Leaf through the premier custom software development companies in London that customize, maintain and/or build high-quality solutions, mobile applications and more. Filter listings by reviews, pricing, team size to find the ideal team for your project requirements and budget.
Best London Software Development Firm Rankings
7 Companies-Rankings updated: August 19, 2026
DesignRush assesses agencies using expertise standards and verified client experiences to help you make better decisions. Certain agencies have paid placements.
Ezulix is a custom software development company specialising in bespoke software designs tailored to specific business requirements. Ezulix specialises in on-demand solutions in the following fields:...
Location
London, United Kingdom
Number of Employees
100 - 249
Average Hourly Rate
$30/hr
Minimal Budget
$1,000 - $10,000
Ezulix Services
eCommerce Development
Web Development
Web Design
Software Development
IT Services
Mobile App Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Foodee
Secure-X
Doctor+
Data sourced from the agency's DesignRush profile
Ezulix Reviews & Testimonials
Evan Merali
Managing Director at Raymond James
5.0★
Web Development Review from Evan Merali
We had a great experience working with Ezulix for the Web Development project. We were already impressed with their prolific experience in the same field coupled with reasonable pricing. Our project was complex and the architect at Ezulix conducted thorough review and displayed an impeccable understanding of the the functionalities and implementations.
All of the deliveries were made in the timely manner. We highly recommend their services to anyone looking for blockchain application development.
robert burr
Executive Vice President at Prince Contracting, LLC
5.0★
Software Development Review from robert burr
Ezulix has focus on a highly responsive portfolio management solution capable of handling thousands of large, complex projects. The agency developed core technologies for the platform while collaborating closely with their team. Although remote work posed some challenges, we remarked that Ezulix's efficient project manager worked diligently to solve communication issues.
Ruth McMenamin
Head of Marketing at Canopy & Stars
5.0★
eCommerce Development Review from Ruth McMenamin
The team rarely encounters a design that truly leaves them in awe, but Ezulix's work perfectly captured the desired temperament and even surpassed expectations. The feedback from existing users familiar with the old website has been overwhelmingly positive. Every aspect of the UX/UI design contributed to creating a website beyond what was initially envisioned. The team wholeheartedly recommends Ezulix for exceptional design solutions.
Reviews verified by DesignRush and sourced from the agency's profile
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We build mobile apps, web platforms & AI workflows for organisations doing good in the world.
3 Sided Cube is a global mobile app and digital development company with a passion for Tech For Good, championing the genius over the generic to build life-saving, life-changing digital solutions...
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$150/hr
Minimal Budget
$50,000 & Up
Portfolios Count
5 Projects Listed
3 Sided Cube Services
Mobile App Development
Software Development
Web Development
AI Development
Digital Services
UI/UX Design
Digital Strategy
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
American Red Cross
Surfers Against Sewage
Omaze
Vodafone | Glastonbury Festival
LUSH
Global Forest Watch
The World Resources Institute
University Of Bristol
GDPC
Wonderbly
Data sourced from the agency's DesignRush profile
3 Sided Cube Reviews & Testimonials
Si Muddell
Review from Google
4.0★
Si Muddell's Review Sourced from Google
Fantastically positive and driven team who on every interaction you just know care deeply about a) what they do b) what they deliver and c) ultimately the experience the end user will have.
Hugely impressed with their personal, creative and energy driven approach at the pitch stage, I commissioned 3SC to help us better scope an app. Their task was to take an in-house developed app prototype, and turn it into a fully fledged technical specification with user stories, MoSCoW prioritisation, costs, and an updated look and feel; all done with audience need at the heart.
Myself and the wider team have nothing but very good things to say about 3SC. When reflecting on an agency to work with, loads say they can do it, some can actually do what they say they can do, even less do it in the spirit of real partnership and mutually respect/drive. 3SC do all of these excellently. I highly recommend them.
Oliver Morrison
Review from Google
5.0★
Oliver Morrison's Review Sourced from Google
A passionate team of insanely talented experts, producing industry leading technology for good causes. Highly recommend.
Kev Borrill
Review from Google
5.0★
Kev Borrill's Review Sourced from Google
Great Digital agency with a passion for making great mobile apps in the Tech for good industry
Reviews verified by DesignRush and sourced from the agency's profile
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Expert in Developing Custom Software, Mobile Apps, and Web Apps for Any Industry Worldwide| B2B
Softexpoit's team of experts combines technical expertise and creativity to develop custom software, mobile app, and web app, backend, mac/windows solutions that meet your specific business/official needs.
We understand that every business is different, which is why we offer customized solutions...
Location
London, United Kingdom
Number of Employees
Under 49
Minimal Budget
$10,000 - $25,000
Portfolios Count
8 Projects Listed
Softexpoit Services
Mobile App Development
Software Development
Web Development
IoT
Software Testing
Web Design
UI/UX Design
AI Development
eCommerce Development
Cloud Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Intelligent & Adaptive B2B Marketing Services for Tech/IT Enterprises
At MWJ, you can choose from our à la carte menu of B2B marketing services each month, tailored to your Tech/IT needs. From foundational insights to content and digital strategies, select the magic that suits you best...
Location
London, United Kingdom
Number of Employees
Under 49
Minimal Budget
$1,000 - $10,000
Portfolios Count
3 Projects Listed
MWJ Services
Content Marketing
Social Media Marketing
Advertising
Digital Marketing
Digital Services
Software Development
IT Services
Digital Strategy
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Creating Effective Digital Solutions For Complex Challenges
We are Zentix Soft, a UK-founded IT company with offices in Ukraine and Latvia. Our team specializes in full-cycle web development, mobile app development, and custom software solutions. We operate in three models: in-house, outsourcing, and outstaffing, helping clients build efficient and scalable...
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
1 Project Listed
ZentixSoft Services
Web Design
Mobile App Development
Web Development
Software Development
UI/UX Design
eCommerce Development
WordPress Website Design
Software Testing
Blockchain
IT Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
At GSS Tech Solutions, were redefining IT services with a commitment to excellence, reliability, and innovation. Each project reflects our dedication to quality, timeliness, and consistent performance. By continuously evolving our technology and enhancing client value, our passionate team thrives on embracing...
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$25/hr
Minimal Budget
$1,000 - $10,000
GSS Tech Solutions Services
Web Development
eCommerce Development
Digital Marketing
SEO
Software Development
Mobile App Development
IT Services
DevOps Consulting
Cybersecurity
Social Media Marketing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Elmar Home Care
AK Travel & Money Transfer
Switich Ur Energy
GSS Securities Inc
Youtilities
Data sourced from the agency's DesignRush profile
GSS Tech Solutions Reviews & Testimonials
Muhammad Tayyab
Review from Google
5.0★
Muhammad Tayyab's Review Sourced from Google
"We tried google ads before but didn’t get much out of it. Now it’s been better they took time to understand our audience. Results were slow with the First ad but they tweaked it and now we’re getting leads. Overall good work
David Jim
Review from Google
5.0★
David Jim's Review Sourced from Google
GSS Tech Solutions took our website from invisible to the first page of Google! Our traffic has doubled, and we're getting more inquiries than ever. Highly recommended!
Johir Uddin
Review from Google
5.0★
Johir Uddin's Review Sourced from Google
I’m really happy with the work GSS Tech Solutions did on my eCommerce website and mobile app. They built a great-looking site and an easy-to-use app that helped me reach more customers and sell more products. Their team was helpful and really knew their stuff. If you need a good website or app, I’d definitely recommend them!
Reviews verified by DesignRush and sourced from the agency's profile
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