Ranked · 114 of 132 assessed
Ordered by Agency List ScoreCustom software, cloud infrastructure, and data engineering for fintech and healthcare
Transforms technology for tangible results and customer engagement
Custom software, dedicated teams, and data engineering for healthcare, finance, and logistics
Customizable content management for arts, culture, and heritage
Application development, cloud architecture and testing for differentiating software products
Bespoke software and AI solutions with digital marketing expertise
Creative design, web development, and strategic marketing solutions
Custom web and mobile software built on AWS for global brands and infrastructure
Custom software development and AI solutions for digital transformation.
Custom software development for diverse industries worldwide
Bespoke software and database solutions for global businesses
Delivers digital transformation through AI, cloud, and data solutions.
Enterprise software development and digital strategy for global brands
Enabling growth with bespoke digital platforms and AI solutions
Bespoke software solutions for CRM and workflow management
Specialists in SaaS platforms and systems integration
Custom LMS development, integrations, and migrations for regulated training organizations
Full-stack engineering, machine learning, and SEO for Leeds-based clients
SEO and PPC services for inbound lead capture and search visibility
Software development for entrepreneurs and innovators
Software engineering and product design for global brands
Custom software and mobile app development for digital transformation
Development and dev services for inbound lead capture and search visibility
Digital transformation and health solutions for global challenges
Bespoke software for businesses that quote, build, and deliver
Technology transformation partner for AI and data strategy
Delivers scalable software solutions for e-commerce and finance.
Creating digital products with UX design and mobile app development
Custom software development for membership platforms and AI solutions
Bespoke software solutions for capital markets and government sectors
Safety management software and drone surveys for diverse industries
Bespoke software solutions for healthcare and financial industries.
Bespoke Software Development and Quality Assurance
Custom crowdfunding platforms with compliance and post-launch support
Build dedicated R&D teams and scale software development
MVP development and SaaS platforms for startups and digital businesses
Custom software and e-commerce solutions for global businesses
Bespoke software solutions for business challenges and efficiency
Transforming markets with secure software and AI solutions
Designing and developing healthcare technology solutions for digital transformation
Dedicated product development for mobile apps and AI solutions
Agile digital services with user-centred design and development
Bespoke software development, cloud architecture, and QA testing since 2004
Low-code and AI-powered web and mobile app development
Bespoke web, mobile, and software development for startups and enterprises
Designs and builds digital products for public and private sectors
Custom software solutions with AI and data innovation
Digital product development, systems integration, and cloud-native infrastructure for enterprises and startups
Healthcare software development and digital health solutions
Bespoke software and AI solutions for diverse industries
Custom software development for fintech and IoT industries
Next-generation IT and telecom services for diverse industries
Custom software development for maritime and renewable energy sectors
Solves complex business problems with technology and design.
Bespoke software and mobile apps for diverse industries
Bespoke software development and IoT integration solutions
Data and analytics solutions with Microsoft Fabric expertise
Bespoke software development and AI consultancy for diverse industries
Engineering digital experiences for banking and media industries
Software development, UX design and mobile apps for Birmingham businesses
Custom software and mobile app development for global brands
Bespoke CRM and ERP Systems for Streamlined Business Operations
Web platforms, e-commerce and cloud infrastructure for enterprise clients since 2004
Custom Software Development and AI Services with Generative AI Integration
Custom software and AI solutions for financial and retail sectors
AI-powered digital transformation and self-service solutions
High assurance custom software design, development, and support from a UK-based team
Transforming businesses with AI, blockchain, and cybersecurity solutions
Bespoke software and digital transformation for competitive advantage
Backend and frontend teams for iOS, Android, and web builds
AI and cloud solutions for healthcare and beyond
Framework-driven rapid application development, legacy modernisation, and OSCP-backed security expertise
Custom software and mobile app solutions for business challenges
Bespoke software development and agile consultancy services
Bespoke software solutions for non-technical businesses in the UK
Digital transformation, cloud accounting, and payroll systems built for hospitality operators
Bespoke software development for healthcare, education, and legal sectors
User experience design and software development for positive change
Custom software and cloud infrastructure for digital transformation
Bespoke software and digital marketing for diverse industries
AI-enhanced software development with Microsoft and React expertise
IBM i support and development for business-critical applications
Creating digital experiences with AI and connected solutions
Bespoke software development and project management in the UK
Crafts games and immersive experiences with VR and AR technology.
Custom software solutions for diverse industries and business automation
Web and mobile app development with bespoke solutions
Designs AI-native software for scalable, secure enterprise solutions
Custom software and mobile app development for diverse industries
Custom software development for digital products and enterprise platforms
Delivers websites, software, and mobile app development
Custom software solutions for telematics and systems integration
Web design and development with creative and strategic expertise
Bespoke software development and digital transformation audits
Empowering digital transformation with bespoke software and cloud solutions
Application development, cloud architecture and data engineering across banking, healthcare and travel
Showing the top 96 of 114 ranked agencies.
Also in United Kingdom · 29 not ranked here
11 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 114 of the 132 assessed custom software development agencies in United Kingdom — the ones carrying a published score — out of 143 listed.
The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.
Cohorts and awards
Agencies are compared within a cohort — here, Custom Software Development in United Kingdom. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 132, so the strongest award available here is top 5%.
The 11 custom software development agencies not yet assessed are listed on this page but not ranked.
A further 18 were assessed and no published evidence of their work was found, so no score is shown for them.
Paid placement
Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.
Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.
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Questions
- How many custom software development agencies are in United Kingdom?
- 143 are listed on Agency List in United Kingdom. 132 of them have been assessed on the Agency List Score as of October 2026, and 114 of those carry a published score.
- Which custom software development agency in United Kingdom is ranked highest?
- SPD Technology, with an Agency List Score of 97.7, ranks #1 of 132 assessed agencies in Custom Software Development in United Kingdom.
- Why are 29 custom software development agencies listed here but not ranked?
- 11 of the 143 listed have not yet been assessed on the Agency List Score. A further 18 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
- How is the ranking determined?
- By Agency List Score, within the Custom Software Development in United Kingdom cohort of 132 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.