Top Web App Development Agencies in City of Westminster

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Web Application England Greater London City of Westminster

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Top Featured Web App Development Agencies

TRIARE
4.9
(11 reviews)
TRIARE unlocks IT potential of YOUR business
TRIARE is a WEB and MOBILE software development company based in Europe. We are delighted to offer our services as your long-term partner, taking all technical matters off your shoulders and allowing you to focus on your business development. YOU WILL GET: ✔ In-house team . Work with a dedicated team that is 100% focused on your product and located in the same office. ✔ Efficiency & transparency , as our process is based on Scrum methodology and managed by certified Scrum Masters. ✔ Fast result. Working with us, you will get the first result in 1 week. ✔ High quality, as TRIARE has well-established processes of software development and experienced specialists. ✔ Full cycle development . Our company covers all stages of development, handling everything from Discovery and prototyping to Design, development, and maintenance. ✔ IP rights . From the very beginning, you are the only owner of the intellectual property of your project materials: source code, design, documentation, etc. ✔ Warranty period will be provided for your system for free. ASPECTS OF OUR MINDSET: - Focused on results. We are focused on the result of your business with an understanding of the real goals and KPIs that our team should achieve. - Solution Provider. It means that we always come to you with solutions, not with questions. We take all technical aspects of the project off your shoulders, allowing you to focus on the marketing and business strategies. - We go the extra mile. Being a proactive company, we always think and take a step ahead. TECHNOLOGIES WE USE: - Mobile app development: Kotlin, Java, Swift, Objective-C. - Cross-platform development: Flutter, React Native. - Web frameworks: Node.JS, React.JS, PHP, Ruby on Rails.
19 works in Web Application
Located in Cherkasy, Ukraine (+3)
From €10,000 for Web Application
Worked in Hospitals & Healthcare (+20)
Speaks English, Ukrainian
51-200 members
The Weather
4.9
(45 reviews)
No-nonsense digital transformation for forward-thinking brands
Highly recommended
Top awarded
🇬🇧 The Weather is an award-winning digital agency and one of Germany's top-ranking companies for web design and web development. We design, build and brand — websites, digital products and AI applications — for companies that expect results. Based in Berlin, delivering worldwide. We have created over 200 websites for tech startups, green energy clients, democracy-focused NGOs, and progressive brands. Their digital transformation has paid for itself — and yours should too. The Weather is the #1 web design company in Germany on Clutch. Seven of our websites received nominations on Awwwards.com. Our web experiences change entire businesses, one website at a time. See the proof. Web design Our high-impact design websites and digital experiences are designed to spark action and build momentum. Discovery & digital advisory Websites UI/UX Figma Web apps Mobile apps Motion design 3D animations Web development We develop future-proof websites and software that are result-oriented and easy to live with. WordPress and Elementor Webflow Jamstack, Headless CMS Mobile apps Web apps Support and maintenance Brand construction With a strong focus on storytelling, we craft distinctive brand and product identities that stand out. Brand guidelines Brand book Idea making Copywriting Illustration Graphic and print design AI development We turn AI from a buzzword into a business asset — practical products built from scratch or integrated into what you already have. AI product strategy & scoping — defining the right problem before a line of code is written AI agents — autonomous agents handling complex, multi-step tasks LLM integration — reliable, scalable integration into existing products and workflows Prototyping & proof of concept — fast, focused builds to test core assumptions Prompt engineering & workflow design — prompts and pipelines that perform in production AI product development — end-to-end, in-house; our own product, Oylo, is proof
8 works in Web Application
Located in Berlin, Germany
From €5,000 for Web Application
Worked in Others (+25)
Speaks English, Catalan(+7)
11-50 members
Cab Engine | Digital Agency
4.9
(5 reviews)
We specialise in building high-performance teams to power your entire marketing engine.
Recommended
A trusted UK agency of 20 years, our unique partnership model has been the foundation for our client's success. Working with brands all over the world, our dedicated digital teams have driven significant results for our clients tech platforms and performance marketing.
4 works in Web Application
Located in Alcester, United Kingdom
From €30,000 for Web Application
Worked in Others (+8)
Speaks English
11-50 members
GRM Digital
5
(5 reviews)
Digital marketing and technology that drives measurable growth.
Top awarded
GRM Digital is an award-winning digital agency helping ambitious businesses generate sustainable growth through SEO, paid media, content, digital strategy and technology. Since 2009, we've worked with organisations to improve their digital visibility, attract the right audiences and turn digital activity into measurable commercial results. Our marketing capabilities include SEO, PPC and paid search, content strategy and creation, digital PR and authority building, analytics, conversion optimisation and wider digital marketing strategy. We don't treat these channels in isolation. Our teams combine marketing expertise with UX, data, design and technology to understand the complete customer journey, from how prospects discover your business through to how they engage, convert and become customers. For organisations looking for an ongoing digital marketing partner, we develop integrated strategies based around clear commercial objectives. This includes understanding your market and competitors, identifying growth opportunities, building the right channel strategy and continuously measuring and improving performance. Unlike agencies focused purely on marketing activation, GRM also has extensive technical expertise across websites, CMS, eCommerce and digital platforms. This allows us to identify and solve the technical, UX and performance issues that can limit marketing results. Whether you need to increase organic visibility, improve paid search performance, create better content, generate more qualified enquiries or build a long-term digital growth strategy, GRM provides the strategy, expertise and ongoing optimisation needed to deliver measurable growth.
3 works in Web Application
Located in Leeds, United Kingdom (+4)
From €20,000 for Web Application
Worked in Education (+6)
Speaks English, Croatian(+2)
11-50 members
Vasilkoff CY LTD
4.9
(14 reviews)
Web, Mobile, Ecommerce & AI Development Company in Cyprus
Highly recommended
Vasilkoff is a Cyprus-based software development company specialising in web development, mobile app development, ecommerce, custom software, AI solutions and digital transformation. Since 2012, our team has helped startups, SMEs and established companies design, build and scale reliable digital products. We combine senior-level development, modern technologies and practical business understanding to deliver solutions that are fast, secure, scalable and easy to maintain. Our services include: * Custom website and web application development * WordPress and WooCommerce development * Shopify and ecommerce development * iOS and Android mobile app development * Custom CRM, ERP and business software * SaaS platforms and marketplaces * API and third-party system integrations * Artificial Intelligence and automation solutions * UI/UX design * Blockchain and Web3 development * Ongoing development, support and maintenance Our technology stack includes React, Next.js, Laravel, PHP, Node.js, WordPress, WooCommerce, Shopify and modern cloud technologies. We work with clients in Cyprus and internationally, providing everything from small business websites to complex custom software platforms and mobile applications. At Vasilkoff, we focus on long-term partnerships, transparent communication and high-quality development. Our goal is not simply to deliver software, but to build digital solutions that help businesses grow, automate operations and create better customer experiences. If you are looking for a reliable web development company, mobile app development team, ecommerce developer or custom software partner in Cyprus, Vasilkoff can take your project from idea to launch and beyond.
12 works in Web Application
Located in Paphos, Cyprus
From €1,000 for Web Application
Worked in Entertainment & Events (+11)
Speaks English, Greek(+1)
11-50 members
Mind Studios
5
(4 reviews)
Long-Term Technology Partner for Growth-Stage and Mid-Market Companies
Recommended
Founded in 2013, Mind Studios is a custom software development company working with growth-stage and mid-market businesses across the US, UK, Europe, and MENA. The portfolio spans logistics platforms, real estate marketplaces, healthcare systems, and fitness ecosystems - operationally critical products built for companies where technology is central to how the business runs. The team engages at the architecture stage, before the critical decisions get locked in. Business analysis, technical scoping, and honest pushback on briefs that won't hold up at scale are standard. The goal from day one is a system that doesn't need to be rebuilt in two years. What distinguishes Mind Studios is what happens after launch. Scaling infrastructure, iterating on features, extending systems as the business grows - this is where most of the value gets built, and where long-term client relationships form. The average engagement runs over two and a half years. Many go considerably longer. 100+ specialists. 13 years in business. 70% client retention rate.
5 works in Web Application
Located in Dnepropetrovsk, Ukraine (+3)
From €20,000 for Web Application
Worked in Logistics & Supply Chain (+5)
Speaks English, Ukrainian
51-200 members
Tallium Inc.
5
(11 reviews)
Fuelled by Excellence. Trusted by Leaders.
Tallium is a trusted partner for product co-creation, taking ideas from concept to award-winning apps through AI-native development and long-term collaboration. We help companies in fintech, edtech, healthtech, retail, logistics and beyond shape, design and build web, mobile and AI products. Our product leaders, senior designers and AI-native software engineers work as one team. We get to know your business and shape the product with you, and then the same team designs, builds and grows it. Everyone on your project is a Tallium employee, and the same people stay with your product for years. You can start with a focused proof of concept to test the idea, show investors or win your first customers with limited risk. As the product gains traction, we grow it into a full product team, and the engineers who already know your code bring new people up to speed. With AI-first engineering, AI agents handle routine coding within the standards we set for your project, and a named senior engineer approves every merge. The same budget covers more of your roadmap. If you can’t share code with an AI model, we use our classic process instead. 120+ people since 2012. Headquartered in Amsterdam, with R&D centers in Kyiv and Rzeszów.
9 works in Web Application
Located in Amsterdam, Netherlands
From €5,000 for Web Application
Worked in Media (+8)
Speaks English, Polish(+4)
51-200 members
OnePix LLC
5
(3 reviews)
Boutique development agency with strategic focus
OnePix is a web development studio working since 2018. We build and support online stores, custom web platforms, internal tools, AI-powered features and mobile apps. Main stack: WordPress and WooCommerce, Shopify, Laravel, React, Vue.js and React Native. We often take over complex existing projects: legacy code, ERP, CRM and payment integrations, slow sites. We work as a technical partner: we review the architecture, flag risks early and plan the work in stages. Many clients stay with us for long-term support. 300+ projects for clients in 36 countries. Calls in English. Documents and written communication in your language.
10 works in Web Application
Located in Miami, United States
From €5,000 for Web Application
Worked in Entertainment & Events (+9)
Speaks English, Dutch(+5)
11-50 members

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