praised their ability to integrate solutions seamlessly into existing workflows and deliver projects on time.
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$25,000+$25 - $49 / hr250 - 999London, England
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See all 24 projectsPixelette Technologies is a leading blockchain development company, providing services like blockchain architecture, smart contract development, and decentralized application (DApp) development. Across reviews, 95% highlight exceptional project management and expertise in blockchain technology, with clients praising their proactive approach and adherence to deadlines. Notably, their work has helped clients secure substantial funding and achieve project goals efficiently.
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$25,000+$25 - $49 / hr50 - 249London, England
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See all 33 projectsTech Alchemy is a leading blockchain development company excelling in distributed ledger and cryptocurrency development, smart contract creation, and decentralized application (DApp) solutions. Approximately 100% of reviewers praise their deep industry expertise, proactive communication, and seamless project management. Clients commend their creativity and partnership approach, highlighting substantial project success and efficiency in meeting budget and timelines.
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$5,000+< $25 / hr1,000 - 9,999London, England
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See all 2 projectsERRNA offers services including Blockchain Development, Smart Contract Development, and Decentralized Application (DApp) Development. The client feedback highlights ERRNA's ability to deliver secure and effective blockchain solutions on time and within budget. Clients appreciate their professionalism, project management, and the high quality of their developed applications.
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$25,000+$25 - $49 / hr250 - 999London, England
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See all 121 projectsSuffescom Solutions Inc is a Blockchain Development company that reportedly failed to deliver a successful project for an arts, entertainment, and music company, leading to significant financial losses and ethical concerns. Feedback highlights a negative experience with 100% of reviewers indicating dissatisfaction, emphasizing issues with project execution, unethical practices, and poor communication.
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$10,000+$25 - $49 / hr250 - 999London, England
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See all 19 projectsSENLA is a versatile software development company offering services such as CRM solutions, data platform development, mobile and web app creation, and backend services. The overall feedback from reviews is overwhelmingly positive, with approximately 100% of clients highlighting SENLA's technical expertise, proactive communication, and cultural alignment. Reviewers frequently mention SENLA's strong project management skills, evidenced by on-time deliveries and effective collaboration. Overall, SENLA is recognized for its reliable partnership and commitment to client satisfaction.
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$10,000+$50 - $99 / hr10 - 49London, England
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See all 25 projectsDexola is a Blockchain Development company specializing in Blockchain Technology, Smart Contract Development, and Decentralized Application (DApp) Development. Feedback from reviews is overwhelmingly positive, with 100% of clients praising their expertise in merging traditional and blockchain solutions. Clients consistently highlight their timely project management and innovation, forming a strong reputation for delivering high-quality, client-focused blockchain solutions.
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$5,000+$50 - $99 / hr250 - 999Manchester, England
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See all 89 projectsInfograins Software Solutions is a Blockchain Development company specializing in Blockchain Technology, Distributed Ledger Development, and Smart Contract Development, providing innovative solutions for various industries. Clients consistently praise their technical expertise, strategic insights, and project management skills, with over 90% of reviews highlighting their ability to deliver on time and align development with business outcomes.
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$50,000+$50 - $99 / hr50 - 249London, England
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See all 18 projectsMad Devs is a technology solutions company offering services in software development, infrastructure modernization, and DevOps. Their reviews highlight a consistent pattern of excellence, with clients praising their project management, technical expertise, and responsiveness. Notably, 100% of the feedback emphasizes their ability to meet deadlines and deliver high-quality results. Clients also commend their transparent communication and proactive problem-solving approach. Mad Devs stands out for its resourcefulness and deep understanding of client needs, making them a reliable partner for complex tech projects.
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$25,000+$100 - $149 / hr10 - 49Chantry, England
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See all 7 projectsOn The Block Gaming is a dynamic game development company known for creating engaging, educational, and tailored gaming experiences. Approximately 100% of reviewers praise their exceptional project management, timely delivery, and user-centric approach. Clients consistently highlight their proactive communication and ability to transform visions into reality, noting a perfect alignment with company values and culture.
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$5,000+$25 - $49 / hr10 - 49London, England
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See all 2 projectsKingIT Solutions is a proficient blockchain development company specializing in Blockchain Technology and Distributed Ledger Development. They excel in delivering comprehensive Blockchain Solutions, including Smart Contract Development and Crypto Application Development. With a 100% positive feedback rate, clients consistently praise their professionalism, innovative approach, and ability to exceed expectations, making them a reliable partner for decentralized system development projects.
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$10,000+$50 - $99 / hr50 - 249London, England
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See all 18 projectsWeUno Technologies is a versatile software development company specializing in web and mobile app development, UX/UI design, and digital marketing. They are highly praised for their problem-solving skills and flexible project management, achieving timely and on-budget deliverables. Of the reviews analyzed, 100% were positive, highlighting personalized service, responsiveness, and alignment with client values.
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$5,000+< $25 / hr10 - 49London, England
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See all 22 projectsMifort is a Blockchain Development company that excels in integrating blockchain technologies into web and mobile applications. Reviews highlight their commitment to excellence, timely deliveries, and effective communication, with a 100% positive feedback rate. They are praised for enhancing UX and ensuring secure, immutable digital ledgers, making them a reliable partner for Blockchain Solutions and Decentralized Application (DApp) Development.
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$25,000+$50 - $99 / hr10 - 49London, England
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See all 5 projectsCyber Bee is a blockchain development company specializing in distributed ledger technology and smart contract development. Feedback from clients highlights their technical proficiency and commitment to delivering projects on time, with 100% positive reviews emphasizing their expertise in complex blockchain solutions and detailed documentation. Approximately 50% of reviewers noted the value-driven pricing as a key factor in choosing Cyber Bee.
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$10,000+$25 - $49 / hr50 - 249London , England
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See all 12 projectsWise Vision is a development company specializing in full-stack web and app development using technologies like Angular, Node.js, and JavaScript. Reviews indicate a high satisfaction rate, with 100% of clients praising their professionalism, communication, and innovative approach. Notably, clients commend their project management skills and timely delivery, with no areas for improvement identified by reviewers.
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$10,000+$50 - $99 / hr2 - 9Sheffield, England
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See all 8 projectsSVAIY ART is a company specializing in 3D animation, VR development, and metaverse creation. They are praised for their high-quality work, effective project management, and strong technical skills, with 100% of reviewers commending their communication and responsiveness. Clients appreciate their ability to meet deadlines and exceed expectations, making them a reliable choice for complex digital projects.
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$50,000+$25 - $49 / hr50 - 249Liverpool, England
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See all 2 projectsnextChainX is a Blockchain Development company renowned for its expertise in Smart Contract Development and solutions within blockchain technology. The company boasts a 100% positive feedback rate, with 50% of reviewers highlighting exceptional project management and communication skills. Clients appreciate nextChainX for delivering seamless user experiences and innovative blockchain solutions, aligning closely with client needs and expectations.
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$50,000+$50 - $99 / hr50 - 249London, England
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See all 6 projectsVodworks is a technology solutions company specializing in developing data platforms, analytics tools, and web infrastructure, often praised for providing good value for cost. Across their reviews, 100% of clients are impressed with their project management, meeting deadlines efficiently and offering high-quality technical expertise. Their collaborative approach and effective communication are frequently highlighted as key strengths, with no significant areas of improvement noted.
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$10,000+$25 - $49 / hr10 - 49London, England
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See all 4 projectsIT Dev Staff is a custom software development company specializing in full-stack web and platform development, providing backend and API development, UX design, and consultancy services. Reviewers consistently praise their timely delivery and effective communication, with 100% positive feedback highlighting their value for money and alignment with client values. Approximately 80% of reviewers commend their professionalism and dedication to project success.
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$10,000+$50 - $99 / hr50 - 249Oldham, England
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See all 2 projectsRock'n'Block is a blockchain development company specializing in smart contract security audits and cross-chain solutions. Client reviews highlight their reliability and experienced team, with 100% positive feedback on their fast and effective project management. They are praised for their dual expertise in security audits and development, offering comprehensive blockchain solutions.
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$10,000+$150 - $199 / hr50 - 249London, England
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See all 5 projectsMoonshot Partners is a versatile technology and digital solutions provider, excelling in areas such as product development, SEO strategy, and web design. Feedback indicates a high satisfaction rate, with over 90% of reviews highlighting their technical expertise, effective project management, and strong cultural alignment. Clients appreciate their innovative solutions and efficient communication, fostering successful collaborations.
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$10,000+$25 - $49 / hr50 - 249Twickenham, England
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See all 2 projectsINVINCIX Solutions Private Limited is a technology development company that provides technical expertise and product development services. With 100% of reviewers praising their alignment with business goals and timely delivery, clients also highlight the company's strong culture and work ethics. Areas for improvement include optimizing resource management.
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$10,000+$300+ / hr10 - 49London, England
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See all 2 projectsCrypto Legal is a company specializing in Blockchain Solutions, offering services such as regulatory guidance, compliance frameworks, and integration of blockchain technology. Reviews highlight their exceptional performance in aligning business models with regulatory standards and seamlessly integrating blockchain payment processors, with 100% of feedback noting their effective combination of legal and technical expertise. Clients appreciate their clear communication and comprehensive understanding of blockchain and regulatory requirements.
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$1,000+$50 - $99 / hr50 - 249London, England
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See all 4 projectsMadiff is a software development company specializing in enhancing legacy systems, particularly with .NET programming. The overall feedback highlights their ability to quickly provide skilled programmers at competitive prices, with a strong emphasis on commitment, efficiency, and professionalism. Approximately 100% of reviewers mention positive aspects, such as their impressive communication and integration within existing teams.
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$25,000+Undisclosed2 - 9Finchampstead, England
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See all 6 projectsMelmac Solutions Limited is a Blockchain Development company renowned for its expertise in blockchain technology and cybersecurity services. Clients consistently praise their project management, timely delivery, and tailored solutions. With 100% positive feedback, clients highlight their ability to reduce costs, enhance security, and improve efficiency through custom blockchain solutions, smart contracts, and distributed ledger technology.
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$5,000+$50 - $99 / hr10 - 49London, England
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See all 2 projectsBlackStack Labs is a Blockchain Development company, specializing in Smart Contract Development and Decentralized Application (DApp) Development. They received overwhelmingly positive feedback for their meticulous attention to detail and strong project management, with 100% of reviews noting effective communication and timeliness despite occasional delays. Their ability to quickly understand complex concepts was particularly highlighted by reviewers.
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$10,000+$25 - $49 / hr10 - 49London, England
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See all 10 projectsUASOFTDEV is a staff augmentation and custom software development company known for its rapid delivery and high-quality technical skills. Across their reviews, 100% of clients highlight their efficiency, professionalism, and ability to integrate seamlessly with existing teams, with no noted areas for improvement. They are praised for providing tailored solutions and exceptional project management.
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$1,000+$25 - $49 / hr10 - 49London, England
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See all 2 projectsPLAYM8.GAMES is a game development company specializing in gameplay engineering and Unreal Engine projects. Reviews indicate a high level of satisfaction, with 80% of feedback highlighting timely delivery and effective communication. However, 20% suggest improvements in proactive communication and understanding of the project’s big picture.
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$5,000+$50 - $99 / hr50 - 249Kington, England
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Software development firm Oceanstart was launched in 2010. The company specializes in Custom Software Development and Web Development, and is midsize.
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$5,000+Undisclosed2 - 9London, England
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Plantec, a software development company, was established in 2022. The team focuses on Custom Software Development and Market Research.
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$5,000+$100 - $149 / hr10 - 49Salford, England
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Avark is a branding company. Located in Salford, England, the team specializes in Branding and Web Design.
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$5,000+$25 - $49 / hr50 - 249London, England
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Shivacha Technologies is a Blockchain company. Their midsize team of employees is headquartered in Gurugram, India and Dallas, Texas. Their team offers Blockchain and AI Consulting.
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$10,000+$25 - $49 / hr10 - 49London, England
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See all 1 projectsWhatdahack?! 👨💻🦾 🧠⌚🚀💸🏆 offers a range of Blockchain services, including Blockchain Development, Smart Contract Development, and Decentralized Application (DApp) Development. The reviews consistently highlight their technical proficiency, robust security measures, and effective use of advanced tools like AI and no-code platforms to deliver efficient, scalable solutions. Clients commend their agile project management and deep expertise in Blockchain Technology.
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$5,000+$100 - $149 / hr2 - 9London, England
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Waterwhip Labs is a web development firm. The team offers Web Development and Custom Software Development, and the company is in London, England.
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UndisclosedUndisclosed50 - 249London, England
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Launched in 2018, Ramp is a Blockchain company. The midsize team offers Blockchain and Blockchain Marketing.
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UndisclosedUndisclosed50 - 249London, England
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Launched in 2021, TriliTech Limited is a Blockchain company. Their team focuses on Blockchain.
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$1,000+$50 - $99 / hr10 - 49London, England
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Established in 2020, Core Devs Ltd is a small Dubai, United Arab Emirates-based software development company. Their team provides Custom Software Development and Blockchain.
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$1,000+$25 - $49 / hr10 - 49Birmingham, England
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See all 1 projects0xHearts specializes in website design, offering modern, visually appealing, and user-friendly designs that align with brand values. Clients appreciate the quality of their work and view them as providing good value for cost. While there was a minor delay in delivery, the overall feedback is highly positive, recommending 0xHearts for enhancing online presence.
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$1,000+$100 - $149 / hr2 - 9London, England
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Established in 2022, Logicful is a small custom software development company. Their services include Custom Software Development and Blockchain.
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$1,000+$50 - $99 / hr10 - 49Manchester, England
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Havilah Blockchain Studios is a Blockchain company. Located in Awka, Nigeria, their small team specializes in Blockchain and Branding. The agency was established in 2022.
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Undisclosed$50 - $99 / hr2 - 9London, England
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Augment Blockchain is a London, England-based Blockchain company. They offer Blockchain and Blockchain Marketing.
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$5,000+$25 - $49 / hr2 - 9London, England
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SoftSyncDev is an UX design agency. The Karachi, Pakistan-based team focuses on UX/UI Design and Custom Software Development.
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$5,000+$25 - $49 / hr2 - 9London, England
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InWings LTD is a small London, England-based Blockchain company. Their services include Blockchain and Custom Software Development.
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UndisclosedUndisclosed10 - 49London, England
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Blockchain company Cryptosec provides Blockchain and Cybersecurity. They are in London, England.
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$10,000+$100 - $149 / hr2 - 9London, England
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0xLabs.dev is a Blockchain company. They are headquartered in London, England. Their team offers Blockchain.
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UndisclosedUndisclosed2 - 9London, England
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ALTERSIDE, a Blockchain company, focus on Blockchain and AR/VR development. They were founded in 2022.
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UndisclosedUndisclosed2 - 9London, England
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BLOCK21, a Blockchain company, focuses on Blockchain and Blockchain Marketing. The company is based in London, England.
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UndisclosedUndisclosed2 - 9London, England
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HAXR is a Blockchain company. The London, England-based company was established in 2021. Their services include Blockchain and Cybersecurity.
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UndisclosedUndisclosed2 - 9London, England
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Space Lion Ventures is a Blockchain company. Their small team is located in London, England. Their services include Blockchain and UX/UI Design.
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UndisclosedUndisclosed2 - 9London, England
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Blockchain company UWorld is in London, England. They focus on Blockchain and Custom Software Development.
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List of the Top United Kingdom Web15 Development Companies
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$25,000+$25 - $49 / hr50 - 249London, England
Ability to deliver
36.5/40.017.2/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
40% Blockchain30% Web360% Other -
$5,000+< $25 / hr1,000 - 9,999London, England
Ability to deliver
32.9/40.016.2/20 Reviews9.7/10 Clients & Experience7/10 Market PresenceService focus
60% Blockchain20% Web340% Other -
$25,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
39.6/40.019.6/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
10% Blockchain15% Web390% Other -
$25,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
35.3/40.020/20 Reviews9/10 Clients & Experience6.2/10 Market PresenceService focus
10% Blockchain40% Web390% Other -
$10,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
36.5/40.017.6/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
15% Blockchain20% Web385% Other -
$10,000+$50 - $99 / hr10 - 49London, England
Ability to deliver
34.9/40.017.8/20 Reviews9.1/10 Clients & Experience8/10 Market PresenceService focus
70% Blockchain20% Web330% Other -
$25,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
34.1/40.016.4/20 Reviews10/10 Clients & Experience7.7/10 Market PresenceService focus
20% Blockchain20% Web380% Other -
$5,000+$50 - $99 / hr250 - 999Manchester, England
Ability to deliver
30/40.020/20 Reviews10/10 Clients & Experience0/10 Market PresenceService focus
30% Blockchain30% Web370% Other -
$50,000+$50 - $99 / hr50 - 249London, England
Ability to deliver
35.5/40.016/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
15% Blockchain15% Web385% Other -
$25,000+$100 - $149 / hr10 - 49Chantry, England
Ability to deliver
32.2/40.016.6/20 Reviews8.8/10 Clients & Experience6.8/10 Market PresenceService focus
10% Blockchain70% Web390% Other -
$5,000+$25 - $49 / hr10 - 49London, England
Ability to deliver
31.3/40.016/20 Reviews10/10 Clients & Experience5.3/10 Market PresenceService focus
85% Blockchain15% Web315% Other -
$10,000+$50 - $99 / hr50 - 249London, England
Ability to deliver
31.6/40.016.2/20 Reviews10/10 Clients & Experience5.4/10 Market PresenceService focus
20% Blockchain30% Web380% Other -
$5,000+< $25 / hr10 - 49London, England
Ability to deliver
31.9/40.016.6/20 Reviews10/10 Clients & Experience5.3/10 Market PresenceService focus
25% Blockchain30% Web375% Other -
$25,000+$50 - $99 / hr10 - 49London, England
Ability to deliver
28.9/40.016.8/20 Reviews6.7/10 Clients & Experience5.3/10 Market PresenceService focus
50% Blockchain30% Web350% Other -
$10,000+$25 - $49 / hr50 - 249London , England
Ability to deliver
30.1/40.016.4/20 Reviews8.6/10 Clients & Experience5.2/10 Market PresenceService focus
15% Blockchain30% Web385% Other -
$10,000+$50 - $99 / hr2 - 9Sheffield, England
Ability to deliver
34.1/40.016.4/20 Reviews9.5/10 Clients & Experience8.2/10 Market PresenceService focus
10% Blockchain10% Web390% Other -
$50,000+$25 - $49 / hr50 - 249Liverpool, England
Ability to deliver
25.7/40.016.8/20 Reviews4.9/10 Clients & Experience4/10 Market PresenceService focus
40% Blockchain35% Web360% Other -
$50,000+$50 - $99 / hr50 - 249London, England
Ability to deliver
30.9/40.016.6/20 Reviews8.5/10 Clients & Experience5.8/10 Market PresenceService focus
10% Blockchain25% Web390% Other -
$10,000+$25 - $49 / hr10 - 49London, England
Ability to deliver
30.5/40.017/20 Reviews9.5/10 Clients & Experience4/10 Market PresenceService focus
10% Blockchain20% Web390% Other -
$10,000+$50 - $99 / hr50 - 249Oldham, England
Ability to deliver
23.9/40.016.2/20 Reviews1.8/10 Clients & Experience6/10 Market PresenceService focus
100% Blockchain20% Web3 -
$10,000+$150 - $199 / hr50 - 249London, England
Ability to deliver
24.6/40.016/20 Reviews3.2/10 Clients & Experience5.4/10 Market PresenceService focus
10% Blockchain50% Web390% Other -
$10,000+$25 - $49 / hr50 - 249Twickenham, England
Ability to deliver
25.7/40.016/20 Reviews4.5/10 Clients & Experience5.2/10 Market PresenceService focus
10% Blockchain30% Web390% Other -
$10,000+$300+ / hr10 - 49London, England
Ability to deliver
24.7/40.016.6/20 Reviews0/10 Clients & Experience8.1/10 Market PresenceService focus
35% Blockchain20% Web365% Other -
$1,000+$50 - $99 / hr50 - 249London, England
Ability to deliver
26.1/40.016.2/20 Reviews4.7/10 Clients & Experience5.2/10 Market PresenceService focus
10% Blockchain25% Web390% Other -
$25,000+Undisclosed2 - 9Finchampstead, England
Ability to deliver
24.9/40.016.2/20 Reviews2.9/10 Clients & Experience5.8/10 Market PresenceService focus
35% Blockchain20% Web365% Other -
$5,000+$50 - $99 / hr10 - 49London, England
Ability to deliver
20.4/40.016.4/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
60% Blockchain35% Web340% Other -
$10,000+$25 - $49 / hr10 - 49London, England
Ability to deliver
24.5/40.017/20 Reviews2.9/10 Clients & Experience4.6/10 Market PresenceService focus
10% Blockchain30% Web390% Other -
$1,000+$25 - $49 / hr10 - 49London, England
Ability to deliver
18.8/40.014.8/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
10% Blockchain30% Web390% Other -
$5,000+$50 - $99 / hr50 - 249Kington, England
Ability to deliver
10.2/40.00/20 Reviews5.3/10 Clients & Experience4.9/10 Market PresenceService focus
20% Blockchain90% Web380% Other -
$5,000+Undisclosed2 - 9London, England
Ability to deliver
13.3/40.00/20 Reviews9.3/10 Clients & Experience4/10 Market PresenceService focus
10% Blockchain100% Web390% Other
U.K. Web3 Development FAQs
A U.K. partner brings proximity to London’s fintech ecosystem, access to venture networks, and familiarity with FCA guidance, crypto-asset promotions rules, and data protection standards. Teams here are also plugged into European and global talent, with strong ties to universities known for cryptography, distributed systems, and security research.
If you plan to integrate with U.K. banks, PSPs, or regulated service providers, a local team can align technical architecture and documentation to support compliance reviews. Many firms also offer bilingual or multi-market support for European expansion.
Prices vary thanks to a number of factors, including scope, chain, and security needs. According to Clutch’s verified data, typical U.K. ranges go:
- Hourly: £70 – £160
- MVP smart contract or simple dApp: £25,000 – £80,000
- Complex DeFi/NFT marketplace, multi-chain, audits, and integrations: £100,000 – £400,000+
Other variables that may impact costs include security depth, chain complexity, compliance, and integrations. Make sure you ask for a detailed breakdown of costs to ensure transparency and avoid unnecessary expenses.
U.K.-based Web3 developers work across a vast array of industries and niches. Clients can often find specialists supporting:
- Financial services and fintech — DeFi protocols, tokenized assets, on-chain payments
- Gaming and entertainment — Web3 gaming economies, NFTs, digital collectibles
- Supply chain and logistics — Provenance tracking, asset tokenization
- Media and IP — Royalty distribution, creator monetization
- Energy and sustainability — On-chain carbon credits, renewable marketplaces
- Public sector and research — Pilots and sandboxes with universities and consortia
You’ll also find decentralized app developers in the U.K. specializing in identity, healthcare data exchange, and DAO tooling.
Explore Clutch’s vetted directories to find trusted firms. Use this quick checklist as you evaluate potential partners:
- Code transparency — Review public repos, commits, and contributor history.
- Security posture — Ask for audit reports, test coverage, bug bounty processes, and incident playbooks.
- Chain expertise — Confirm experience with your target stack (e.g., Solidity/EVM, Rust/Solana, Move/Aptos).
- Production track record — Look for live mainnet launches, TVL/volume metrics, and uptime data.
- Compliance fluency — Familiarity with regional data standards and crypto communications rules.
- Team model — Clarify who codes (in-house vs. subcontractors) and seniority mix.
- Delivery rigor — Roadmaps, sprint cadence, QA, and sign-off criteria.
- References — Verified reviews and U.K.-based client references on Clutch.
If your goal is to hire a smart contract developer in the U.K. or a full Web3 development company in the U.K., start with a small discovery sprint to validate fit before committing to full build phases.
- No verifiable audits or unwilling to discuss security practices
- Vague tokenomics or promises of guaranteed ROI
- Limited on-chain testing or no testnet/mainnet release history
- Inability to explain gas optimization, re-entrancy, oracles, MEV risks
- Overreliance on closed-source code for critical contracts
- Poor documentation and unclear IP/ownership terms
- Unfamiliarity with U.K. data protection or financial promotions requirements
- Unrealistic timelines or all-senior staffing proposals at below-market rates
Underestimating red flags can cause more than a simple headache. Take a moment to carefully assess the team and do a background check so you don’t miss any of these warning signs.