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
15 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.
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
Show more
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
FinTech Unleashed: React Native Excellence by Andersen
Choose Andersen for top-tier React Native development in the FinTech industry. Trust our 190+ experts to ensure 100% compliance with industry standards...
Top Services:
Software Development
Web Development
UI/UX Design
Mobile App Development
Product Design
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Location
London, United Kingdom
Number of Employees
1000 & Up
Average Hourly Rate
$50/hr
Minimal Budget
$50,000 & Up
Portfolios Count
18 Projects Listed
Andersen Services
Software Development
Web Development
UI/UX Design
Mobile App Development
Product Design
AI Development
IT Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
GlobePayroll
Samsung
Marvel
Media Markt
IHS Markit
Data sourced from the agency's DesignRush profile
Andersen Reviews & Testimonials
Kristian Karimo CEO at OurCnC
5.0★
HTML5 Review from Kristian Karimo
Andersen offers skilled project managers who adhere to the approved development plan, ensuring the implementation of all functionalities on time. It generates clear reports, exhibits excellent communication, and is English fluent. The client communicates with Andersen via Skype and Slack and uses Jira as a tracking system. Andersen organizes the processes well and performs correctly. Its team is always punctual and dedicated to the project. Andersen helped in improving the client's product.
Markus Bohl Founder & Advisory Board Member at Laya Technologies
5.0★
Software Development Review from Markus Bohl
Andersen has a confident project manager who came through professionally and neatly structured the process. Anderson provided the client with individual resources that are a part of a larger, mostly remote team. With these resources, the client builds the initial product and brings it to a sales-ready stage so that it can be used with clients. Andersen helped with UI/UX design, software development, and Python backend development services (Verified via email)
Adalin Cheng Enterprise Solutions Architect at Neo-Bank
5.0★
Software Development Review from Adalin Cheng
One of the most impressive things about Andersen Lab is that the entire team [is fully dedicated] to [the] work they are doing. In the Agile process, where decisions are changed rapidly [...], [the] Andersen Lab team used to react patiently to every single change. Although the teams task is mostly implementation of our requirements, they often [go] the extra mile and [are involved] in the ideation process as well. (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
We integrate, innovate, and elevate enterprise systems.
Intellectsoft builds custom software, AI solutions, and dedicated engineering teams for enterprises and fast-growing businesses across the US and UK...
Top Services:
Software Development
Mobile App Development
Wearables
Software Testing
Blockchain
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Location
London, United Kingdom
Number of Employees
100 - 249
Average Hourly Rate
$80/hr
Minimal Budget
$50,000 & Up
Portfolios Count
12 Projects Listed
Intellectsoft Services
Software Development
Mobile App Development
Wearables
Software Testing
Blockchain
AI Development
UI/UX Design
Big Data Analytics
IT Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Harley-Davidson
the London Stock Exchange
Ernst & Young
Qualcomm
Bombardier
Data sourced from the agency's DesignRush profile
Intellectsoft Reviews & Testimonials
Harshal Chhajed Undisclosed at Undisclosed
4.5★
Software Development Review from Harshal Chhajed
They have highly skilled support staff for faster resolution which leads to customer satisfaction. Also, it has many features including IoT and blockchain apart from regular software development. If there are any changes in the scope of the project at a later stage, it can prove quite costly and also difficult to accommodate last-minute client-side scripting changes. They are versatile, cost-effective, and offer quick customer support. They offer a very customized software development tool where business needs can be addressed. It is very cost-optimized and hence can help generate good returns for business investment.
Vitaly Dyachenko CEO and Founder at UppLabs LLC
5.0★
Software Development Review from Vitaly Dyachenko
Intellectsoft provided a great partnership by delivering quality services and working fast. They helped us to accomplish all the clients' projects on time. The team communicated transparently and showed [] great dedication. They were an ideal partner! (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Smartym Pro is a full-cycle development company specialized in mobile application and enterprise web development. Company has strong development culture and focuses on innovative solutions, using cutting edge technologies and frameworks. Smartym Pro is located in Eastern Europe and consists primarily of...
Top Services:
Software Development
Mobile App Development
Staff Augmentation
Blockchain
IT Services
Show more
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$45/hr
Minimal Budget
$50,000 & Up
Portfolios Count
9 Projects Listed
Smartym Pro Services
Software Development
Mobile App Development
Staff Augmentation
Blockchain
IT Services
Web Development
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Coach-Apps
Heineken
Automagic
Pepsico
Sony (retailers)
Data sourced from the agency's DesignRush profile
Smartym Pro Reviews & Testimonials
Shaun Bennie Director at in5pire
5.0★
Software Development Review from Shaun Bennie
Co-funding’s collaboration with Smartym Pro began from discovery stage and design services for our online investor automation platform. In these initial stages Smartym demonstrated great skill and aptitude which convinced us to appoint them for the full MVP development part of the project. Smartym Pro’s team offered their vision to improve the quality of the delivered product. They met all deadlines and were keen to give great advice. It was a pleasure to work with Smartym Pro’s team.
Aleksander Stepanowicz CFO, co-founder at D-Factor Sp. z o.o.
4.8★
Outsourcing Review from Aleksander Stepanowicz
The Smartym Pro’s team has solid experience in development of web/mobile apps, blockchain platforms and smart contracts. We collaborate with Smartym Pro since June 2018 on 4 projects and are satisfied so far. The team is aware of cutting edge trends in emerging technologies and demonstrate willingness to contribute to the projects in an informal and creative way. And what is very important for us they tend to meet deadlines.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Index.dev is a global talent network that connects leading startups and enterprises with vetted tech talent remotely, from freelancers to contractors to full development teams. With 97% of trials turning into long-term hires, we help companies find highly-skilled tech talent within 48 hours, while managing...
Top Services:
Staff Augmentation
Software Development
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$70/hr
Minimal Budget
$50,000 & Up
Portfolios Count
9 Projects Listed
index.dev Services
Staff Augmentation
Software Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Stuart
Vodafone
NetRefer
Daloopa
Perforce Software
Genemod
Matsuko
Entrupy
Omio
SpeQtral
Data sourced from the agency's DesignRush profile
index.dev Reviews & Testimonials
SAV BEA Review from Google
5.0★
SAV BEA's Review Sourced from Google
" If you're looking for a technical consultant who is knowledgeable, reliable, and always willing to go the extra mile, then Vadym Yatsunyk is your guy.One of the things that set Vadym apart from other technical consultants is his ability to explain complex technical concepts in a way that is easy to understand. He takes the time to listen and then offers customized solutions"
Tata Review from Google
5.0★
Tata's Review Sourced from Google
I am delighted to share my experience working with Account Executive Vadym Yatsunyk. From the very first interaction, Vadym exuded professionalism, enthusiasm, and dedication towards helping me achieve my goals.
Tatiana Ursu Review from Google
5.0★
Tatiana Ursu's Review Sourced from Google
I am proud to be part of such a team of professionals as I met here at Index. Index is a wonderful employer!
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
Show more
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
Kellton is a publicly listed, CMMI Level 5, and ISO 9001:2015 certified global company, providing cutting-edge AI and digital transformation solutions and services in strategy, consulting, digital, and technology...
Top Services:
Big Data Analytics
Software Development
AI Development
Mobile App Development
Show more
Location
London, United Kingdom
Number of Employees
1000 & Up
Average Hourly Rate
$50/hr
Minimal Budget
$50,000 & Up
Portfolios Count
8 Projects Listed
Kellton Services
Big Data Analytics
Software Development
AI Development
Mobile App Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Max Life
Real Estate - Foxtons
Non Profits - Unicef
Govt. of Mauritius
Walmart
Data sourced from the agency's DesignRush profile
Kellton Reviews & Testimonials
Priyanshi Verma Review from Google
1.0★
Priyanshi Verma's Review Sourced from Google
Unprofessional, Mentally Draining, and Disrespectful Work CultureMy overall experience with this company was extremely toxic. During my short tenure, I observed several deeply unprofessional practices that left a lasting negative impact on me:•Salaries were often delayed, without prior communication or explanation.•There were unexplained deductions in monthly salary, and any attempts to raise concerns were either ignored or dismissed by HR.•The HR department was shockingly rude. I personally witnessed employees being humiliated or emotionally broken when they decided to resign — some even left in tears.•No proper Full and Final Settlement (FNF) or professional offboarding process was followed. It’s like once you resign, you’re treated as if you never existed.•Even after resignation, the company continued to send intimidating and threatening emails and begging for small amount of money like 20k, showing a complete lack of empathy — especially towards people who were already in a tough personal or financial situation.If you’re considering joining, please rethink carefully. Make sure everything is documented in writing — verbal promises mean nothing here. A company’s real face shows not when you join, but when you try to leave. And unfortunately, this one shows zero professionalism, zero compassion, and zero respect for employees.
Nani Sweety Review from Google
1.0★
Nani Sweety's Review Sourced from Google
I took 4 rounds of Interview for US IT Recruiter position..1st is virtual, 2nd round is In-person, 3rd and 4th are telephonic...They did not give any feedback.Worst experience, please don't attend interviews.waste of time
varsha kaushal Review from Google
1.0★
varsha kaushal's Review Sourced from Google
One of the worst organisation I have ever experienced . Exit process is worst moreover company doesn’t respond on your final f&f queries and literally one has to chase to get their full n final payment. Depending upon clients requirement organisation and their leaders push their employees and even salary is deducted if it is not billed as per clients need. Pathetic to be honest. Lala companies are doing better than this in country.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Future Platforms produces user-focused technical solutions for corporate clients. Our services include strategy, user experience, design, development and quality assurance. We have a strong focus on mobile, but work across the digital landscape designing and developing web and mobile apps, responsive...
Top Services:
Web Design
UI/UX Design
Software Development
Mobile App Development
eCommerce Development
Show more
Location
London, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$100/hr
Minimal Budget
$50,000 & Up
Future Platforms Services
Web Design
UI/UX Design
Software Development
Mobile App Development
eCommerce Development
Web Development
Product Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Domino's Pizza
First Group
Wembley
EE
Premier League
The Telegraph
Alcove
Workspace
Doring Kindersley
Cancer Research UK
Data sourced from the agency's DesignRush profile
Future Platforms Reviews & Testimonials
Balinder Review from Google
5.0★
Balinder's Review Sourced from Google
Future Platforms are a truly user-focused agency and as a result, create fantastic digital solutions that deliver for the customer and the business.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
&above is an AI product agency that helps scale-ups and enterprises turn AI experiments into a new way of working. With a problem-first, design-led approach, we design and build agentic products and AI operating systems that people actually use every day - not pilots that stall...
Top Services:
AI Development
Software Development
Engineering
UI/UX Design
Mobile App Development
Show more
Location
London, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$100/hr
Minimal Budget
$50,000 & Up
&above (andabove) Services
AI Development
Software Development
Engineering
UI/UX Design
Mobile App Development
Staff Augmentation
Branding
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Google
Google Cloud
Revolut
Sage
Tesco
Dunnhumby
Upstix
Data sourced from the agency's DesignRush profile
&above (andabove) Reviews & Testimonials
Perry Steward Review from Google
5.0★
Perry Steward's Review Sourced from Google
We partnered with &above on a joint client project, where they led design and development while we handled content strategy and SEO. The experience was smooth throughout. Their design work was sharp, their dev execution was clean, and they were easy to work with as a cross-functional partner. Would happily collaborate again and recommend them to any brand looking for a strong creative and technical team.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
We create solutions that work on the result of your projects.
PNN Soft is a trusted technology partner. We provide outsourcing and offshore software development services for business from different industries. We provide full-cycle development services, and we are expertise in custom development of software, mobile, web app, IoT, cloud, and PWA solutions...
Top Services:
Web Design
eCommerce Development
Software Development
Mobile App Development
IoT
Show more
Location
London, United Kingdom
Number of Employees
100 - 249
Average Hourly Rate
$30/hr
Minimal Budget
$50,000 & Up
PNN Soft Services
Web Design
eCommerce Development
Software Development
Mobile App Development
IoT
CRM Consulting
DevOps Consulting
Cloud Consulting
Wearables
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
LifeCell International
Amway
Nivac
Thales Group
Leo Burnett Worldwide
AstraZeneca
Data sourced from the agency's DesignRush profile
PNN Soft Reviews & Testimonials
Krishna Lomeli Review from Google
4.0★
Krishna Lomeli's Review Sourced from Google
Ok, we had year lasting project and I’d like to admit the confidence and stress resistance of the team, in each situation they didn’t panic but started searching the reason of the error, and finally eliminated it.Besides, among all, team has strong work ethics and sets an example with his perfect attendance. Of course, the attendance of this team members also contributes to the productivity levels and the project results. Yes, that was that impressed me most… I can say it for sure having in past bad experience with the Indian programmers)))
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Persistent Systems, a renowned global leader in software product development and technology services. Delve into our innovative offerings to stay ahead in the ever-evolving landscape of technology...
Top Services:
AI Development
Software Development
Web Development
Mobile App Development
Blockchain
Show more
Location
London, United Kingdom
Number of Employees
1000 & Up
Average Hourly Rate
$100/hr
Minimal Budget
$50,000 & Up
Persistent Services
AI Development
Software Development
Web Development
Mobile App Development
Blockchain
Cybersecurity
Managed Services
IT Services
Big Data Analytics
Cloud Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
GB Bank
Qapita
Vermont
Data sourced from the agency's DesignRush profile
Persistent Reviews & Testimonials
Sundeep Patel Review from Google
5.0★
Sundeep Patel's Review Sourced from Google
Persistent Systems Ltd is a global software company that provides innovative software solutions to clients worldwide. The Bhageerath office is one of the company's offices located in Pune, India. As an employee of Persistent Systems Ltd, I have had the opportunity to work at this office and experience its work culture, facilities, and environment.Work Culture:The work culture at Persistent Systems Ltd Bhageerath office is excellent. The company values its employees and provides a supportive environment that encourages creativity, innovation, and collaboration. The office has an open-door policy, and employees are encouraged to share their ideas and opinions freely. The management is approachable and provides ample opportunities for career growth and development.Facilities:The Bhageerath office has excellent facilities that cater to the needs of its employees. The office is spacious and well-equipped with state-of-the-art technology and infrastructure. The office has a modern cafeteria that serves a variety of delicious food and beverages. The office also has a gymnasium, a recreation room, and a meditation center, which are available to employees to use during their free time.Environment:The environment at Persistent Systems Ltd Bhageerath office is conducive to work. The office is located in a peaceful and quiet area, away from the hustle and bustle of the city. The office is surrounded by lush greenery and has a beautiful view of the nearby hills. The office has an eco-friendly policy and encourages its employees to adopt sustainable practices.Employee Experience:As an employee of Persistent Systems Ltd Bhageerath office, my experience has been excellent. The company provides a supportive and inclusive work environment that values its employees. The facilities and amenities provided by the company are top-notch, which makes it a great place to work. The company also provides ample opportunities for career growth and development.Conclusion:In conclusion, Persistent Systems Ltd Bhageerath office is a great place to work. The work culture is excellent, and the company values its employees. The facilities and amenities provided by the company are top-notch, which makes it a comfortable and enjoyable place to work. The environment is conducive to work, which makes it an ideal location for an office. Overall, it is a highly recommended place to work.
Harshad N Review from Google
5.0★
Harshad N's Review Sourced from Google
Well known IT company in Pune. Founded and managed by Dr Deshpande.Persistent family known for their social service along with the core business in IT sector..
Praveen Soni Review from Google
5.0★
Praveen Soni's Review Sourced from Google
One of the best IT company in pune. Location and offices are best. Personally I likes the name of buildings.
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.