Top Private Blockchain Development Companies in UK
SelectedFirms reviews agencies and verifies client feedback to support informed decisions. [How SelectedFirms Ensures Trust]
Explore Reviewed Private Blockchain Development Companies in UK — Find Skilled Private Blockchain Developers for Your Project
Certain agencies may be featured through sponsored placements. Rankings and SF Scores remain unbiased and are based solely on our evaluation methodology.
14 Companies
Filter by
-
UK
4.9 (16 Reviews)
58
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
58
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Engineering peace of mind
Vention is a global software development company with over 20 years of experience delivering innovative, scalable solutions for startups and large enterprises. We handle projects of any size and complexity, enabling clients to accelerate growth, launch new products, and seize emerging opportunities. With a global network of 3,000+ experienced developers, we provide top engineering talent aligned to your time zone, technology stack, and business goals. We’ve partnered with 500+ industry-leading organizations, including PayPal, IBM, Mount Sinai, PwC, and Postman, contributing to more than $15B in client acquisitions. Our engagement model helps companies reduce operational costs by up to $600K annually, while our long-term relationships—averaging over 36 months and extending up to 16 years—reflect strong client trust and satisfaction. Vention offers full-cycle software development services, from strategy and architecture to deployment and optimization. Our capabilities include custom software development, web and mobile app development, QA and testing, cloud and DevOps, eCommerce platforms, AR/VR experiences, artificial intelligence, and blockchain solutions. As a trusted technology partner, Vention empowers businesses to innovate faster, scale efficiently, and stay competitive in an evolving digital landscape.
See all 9+ Portfolios
Undisclosed/hr
$25,000+
1,000 - 3,000
London, UK
Verified Client Review
Mobile App Dev for Sports Tracking Platform
Reviewed by: Brent Varrall, Founder at AllGains View all 16 Reviews
5.0 (17 Reviews)
55
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
55
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Redefining Software Design and Development with AI
Debut Infotech is an AI-augmented blockchain and software development company helping organizations across financial services, healthcare, supply chain, and digital platforms build systems that perform reliably in complex, regulated environments. Founded in 2011 and blockchain-native since 2015, the company brings engineering discipline and technology depth to enterprises moving from fragmented pilots to production-grade systems. With delivery centers across the USA, UK, Canada, and India, Debut Infotech combines regional market understanding with globally distributed engineering capability — enabling clients to move with speed, consistency, and governance. Service Areas Enterprise AI and generative AI — LLM integration, AI agents, RAG pipelines, and intelligent process automation Blockchain and Web3 — smart contracts, DeFi protocols, RWA tokenization, exchange infrastructure, and enterprise blockchain on Hyperledger Fabric and Corda Mobile — native iOS, Android, and cross-platform applications built for enterprise security and scale Web and software — full-stack platforms, SaaS products, and API-first enterprise systems Proven Delivery: $62M+ raised across client platforms including Ifinca, IntegraLedger, Everledger, and T?M 90% customer success score across enterprise engagements 15 years of enterprise software delivery Fortune 500 clients and high-growth startups across 25+ industry verticals 50–249 engineers spanning AI, blockchain, and software disciplines
See all 9+ Portfolios
$25-$49/hr
$10,000 - $24,998
50 - 100
Oxford, UK
Verified Client Review
Excellent Real World Asset Tokenization Development Services by Debut Infotech
Reviewed by: Megan Parrish, Manager View all 17 Reviews
4.8 (8 Reviews)
52
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
52
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Your Technology Partner
SDLC Corp is a full-spectrum software development and technology company founded in 2015 and headquartered in Illinois, USA. With 600+ completed projects and a team of 400+ professionals. We build, modernize, and scale secure digital systems for businesses at every stage from large enterprises managing complex technology programs to growing mid-sized companies and startups. SDLC Corp covers the complete Software Development lifecycle from the first line of code to long-term engineering continuity. Custom software development Web and mobile application development Enterprise AI Odoo ERP and Salesforce CRM implementation Game development iGaming Cloud and DevOps UI/UX design Digital transformation consulting Every service is delivered by dedicated practice teams with deep and niche-specific expertise. We operate with a global delivery presence across the USA, UK, UAE, India, Australia, and Canada, supported by engineers, solution architects, ERP consultants, AI specialists, Unreal Engine and Unity game developers, DevOps engineers, QA professionals, and technology consultants. For enterprises, we handle large-scale software programs, clients like Transworld, Kiss USA, Equity Builders, Wadiaa, Orange Telecom, Huawei, ADTS, Airavat, Zilch and much more. Beyond client projects, SDLC Corp builds and ships its own software products including AI-powered document processing, DAN, 20+ Odoo Connectors, Pulastya, Foresite Praxis AI and business intelligence tools validating our engineering standards against real production demands. Our Odoo ecosystem catalog includes through turnkey products, white-label solutions, custom development, dedicated development teams, staff augmentation, and long-term product maintenance models. Clients retain full ownership of source code and intellectual property We serve clients across fintech, healthcare, gaming, eCommerce, logistics, manufacturing, real estate, SaaS, and education. Clients retain full ownership of source code and intellectual property. SDLC Corp supports scalable architecture, secure development practices, integration readiness, and post-launch engineering continuity across every engagement.
See all 36+ Portfolios
$25-$49/hr
$25,000 - $50,000
100 - 500
Holbrooks, UK
Verified Client Review
4.9 (8 Reviews)
39
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
39
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
De[coding] Capabilities
Ezulix is a custom AI software development company specializing in engineering hyperautomation solutions across all business industries. Certified as a CMMI Level 5 IT company, Ezulix caters to the digital transformation and overall IT operations needs of enterprises, startups, SMBs, and large corporations. It uses a consulting-first approach and carefully analyzes the existing workflows of a business, strategizes a step-by-step automation roadmap, and curates an AI-powered business process automation solution for businesses, helping businesses reduce manual workload at speed and scale with intelligent workflows. In addition to business software solutions, Ezulix also specializes in first-of-its-kind mobile app development. It fulfils unique app development requirements with dedicated app development teams.
View Ezulix Software Profile
Undisclosed/hr
$7,000+
50 - 100
London, UK
Verified Client Review
Mobile App & Web Revamp & Maintenace for Car Manufacturer
Reviewed by: Bob Laishley, CEO at Caterham View all 8 Reviews
0.0 (0 Reviews)
38
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
38
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Built for Traders,By Traders
Moneda is a leader in trading technology and automated systems, founded on a commitment to integrity and innovation. We deliver a full suite of transparent, data-driven solutions, including institutional-grade strategies and highly efficient automated trading tools. Our ecosystem supports over 2,000 members with expert community support and a clear path for financial expansion.
View monedafx Profile
$25-$49/hr
$500+
20+
Kensington, UK
0.0 (0 Reviews)
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Enterprise Mobile App Development Company
Junkies Coder is a leading technology solution provider across 15 countries and 50+ Rockstar Developers is our strength, We're specializing in web development Excellence, Top-rated Mobile App Development, Top-rated Android App Development, Top-rated iOS App Development, Top-rated Wearable App Development, Trusted Blockchain Development and innovative solutions. Our experienced team is dedicated to delivering high-quality service and support to help businesses achieve their goals. With a passion for technology and a commitment to delivering impactful results, we have the expertise and resources to streamline operations and drive success. Trust Junkies Coder for your technology needs and Hire Mobile App Developers. Junkiescoder stands at the forefront of innovation, specializing in crafting stellar Mobile apps, captivating Web Applications, and sophisticated enterprise custom solutions. We excel in tailoring, enhancing, and seamlessly integrating intricate enterprise-grade systems, empowering businesses with insightful analytics, and pioneering cutting-edge web and mobile innovations. Boasting a rich legacy of over a 8+ years, our endeavors have catered to a diverse clientele spanning individuals, burgeoning startups, and esteemed organizations alike. At Junkiescoder, our adept team continually surges forward, honing their skills to keep pace with the dynamic industry landscape. From Blockchain to E-Learning, from IoT to Artificial Intelligence, from Machine Learning to SaaS, from Augmented Reality to Virtual Reality, the spectrum of our expertise knows no bounds. Our seasoned development squad has not only mastered these domains but also perpetually evolves alongside industry advancements. Let our achievements speak volumes; delve into our illustrious portfolio and peruse the glowing testimonials from our esteemed clients on our website. With Junkies Coder, you can trust that your technology needs are in good hands. What is the estimated timeline and cost for developing our website or mobile app? The estimated timeline and cost for developing your website or mobile app will depend on various factors such as project complexity, required features, design customization, and integration needs. We will analyze your specific requirements and provide you with a detailed timeline and cost proposal tailored to your project. Can you assist with integrating third-party services or APIs into our websites or mobile apps? Yes, we can assist with integrating third-party services or APIs into your websites or mobile apps. we have experience in seamless integration to enhance the capabilities of your digital products. What is our approach to quality assurance and testing during the development process? Our approach to quality assurance and testing is comprehensive. We follow industry best practices and conduct thorough testing at different stages of development to ensure the functionality, performance, and reliability of your website or mobile app. How we handle ongoing support, maintenance, and updates for the websites and mobile apps after the initial development? We provide ongoing support, maintenance, and updates for websites and mobile apps. Our team is available to address any issues, implement updates, and provide technical assistance to ensure your digital products continue to operate smoothly and remain up-to-date.
View Junkies Coder Profile
< $25/hr
$5,000 - $25,000
15 - 20
London, UK
0.0 (0 Reviews)
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Your Digital Partner
SDNA Tech transforms concepts into real-world applications that are scalable, dependable, and appealing to consumers. We are inspired by your ideas and want to help you bring it to life.
View SDNA Tech Profile
< $25/hr
$10,000 - $15,000
100 - 1,501
London, UK
5.0 (5 Reviews)
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
28
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Unlock Tomorrow
This IT-leader provides qualified assistance in designing smart products and adopting the latest technology innovations. In less than a decade, Computools has become a major player in global markets and currently excels at coming up with the best solutions in cross-platform mobile app development. The other sides of Computools’s business activity touch upon the IoT, VR & AR, Fintech, Consulting and Consumer services, and game software development. The company’s approach involves customized consulting during which the client has an opportunity to get a tailor-made solution that fits their high-level goals and business ambitions best. Computools’s brand has been repeatedly awarded for deep expertise and excellent digital solutions many of which were produced in association with numerous European and international enterprises.
View Computools Profile
$25-$49/hr
$50,000+
50 - 249
UK
Verified Client Review
Custom Software Development for System Integrator
Reviewed by: Tokio Kuwamura, Director at Sakura-Communication View all 5 Reviews
4.6 (2 Reviews)
25
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
25
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Make your ideas fly high with us.
Design Zilla, an AI-powered development consultancy, specializes in data-driven products and solutions for SMEs, focusing on end-to-end development. Established in 2019, they excel in AI use cases and development consultancy across various industries.
View Design Zilla Profile
$50-$99/hr
$25,000+
10 - 49
Dundee, UK
Verified Client Review
Web Dev, Design & Branding for Design Agency
Reviewed by: Shajjar Abbas Khan, Founder at Deminimalist.agency View all 2 Reviews
5.0 (1 Reviews)
5.0 (1 Reviews)
22
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
22
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Outsource Innovations
Rendmate is an IT solutions provider that fosters clients' ideas into successful products, focusing on creativity, competence, and commitment. They offer services like product design, hardware and software architecture, and analysis. Rendmate's success is measured by their clients' success, spanning multiple business sectors.
View Rendmate Profile
$50-$99/hr
$25,000+
50 - 249
London, UK
Verified Client Review
Web Design for e-Commerce
Reviewed by: Boris Kagan, Senior Manager at Superior Promos View all 1 Reviews
4.8 (1 Reviews)
22
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
22
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Delivering Goals
InnotatzIT Solutions focuses on helping businesses transition from digital thinking to digital being, offering enterprise-wide automation using Salesforce platforms, delivering a fast-paced transformational experience, and building trust with clients. They believe effective solutions are created through collaboration and a focus on excellence.
View InnotatzIT Solutions Profile
$25-$49/hr
$10,000+
10 - 49
Harrow, UK
Verified Client Review
Custom Software Development for IT Service Company
Reviewed by: Christopher D'souza, Project Delivery Head at Aartechso Solutions View all 1 Reviews
0.0 (0 Reviews)
20
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
20
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Transforming AI into tangible business value
Halo is a London-based R&D organization that focuses on delivering high value outcomes with AI. They have an in-house team of industry experts who identify market trends and develop innovative solutions. They also focus on design, focusing on experience and robust engineering principles. Halo has over 10 years of experience working with clients globally in AI, Machine Learning, Cloud, and Data Science.
View Halo Technology Lab Ltd Profile
$150-$199/hr
$25,000+
10 - 49
London, UK
0.0 (0 Reviews)
0.0 (0 Reviews)
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Empower your business with our expertly crafted bespoke software
Twin3's diverse IT and software development experience allows them to efficiently solve problems and build new applications, enabling them to solve problems at an accelerated pace.
View Twin3 Profile
$25-$49/hr
$50,000+
10 - 49
Loughborough, UK
0.0 (0 Reviews)
12
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
12
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
transform ideas into Digital Solution
Akxens Inc. is a premier enterprise software engineering firm redefining the standards of digital transformation by bridging the critical gap between boutique agility and institutional scale. We specialize in architecting high-performance digital infrastructure—from custom ERP and CRM ecosystems to scalable SaaS platforms and secure financial ledgers—delivered with a "Zero-Latency" execution model. Unlike traditional outsourcing agencies, Akxens operates as a sovereign venture technology partner, deploying elite, pre-vetted engineering squads to convert complex business visions into robust, future-proof assets.
View Akxens Profile
$25-$49/hr
$1,000 - $50,000
50 - 150
London, UK
Why Companies Trust SelectedFirms?
SelectedFirms bridges the gap between businesses and digital service providers as a trusted B2B research and listing platform. With the trust of 14,000+ companies and a growing community of 1M+ users, we empower businesses with reliable insights to make confident decisions.
Human-verified companies
We manually review companies to ensure they meet our quality standards before they appear on the platform.
Research-driven rankings
We rank companies using a clear ranking methodology based on real client feedback, expertise, market credibility, and how well teams execute — not hype.
Always up-to-date insights
We regularly refresh listings with new reviews, portfolio updates, and market changes to keep decisions relevant.
Verified credibility signals
From verified badges to editorial reviews, we highlight companies that show real commitment to quality and transparency.
