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
4 Companies-Rankings updated: August 19, 2026
All agencies are evaluated on DesignRush for demonstrated expertise and authentic client reviews to support your decision. Certain placements are paid.
Kernelics is a boutique web and mobile software development firm
for startups and tech companies...
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$40/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
18 Projects Listed
Kernelics Services
Mobile App Development
Staff Augmentation
Product Design
Software Development
eCommerce Development
IT Services
Web Design
Software Testing
Web Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Small Business Industry
Fintech Industry
Marketing Industry
Data sourced from the agency's DesignRush profile
Kernelics Reviews & Testimonials
Dzmitry Novikau
Co-Founder at Obsidian AI
5.0★
Staff Augmentation Review from Dzmitry Novikau
I worked with Kernelics on a crypto project where we needed help with both design and development. From the beginning, the team was easy to communicate with and clearly understood what we were trying to build.
The designer improved our initial ideas by making the user experience more intuitive. They suggested better ways to structure the navigation and user flow, which helped reduce friction and made the product easier to use.
We also brought in one of their developers, who worked alongside our existing team member. They collaborated well, completed the work on time, and handled some challenging parts of the exchange functionality without any issues.
Overall, Kernelics delivered quality work, stayed within budget, and were professional throughout the process. I’d recommend them to others looking for a reliable design and development partner, especially for crypto or fintech projects.
Stsiapan Kolesau
CEO at Module Technology
5.0★
Web Development Review from Stsiapan Kolesau
I CEO at the construction company specializing in modular buildings and their components. With years of experience and multiple projects, we decided to expand our online presence beyond our two existing landing pages. We needed a corporate portal to showcase products, manage content easily, and dynamically calculate product costs.
On a recommendation, we chose Kernelics, and their organized approach and clear task division impressed us from the start. They began with an in-depth analysis of our needs and a competitive review. For the design, we requested a minimalist style, and the results were spot on, requiring only minor tweaks to meet our expectations.
For development, Kernelics selected React, Next.js, and TypeScript, with Strapi for the admin panel. They also integrated Google Sheets to handle dynamic price calculations, enabling instant updates on the site by simply modifying the spreadsheeta feature weve found incredibly useful.
Now, two years later, the portal continues to support our growth, and were planning new developments for our main site.
Kernelics stood out for their transparent approach and professionalism at every stage, and I confidently recommend them to anyone seeking a reliable web development partner.
Reviews verified by DesignRush and sourced from the agency's profile
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Custom Product & Software Development Focused On Your Success
Altar.io is dedicated to building user-focused digital solutions with a co-founder mindset. Our unparalleled skills in software creation ensure rapid, lean development and transparent collaboration. We deliver precise, market-ready products that empower clients to innovate and succeed...
Location
London, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$100/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
9 Projects Listed
Altar.io Services
Software Development
Mobile App Development
AI Development
Product Design
UI/UX Design
IT Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Loan Lynx
Movie Me!
Krepling
Ovvio
Fave
Legartis
McKinsey & Co
Audio Test Kitchen
QuartalFS
Apiax
Data sourced from the agency's DesignRush profile
Altar.io Reviews & Testimonials
Dudley Gould ACA
Founder at Circit
4.8★
Fintech Review from Dudley Gould ACA
What set's Alatar.io apart is their team. They are not only experienced product managers, software developers and designers but have a lot of experience building and helping startups. Whilst Altar.io is responsible for all of the tech development, a huge amount of my time with the Altar.io team is actually spent working on strategy, marketing and business development. I highly recommend working with Altar.io.
Reviews verified by DesignRush and sourced from the agency's profile
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Bridging The Gap Between Technology And Creativity.
We specialise in web solutions for creative brands, offering services in podcast strategy development, website design, and ongoing tech support. Our mission is to empower artists, bands, and broadcasters, helping them turn their vision into a seamless digital experience...
Location
London, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$75/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
3 Projects Listed
Rocking Tech Services
Digital Marketing
Web Development
Mobile App Development
AI Development
Software Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts