Scan the leading custom software development companies in the UK that build bespoke solutions and offer specialized software services for various verticals. Compare their portfolios, reviews, expertise, budget, team size and more to find the right team for your next project.
We Vetted The Best United Kingdom Software Development Firms For You
2 Companies-Rankings updated: September 06, 2026
DesignRush evaluates each agency using expert assessment and client feedback to inform your choices. Some featured agencies have paid placements.
Transform your business ambitions into measurable outcomes
Tech strategy advisor & delivery partner with 25+ years of experience. We deliver measurable results through a unique, AI-enabled advisory & delivery framework combining technological heritage with AI-driven optimisation to scale faster, with full governance and compliance...
Top Services:
Software Development
Cloud Consulting
DevOps Consulting
Big Data Analytics
IT Services
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Location
London, United Kingdom
Number of Employees
500 - 999
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
20 Projects Listed
Future Processing Services
Software Development
Cloud Consulting
DevOps Consulting
Big Data Analytics
IT Services
Digital Strategy
Managed Services
AI Development
Cybersecurity
Product Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
The Digital Product Studio | Apps, Web Apps and Websites
We're Rareloop, a B-Corp, digital product studio, based in the UK. We design and build beautiful, high-performing websites, web apps, and bespoke systems that help organisations grow, streamline operations, and make a bigger impact...
Top Services:
Web Development
Web Design
UI/UX Design
Software Development
Mobile App Development
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Location
Southampton, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$150/hr
Minimal Budget
$25,000 - $50,000
Rareloop Services
Web Development
Web Design
UI/UX Design
Software Development
Mobile App Development
Product Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Alcohol Change UK
Tearfund
Toilet Twinning
John Charcol
Osprey
Sailors Society
The European Investment Bank
National Grid
Mind
Intelligent Insurance
Data sourced from the agency's DesignRush profile
Rareloop Reviews & Testimonials
Dan Benham Review from Google
5.0★
Dan Benham's Review Sourced from Google
Working with Rareloop has been a pleasure. From the start of the project they got a good grasp of what we needed as a business. Their thorough scoping sessions dug deep into every aspect of our mission, and made sure the rest of the project was well informed.As the new site came to life through the design and build process, it was great to see that all of the decisions we’d made during the scoping sessions were now considered and all working together.Since the site has gone live we have continued working with Rareloop, with them providing ongoing support for the site. This gives us peace of mind that all the necessary updates are done to keep the site optimised and running smoothly, as well as giving us some time to make improvements to the site each month.Above all the team at Rareloop are always friendly and reliable, happy to talk things through on a call, and always happy to explore solutions to new problems.
Ben Walker Review from Google
5.0★
Ben Walker's Review Sourced from Google
We asked Rareloop to develop an application to centralise and simplify our business administration tasks for a planned business expansion.The whole team were personable, professional, and easy to work with. The time and effort they took in the discovery phase to understand and document our processes went well beyond my expectations and was a collaborative process throughout.The application was ready for our launch date, has easily saved us a salary, and has removed admin as a burden so we can focus on our clients.I would highly recommend Rareloop as a partner for anyone in a similar position.
Dave Branscombe Review from Google
5.0★
Dave Branscombe's Review Sourced from Google
If you're looking for a team that clicks with you from the start then look no further than Rareloop.When it comes to web design and software development they know their stuff!Whether you're building a website or leading-edge software from the ground up, they have all the expertise you'll need. With their innovative approach to user experience and design all the way through to the final coding and technical integration, they don't just deliver what you ask for, they provide solutions you didn't even know you needed; and their top-notch project management ensures smooth sailing from start to finish.What sets Rareloop apart is their ability to blend technical expertise with creative vision, and timely delivery.I wholeheartedly recommend Rareloop for your next web or software project.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
What are the core specializations of custom software development companies in the United Kingdom?
The core specializations of custom software development companies in the United Kingdom generally center around web/mobile app development and advanced digital technologies. Their expertise extends to AI-powered products, cloud solutions (especially DevOps), feature enrichment, and cybersecurity.
Overall, they provide end-to-end digital transformation solutions and engineer custom platforms and systems that drive competitive advantage and business growth across industries.
How much do software development services cost in the UK?
The cost for software development services in the UK ranges from £25,000 to £120,000 for small businesses. In contrast, large enterprises undertaking extensive digital transformation or building sophisticated, bespoke systems should anticipate costs starting at £80,000 and potentially exceeding £500,000.
For startups or businesses aiming to validate a concept, the initial cost is considerably lower. A minimum viable product (MVP) or a proof-of-concept generally falls within the £5,000 to £30,000 range. The final price is ultimately determined by the project's complexity, the chosen technology stack, the developers’ experience, and the geographical location of the service provider, which impacts their hourly or daily rates.
How do I choose the right United Kingdom software development firm?
To choose the right United Kingdom software development firm, begin by evaluating its portfolio and case studies to make sure they have experience in your required technology stack and niche. Inquire about its process and team structure, to make sure they follow an iterative methodology and that the core development team will be dedicated and accessible for regular communication.
Finally, prioritize a company with good reviews that reflect a track record of robust post-launch support and good collaboration throughout the project.
Do software development companies provide ongoing support?
Yes, software development companies do provide ongoing support, maintenance, and updates after the product launch. This post-launch service is important for fixing bugs, maintaining security, adapting to changing user needs, and making sure the software remains stable and competitive.
How do custom software development companies in the United Kingdom handle project revisions?
Custom software development companies in the United Kingdom predominantly handle project revisions through the Agile methodology. This involves breaking the project into short, iterative sprints, allowing the client to provide feedback and request necessary revisions at the end of each cycle.
This flow is intended to minimize risk and keep the final product aligned with the envisioned concept, rather than waiting until the end for a major change.
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Proposals