Top JavaScript Development Companies in London
SelectedFirms reviews agencies and verifies client feedback to support informed decisions. [How SelectedFirms Ensures Trust]
Explore Reviewed JavaScript Development Companies in London — Find Skilled JavaScript Developers for Your Project
Certain agencies may be featured through sponsored placements. Rankings and SF Scores remain unbiased and are based solely on our evaluation methodology.
64 Companies
Filter by
-
UK
-
London
-
London
0.0 (0 Reviews)
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
We Deliver Digital!
Breathe is a digital production studio with locations in Cape Town, South Africa, and Shoreditch, London. We collaborate closely with brand owners and marketing firms to make sure their digital concepts are realized. Our priorities are quality control, turnaround time, cost effectiveness, and technological perfection. With multi-channel digital experience, our award-winning team of project managers, developers, and QA specialists has created international campaigns for some of the biggest companies in the world.
View Breathe Profile
$150-$199/hr
$10,000+
10 - 49
London, UK
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
We're the creative thinkers & digital doers on your side.
Legal professionals face unique challenges in the digital landscape, and our team specializes in creating award-winning websites and digital marketing strategies to convert visitors into loyal clients. We enhance online presence, stay ahead of the curve, and provide industry tips through our monthly newsletter, The Legal Marketing Master. Our clients include higher education, professional services, B2B science & research, and charities. We have achieved significant results, including increased organic traffic, conversion rates, and ROI on digital advertising campaigns. With 24+ years of experience and 60+ awards, we can help you achieve your goals.
View Contra Agency Profile
$50-$99/hr
$25,000+
10 - 49
London, UK
0.0 (0 Reviews)
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
A Leading Mobile App Development Company
OpenXcell, a top resource hiring and custom software development firm with its headquarters in the USA and a 2009 incorporation, is renowned for offering the top 1% talent in the IT sector, as well as highly qualified resources with more than 10 years of relevant expertise. Our patented talent recruitment techniques guarantee the greatest resource selection and creation of cutting-edge, user-friendly solutions. We have developed into a one-stop shop that provides comprehensive business and technology consulting.
View OpenXcell Profile
$25-$49/hr
$10,000+
250 - 999
London, UK
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Local insight, global reach
StableLogic is a technology consulting and software development firm specializing in custom application development, customer contact solutions, enterprise networking, and AWS cloud services. We help organizations accelerate digital transformation and achieve business objectives through secure, scalable, and cost-effective technology strategies. Serving industries including financial services and manufacturing, StableLogic delivers expert IT consultancy, cloud architecture, and infrastructure support designed to optimize performance, enhance connectivity, and drive operational efficiency.
View StableLogic Profile
$50-$99/hr
$5,000+
50 - 249
London, UK
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Your Growth-Oriented Technology Satellite
DOIT Software is a reliable technology partner helping companies accelerate growth through custom software development and advanced .NET solutions. We work with startups, SMBs, and enterprises to design, build, and scale high-performance digital products that solve real business challenges and deliver measurable ROI. Our core services include: IT Staff Augmentation: Quickly extend your team with experienced, vetted engineers who integrate seamlessly and drive projects forward. Custom Software & Mobile App Development: End-to-end development—from strategy and architecture to deployment—focused on scalability, security, and efficiency. With a results-driven approach and deep technical expertise, DOIT Software turns ideas into powerful, future-ready solutions that move your business ahead.
View DOIT Software Profile
$25-$49/hr
$10,000+
10 - 49
London, UK
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
People who empower businesses with high-quality software
Powercode Group: Your Premier Global Software Development Partner Powercode Group stands as a leading international software development agency, strategically segmented into three specialized divisions to cater to diverse business needs. This unique structure guarantees targeted expertise while upholding exceptional quality, security, and compliance standards for every project. Custom Software Development and Digital Solutions: The Powercode division excels in delivering tailored software solutions, including innovative web and mobile applications, MVPs, SaaS platforms, and expansive enterprise systems. Our expert teams manage everything from product strategy and UX/UI design to development and long-term scaling. Advanced Data and Technology Services: Scorpion Power is dedicated to pioneering advanced, data-driven solutions. We harness the power of AI, big data, IoT, blockchain, and Web3 technologies, crafting fintech and healthcare solutions alongside robust cybersecurity measures for highly regulated sectors. IT Staffing and Team Augmentation: SpaceIT focuses on streamlining your operations with dedicated teams and staff augmentation services. Our remote engineering support allows businesses to scale effectively while maintaining clarity and control over their projects. Operating under stringent European standards, including GDPR compliance, Powercode Group partners with startups, scale-ups, and enterprises globally, ensuring reliable and scalable technology solutions backed by expert teams. Experience a free strategy session today and discover how we can elevate your project to new heights.
View Powercode Group Profile
$25-$49/hr
$5,000+
50 - 249
London, UK
0.0 (0 Reviews)
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
18
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Creative digital solutions
Inventiff is a full-service technology and digital product development partner helping businesses transform ideas into scalable, high-performance solutions—quickly and efficiently. We specialize in custom software development, website engineering, digital product design, and expert team augmentation to support growth at every stage. Our end-to-end services include full-cycle software development, UX/UI design, visual branding, and dedicated development teams tailored to your business objectives. Since 2020, we have delivered 80+ successful projects for startups and SMBs across Europe and North America, building long-term partnerships and expanding our cross-industry expertise. Backed by a trusted network of senior developers with 8+ years of experience, Inventiff provides technical leadership, seamless execution, and a client-focused approach. Whether you need a strategic tech partner or on-demand experts, we deliver reliable digital solutions that drive measurable business results.
View Inventiff. Profile
$25-$49/hr
$1,000+
10 - 49
London, UK
0.0 (0 Reviews)
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Transform Your Business
We are an IT firm situated in London. To meet the particular requirements of startups, small businesses, and medium-sized enterprises, we offer tailored solutions. With our special all-in-one software development services, we have produced numerous successful software projects.
View Dogantech LTD Profile
/hr
$1,000+
10 - 49
London, UK
0.0 (0 Reviews)
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Shaping Digital Innovation.
Fusion Forge Tech is an IT company that specializes in providing high-quality web and mobile development services for businesses. They focus on creating user-centered platforms with performance, scalability, and sleek design. They offer custom websites, responsive web apps, and cross-platform mobile applications, combining clean code with creative UI/UX. Their developers are fluent in the latest technologies like React, Next.js, Laravel, and Flutter, ensuring robust and future-ready solutions. Fusion Forge Tech aims to create digital experiences that impact startups and established businesses.
View Fusion Forge Tech Profile
$25-$49/hr
$1,000+
10 - 49
London, UK
0.0 (0 Reviews)
0.0 (0 Reviews)
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Powering Your Ambition
Niteco, which was founded in 2010 by Swedish tech veteran Pelle Niklasson, has completed hundreds of projects for clients in over 30 nations. We have more than 300 professionals with a variety of backgrounds and specialties. Niteco is a strong believer in the value of a supportive community, a welcoming workplace, and the special fulfillment that comes from carrying out good deeds.
View Niteco Profile
$50-$99/hr
$10,000+
250 - 999
London, UK
0.0 (0 Reviews)
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
17
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Top Software, Web & App Development Company in UK
Vrinsoft is a UK-based software and mobile app development company that specializes in mobile app development, web development, custom software solutions, and digital transformation services. They cater to businesses of all sizes, from SMEs to large enterprises in finance, logistics, healthcare, and e-commerce. With over a decade of experience, Vrinsoft has completed over 600 projects, ensuring timely and budget-friendly delivery. With over 400 clients worldwide, including startups and established enterprises, Vrinsoft has earned their trust for ongoing support and new projects.
View Vrinsoft UK Profile
$25-$49/hr
$10,000+
50 - 249
London, UK
0.0 (0 Reviews)
13
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
13
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Ai Driven Digital Marketing Agency in UK
Right Media UK, a results-driven digital marketing firm based in London, UK, was established in 2021 and is expanding internationally thanks to its Dubai branch and clientele. The agency's performance-first approach enables businesses to grow effectively through data-driven tactics, sophisticated analytics, and execution that is conversion-focused.
View Right Media UK Profile
$25-$49/hr
$1,000+
10 - 49
London, UK
0.0 (0 Reviews)
0.0 (0 Reviews)
6
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
6
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
We build shops that help you sell more online
With over 15 years of eCommerce expertise, we help enterprises design, build, and scale high-performance digital commerce platforms. Our team has delivered complex, enterprise-grade solutions for leading UK brands across retail, luxury, and entertainment, using agile methodologies to ensure speed, flexibility, and measurable results. We prioritize transparency, collaboration, and business alignment—working closely with your team to define strategy, select the right technology, and execute solutions that support your long-term goals. Rather than a traditional vendor, we act as an extension of your organization. From initial concept to launch and beyond, we provide hands-on support to accelerate delivery and reduce risk. Our goal is to empower your team with the tools, knowledge, and confidence to manage and evolve your platform independently—ensuring sustainable growth and long-term success.
View Cabiri Profile
N/A
$1,000+
10 - 49
London, UK
0.0 (0 Reviews)
1
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
1
SF Score
SF Score is calculated using our SARM methodology to evaluate agency expertise, market presence, and overall credibility. View Ranking Methodology
Driving Innovative Growth
SEO Reforms is a results-oriented digital marketing agency delivering SEO, PPC, content marketing, social media, and web development since 2018. Trusted by 1,000+ satisfied clients globally, the agency drives sustainable organic traffic and qualified leads through transparent, data-driven strategies — making enterprise-grade digital marketing accessible to businesses of all sizes.
View SEO Reforms Profile
$50-$99/hr
$1,000+
10 - 49
London, UK
Why Companies Trust SelectedFirms?
SelectedFirms bridges the gap between businesses and digital service providers as a trusted B2B research and listing platform. With the trust of 14,000+ companies and a growing community of 1M+ users, we empower businesses with reliable insights to make confident decisions.
Human-verified companies
We manually review companies to ensure they meet our quality standards before they appear on the platform.
Research-driven rankings
We rank companies using a clear ranking methodology based on real client feedback, expertise, market credibility, and how well teams execute — not hype.
Always up-to-date insights
We regularly refresh listings with new reviews, case study updates, and market changes to keep decisions relevant.
Verified credibility signals
From verified badges to editorial reviews, we highlight companies that show real commitment to quality and transparency.
