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
3 Companies-Rankings updated: August 19, 2026
DesignRush evaluates each agency using expert assessment and client feedback to inform your choices. Some featured agencies have paid placements.
VerifiedVerified by the DesignRush team for authenticity and credibility.
Full-Cycle IoT and Software Development company
We deliver cutting-edge, scalable, and fully functional IoT hardware and software products and ecosystems that help clients achieve their specific objectives...
Location
London, United Kingdom
Number of Employees
500 - 999
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
24 Projects Listed
Yalantis Services
IoT
Software Development
Mobile App Development
AI Development
Big Data Analytics
IT Services
Cybersecurity
Staff Augmentation
Cloud Consulting
UI/UX Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
RAKwireless
Toyota Tsusho
KPMG
Healthfully
Orbis Systems
Lifeworks
Scholz Databank
123 Sourcing
Truhoo
Data sourced from the agency's DesignRush profile
Yalantis Reviews & Testimonials
Sergei Lishchenko
Director of Digital Experience and Innovation at Orbis System
5.0★
Fintech Review from Sergei Lishchenko
The exception team the client collaborated with brought in fresh ideas and innovative technologies previously unfamiliar to the client. For example, with Yalantis' guidance, the client's developers explore the Go language. The primary reason the client chose Yalantis is its strong organizational and project management skills. It's not just about the developers; Yalantis provides a comprehensive support framework, ensuring that a project manager is consistently present. (Verified via email)
Jason Jung
Senior engineering manager at Zillow
5.0★
Software Development Review from Jason Jung
Yalantis functions as an integral scrum team, supporting the development teams of a real estate firm. It created renovation project management tools that encompass a web app, a mobile app, and a backend system. Thanks to Yalantis, the client expanded development capabilities and achieved key short-term goals. Its quick integration was pivotal in launching various projects. Beyond delivering top-notch work, Yalantis emphasizes a culture that prioritizes the customer's needs. (Verified via email)
Roy D
Partner at RAKwireless
5.0★
Outsourcing Review from Roy D
An IoT manufacturer teamed up with Yalantis to craft an application, enabling users to manage their devices more efficiently. Utilizing Node.js and basing the architecture on Circulus, Yalantis delivered commendable outcomes. It is responsive to any development challenges, offering swift resolutions. The client appreciates Yalantis' proactive stance, impressive technical expertise, and practical solution suggestions. (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile
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Custom software, AI automation, and hard-to-find engineers. Since 2015.
Powercode Group builds custom software and AI solutions for Global startups and Fortune 500s. We deliver end-to-end products and supply pre-vetted engineers specializing in AI automation, ML, data, and DevOps. GDPR-compliant with hubs in the UK, DE, and PL...
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$40/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
12 Projects Listed
Powercode Services
Staff Augmentation
AI Development
Software Development
Mobile App Development
eCommerce Development
Web Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Bright Bird
Dee's Driving School
ASTARTA Holding NV
Data sourced from the agency's DesignRush profile
Powercode Reviews & Testimonials
Andrii Pazynich
CEO at Foodex24
4.8★
Software Development Review from Andrii Pazynich
Their process was extremely straightforward. Customers can expect high-quality work at a competitive price. The project was delivered on time, and everything worked well.
Viktor Nazarenko
CEO at Dwizh
5.0★
eCommerce Development Review from Viktor Nazarenko
The team has offered effective web and mobile solutions, and they deliver amazing results. I was impressed by their speed and stability.
Tetyana Ulyanova
COO at UNA PARTNERS
4.7★
Mobile App Development Review from Tetyana Ulyanova
I was impressed by their high-quality work. The Powercode team was incredibly responsive, flexible, and helpful, and their technical expertise is exceptional.
Reviews verified by DesignRush and sourced from the agency's profile
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Algosoup is a London-based software development company that provides AI-native, forward-deployed engineering services by embedding software engineers into client teams. It supports startups, scaleups, enterprises, and agencies with rapid MVP development, product engineering, AI integration, legacy...
Location
London, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$300/hr
Minimal Budget
$25,000 - $50,000
Algosoup Services
AI Development
Software Development
Mobile App Development
Software Testing
eCommerce Development
VR/AR
Blockchain
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts