Top Outsourcing Software Development Companies in UK
SelectedFirms reviews agencies and verifies client feedback to support informed decisions. [How SelectedFirms Ensures Trust]
Explore Reviewed Outsourcing Software Development Companies in UK — Find Skilled Outsourcing Software 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.
53 Companies
Filter by
-
UK
1
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
SYNCRONISING BUSINESS WITH TECHNOLOGY
Synycs Group is a London-based digital strategy and software development consultancy delivering end-to-end IT infrastructure management, search engine optimization, and custom application development services. Founded in 2014 and headquartered in the UK with additional operations across multiple countries, Synycs Group specialises in digital strategy, IT managed services, UX/UI design, and cloud computing solutions tailored to each client's technology goals. The agency's cross-functional team combines cognitive services such as AI and machine learning with practical business consulting, helping organisations streamline IT operations and improve customer experience. Synycs Group supports clients across banking, healthcare, education, manufacturing, and telecom industries, offering services spanning application development, infrastructure management, cybersecurity, and quality assurance. With a global footprint across the UK, India, and Australia, the firm positions itself as a one-stop technology partner for businesses seeking to synchronise digital strategy with scalable software solutions. Companies looking for a dependable digital strategy and SEO-focused development partner will find Synycs Group's broad service portfolio well suited to enterprise and mid-market technology needs.
View Synycs Group Profile$25-$49/hr
$1,000+
50 - 249
London, UK
1
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Empowering Businesses with Cutting-Edge IT and Cyber Security Solutions
Seriun is a Lancashire-based managed IT and cybersecurity provider delivering BI and big data consulting alongside comprehensive cyber security, managed IT support, and business telecoms solutions. With over 20 years of industry experience and CREST and Cyber Scheme accreditations, Seriun offers penetration testing, dark web monitoring, phishing training, vulnerability management, and Cyber Essentials Plus certification support to help businesses strengthen their security posture. The company's IT managed services extend to cloud solutions, virtual CTO consulting, hosted phone systems, and connectivity, giving clients a single technology partner for infrastructure, security, and communications. Seriun's customer-centric, partnership-style approach is particularly valued by ambitious businesses operating in specialist sectors requiring strict compliance standards. With over 150 years of combined team expertise and a growing presence across the North West of England, Seriun continues to expand its cyber security and managed services capabilities. Businesses seeking a trusted cybersecurity and BI consulting partner will benefit from Seriun's proactive, people-focused approach to technology and security.
View Seriun ProfileN/A
$1,000+
10 - 49
Burnley, UK
1
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Secure-by-Design Mobile & Web App Developers
Swipe & Tap is a Leicester-based mobile app and web development agency specialising in secure-by-design software for startups, SaaS providers, fintech, and healthcare organisations. Founded in 2005, the company builds native iOS and Android applications alongside scalable Laravel web platforms, following OWASP and ISO 27001-aligned security practices throughout the development lifecycle. Swipe & Tap's small, hands-on team works directly with clients from concept through launch and ongoing maintenance, offering custom software development, API integration, and bespoke admin portal builds without layers of account management. The agency has supported clients in achieving ISO 27001 certification while delivering secure, scalable software solutions that underpin business growth. With more than a decade of experience in mobile app development and web development, Swipe & Tap positions itself as an alternative to agencies that prioritise speed over security and long-term reliability. Organisations seeking a UK mobile app development partner focused on secure, enterprise-grade software, backed by transparent communication and confidentiality guarantees, will find Swipe & Tap a strong fit for complex digital products.
View Swipe & Tap Profile$100-$149/hr
$10,000+
2 - 9
Leicester, 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.