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
5 Companies-Rankings updated: September 06, 2026
DesignRush assesses agencies using expertise standards and verified client experiences to help you make better decisions. Certain agencies have paid placements.
VerifiedVerified by the DesignRush team for authenticity and credibility.
Turning Software Ideas Into Reality
Itransition specializes in assisting startups and medium to large scale businesses with their software solution needs. Our range of services encompasses the entire development lifecycle, from initial business process inquiry and modeling to comprehensive systems engineering...
Top Services:
Software Development
IT Services
Business Consulting
eCommerce Development
Cloud Consulting
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Location
London, United Kingdom
Number of Employees
1000 & Up
Average Hourly Rate
$40/hr
Minimal Budget
$50,000 & Up
Portfolios Count
8 Projects Listed
Itransition Services
Software Development
IT Services
Business Consulting
eCommerce Development
Cloud Consulting
Big Data Analytics
VR/AR
Mobile App Development
Web Design
ERP Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
PayPal
Adidas
Expedia
Ebay
Philips
PepsiCo
Xerox
LISI AEROSPACE
HAI Group
Anybill
Data sourced from the agency's DesignRush profile
Itransition Reviews & Testimonials
Robert Hager Chief Business Analyst at Simpson Strong-Tie
5.0★
Software Development Review from Robert Hager
Itransition carried out the entire software testing process without a single delay. Despite the remote cooperation, the company ensured ceaseless communication, which indicates a high level of the team’s professionalism and organization.
Jimmy Carlisle Director of Audit at Dixon Hughes Goodman LLP
5.0★
Software Development Review from Jimmy Carlisle
We needed an in-depth upgrade of the legacy auditing system. We chose Itransition because they swiftly responded to our project requirements and had relevant expertise. The team helped us decide on the solution’s tech stack and designed the new architecture, migrated legacy data, developed new features, and customized the software with extensions. We got a powerful and user-friendly auditing system and were very impressed with the Itransition’s dedication and attention to detail.
Shoshana Parker Senior Computational Biologist at SBH Health System
5.0★
Software Development Review from Shoshana Parker
We enjoyed working with Itransition. We needed a solution for transferring health records from our EHR into the data warehouse without losses. We chose Itransition for their experience, portfolio, and past clients’ references, and the team fully met our expectations. They built a custom ETL tool that increased our visibility into clinical data and helped us spot inefficiencies in patient workflows. Needless to say, they also delivered it on time and budget.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Solving complex problems with design and technology since 2005.
We create digital products that streamline operations, grow your audience, and boost business success. Partnering with visionary brands, we transform ideas into impactful solutions using innovative design and technology. Discover how our Software Development expertise can elevate your next project...
Top Services:
Web Development
Web Design
Mobile App Development
UI/UX Design
Software Development
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Location
London, United Kingdom
Number of Employees
250 - 499
Minimal Budget
$50,000 & Up
Portfolios Count
24 Projects Listed
Infinum Services
Web Development
Web Design
Mobile App Development
UI/UX Design
Software Development
Cloud Consulting
DevOps Consulting
Cybersecurity
Staff Augmentation
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Porsche
Nike
CITI
Royal Caribbean
Philips
Bayer
T-Mobile
P&G
Universal
Virgin Mobile
Data sourced from the agency's DesignRush profile
Infinum Reviews & Testimonials
Matic Debelak Management Board Member at Modra zavarovalnica, d.d.
5.0★
Mobile App Development Review from Matic Debelak
Workstream 1: research and product strategyWorkstream 2: ETP release Technology : Vendor use Flutter framework, which allows one programming language and one codebase to create two different apps (for iOS and Android). Clearly defined roles and responsibilities, communication is clearly and respectfully, very effective project methodology, trying to understand every time how their activities fits into mission of Modra zavarovalnica, respect each member of team, etc.
Claus-Peter Mueller Managing Director at NLB Lease&GO doo
5.0★
Software Development Review from Claus-Peter Mueller
We have engaged Infinum to develop an app that would digitalise our leasing process. From creating the initial offer through the necessary financing application and client identification to the final signature – all the steps required to successfully lease a vehicle or other object can be performed in-app, freeing the users of friction and having to deal with tedious paperwork.The app itself in the background has 30+ integrations, while keeping a seamless and quick to follow process on the front for our users. That application is in production and Infinum is responsible for maintaining it and further improving. After the initial development, we have additionally expanded our scope from vehicles to other equipment. They have also developed a Leasing widget, product which enables quick financing model while purchasing a vehicle online on car seller marketplace pages. At this moment, we are still in partnership with Infinum, and their engagement is mainly focused on localising the app to other countries and supporting us in our further business expansion. The work performed was done in Ruby on Rails and React technology, with support of other services.
Anonymous VP of Marketing at SaaS Company
5.0★
Web Design Review from Anonymous
Thanks to Infinum's website refresh, the client has seen an almost 100% improvement in their website's conversion rates. The team excels at project management, using the client's own proprietary tool and also Figma very well. Their proficiency in design, delivery, and client relations stands out.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
VerifiedVerified by the DesignRush team for authenticity and credibility.Award WinnerRecipient of a Best Design Award for outstanding work.
Accelerating growth through cutting-edge, data-driven strategies and solutions
Codal is an award-winning design and development consultancy helping enterprises solve complex challenges and accelerate growth with data-driven digital solutions. Our global team delivers expertise in digital transformation, eCommerce, UX/UI, product strategy, analytics, and AI...
Top Services:
Web Development
eCommerce Development
Software Development
Web Design
UI/UX Design
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Location
Lincoln, United Kingdom
Number of Employees
250 - 499
Average Hourly Rate
$145/hr
Minimal Budget
$50,000 & Up
Portfolios Count
7 Projects Listed
Codal Services
Web Development
eCommerce Development
Software Development
Web Design
UI/UX Design
Digital Strategy
Managed Services
CRO
Mobile App Development
DevOps Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Samsung
Pepsi
Charles Schwab
Mark Cuban Cost Plus Drugs Company
Hertz
Garrett Popcorn
cpap.com
Mt. Hood Meadows
SITKA Gear
CarParts.com
Data sourced from the agency's DesignRush profile
Codal Reviews & Testimonials
Marco Omeara Marketing Director at Sports Tech Platform
5.0★
Web Development Review from Marco Omeara
Codal is fantastic. They have set up a great platform and then respond quickly and effectively when issues arise.
Nicky Sewart Project Manager at HEM
5.0★
Software Development Review from Nicky Sewart
Great company, have worked with Codal for a number of years. Very smart guys, detail orientated and deliver what they promised. Definitely recommend working with them.
Valentino Stebbings CEO at HJ
5.0★
Software Development Review from Valentino Stebbings
It was a great experience working with Codal. The team that was assign to me treated me and gave me so much info to help me with my Healthcare Startup. This company was what I was looking for and they mad my ideal come to life.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Globally Recognized Digital and Engineering Solutions Partner.
Named Best AI Company and Software Development Company by The Netty Awards, Opinov8 is a global technology firm with development hubs across the United States, Europe, and Egypt...
Top Services:
Software Development
Mobile App Development
UI/UX Design
Web Development
Big Data Analytics
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Location
London, United Kingdom
Number of Employees
250 - 499
Average Hourly Rate
$42/hr
Minimal Budget
$50,000 & Up
Portfolios Count
3 Projects Listed
Opinov8 Services
Software Development
Mobile App Development
UI/UX Design
Web Development
Big Data Analytics
Staff Augmentation
Cloud Consulting
DevOps Consulting
IT Services
AI Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Apadmi designs, develops and optimises mobile apps for leading brands. We unlock new value through strategy, platforms, middleware and systems integrations that transform the way they work...
Top Services:
Mobile App Development
UI/UX Design
Web Development
Software Testing
Blockchain
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Location
Manchester, United Kingdom
Number of Employees
250 - 499
Average Hourly Rate
$200/hr
Minimal Budget
$50,000 & Up
Apadmi Services
Mobile App Development
UI/UX Design
Web Development
Software Testing
Blockchain
Software Development
CRM Consulting
Managed Services
IT Services
DevOps Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Co-op
Domino's Pizza UK and Ireland
The Guardian
United Utilities
HSS
NHS
SailGP
Argos
Charles Stanley
BBC
Data sourced from the agency's DesignRush profile
Apadmi Reviews & Testimonials
Thomas Booth Review from Google
2.0★
Thomas Booth's Review Sourced from Google
I recently had an experience back in 2022 with Apadmi that I feel compelled to share and have debated whether i should post this. As a professional eagerly looking forward to an interview with Apadmi, I was unfortunately met with a series of disappointments.Firstly, the structured process I was initially promised for the interview was not adhered to. This lack of organisation not only threw me off but also made it challenging to present myself effectively and forced to do a presentation in less than 24 hours notice.More concerning, however, was my interaction with the Managing Director, not sure if he is still there. I found his demeanour not just unprofessional but outright rude. This was disheartening, especially coming from a leadership figure in a reputable company. I've actually never been so humiliated in the professional environment.It's important for companies to remember that interviews are a two-way process. They are not just about evaluating candidates, but also about demonstrating the company's values and culture. Unfortunately, my experience with Apadmi fell short of the professional standards one would expect, however i would say Marcus, one of the board members was a delight in my first stage.I hope my feedback is taken constructively, as it is intended to highlight areas where there is significant room for improvement in how Apadmi manages its recruitment process and senior staff interactions.
Steve Jackson Review from Google
5.0★
Steve Jackson's Review Sourced from Google
Fantastic team, you can rely on them always.. Robert a partner of Apadami is an exceptional individual who supported me with my project in a professional manner. With his excellent peoples skills he will look after you. The person you can rely on anything and keep you assured. Will always go back to Apadami.
Manoj Ranaweera Review from Google
5.0★
Manoj Ranaweera's Review Sourced from Google
Apadmi's ability to spin out technology as separate companies is remarkable. A strong supporter of Manchester tech ecosystem, they became unbeatable in mobile category during the first three years of northern tech awards before it adopted a new structure and ownership. Another remarkable achievement is that the four founders have remained together during all these years. I wish them all the best.
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