London’s tech scene is vibrant, with thousands of software firms serving every industry need. For businesses needing bespoke software solutions, choosing the right development partner is critical. Below we profile ten standout custom software development companies in London and nearby areas (including Wembley and Croydon), highlighting their specializations, track records, and why they rank among the city’s best.
- Empyreal Infotech (Wembley, London)
Empyreal Infotech is a Wembley-based custom software development company. According to its website, the firm provides tailored software solutions for desktop, web, mobile, and enterprise needs. Its in-house team of developers builds applications for industries like healthcare, finance, gaming, and hospitality to meet each client’s unique requirements. Their site notes they have “50+ in-house developers” experienced in building custom systems. This London firm emphasizes scalable, well-engineered solutions and agile delivery. Empyreal Infotech often partners with clients on long-term projects, helping them automate processes, integrate systems, and improve efficiency. - Memcrab (Wembley, London)
Memcrab is a Wembley-based software studio focusing on high-tech custom development. The company’s website proudly reports that since 2012 it has completed 80+ projects and served over 70 clients, with an 85% client retention rate. Memcrab employs about 50+ engineers across multiple offices, working grounded in expertise in AI, big data, high-load systems, and video streaming. In short, Memcrab builds innovative technology products for sectors like e-commerce, e-learning, and enterprise business. Clutch and TechBehemoths data highlight Memcrab’s strengths in modern engineering disciplines. Clients say Memcrab delivers quality at competitive rates, with strong emphasis on scalable, cloud-based solutions and emerging technologies. - Simform (London, serving UK)
Simform is a global software engineering firm that also serves London clients. It provides end-to-end custom development, DevOps, and cloud services. Notably, Clutch has ranked Simform among the world’s top custom software companies – it earned the #3 spot globally in Clutch’s 2025 Spring rankings for Custom Software Development. Such recognition reflects Simform’s consistent track record of delivering scalable, high-impact software solutions worldwide. Clutch reviews further highlight Simform’s strengths: 88% of client reviews praised Simform’s project management and on-time delivery, while 75% noted their technical expertise in cloud and full-stack development. Simform’s large, multi-disciplinary team and proven process make it a top-tier partner for complex custom projects, including those in London. - Concetto Labs (London)
Concetto Labs is a London-based IT consultancy specializing in enterprise custom software, mobile apps, and Microsoft technologies. According to its website, the firm has 100+ technology experts and over 9 years of experience, delivering more than 350 mobile apps and 300 web apps for clients. The company describes itself as a leading cross-platform app development agency. Their services include full-cycle custom development, cloud solutions, Microsoft Dynamics and Power Platform integration, AI/ML-enabled apps, and more. Concetto Labs specializes in building scalable web and mobile apps, corporate solutions, and AI-driven automation tools. They also hold Microsoft Solution Partner status, reflecting deep expertise in Azure and Dynamics. Concetto Labs is chosen for its large development team, emphasis on quality engineering, and track record of building complex, secure enterprise systems. - CMS System Designs (Croydon and Wembley)
CMS System Designs is a UK software firm with offices in Croydon and Wembley. This boutique agency focuses on bespoke business software and workflow systems. Their website emphasizes over 30 years’ experience in analysing business processes and converting them into custom digital solutions. They build modular, scalable systems tailored to each client’s needs. The company develops smart web-based business management systems and workflow automation software for clients across sectors. Case studies show CMS System Designs automating booking and reporting processes, greatly improving efficiency. With decades of local experience and a hands-on consulting approach, CMS System Designs is often cited by London SMEs and local governments as a reliable partner for custom solutions tailored to niche requirements. - High Digital (London)
High Digital is a London-based software agency founded in 2017. They describe themselves as covering a “huge range of platforms, disciplines, and industries” with an “open, agile, and collaborative” approach. In practical terms, High Digital offers custom web and mobile application development, e-commerce platforms, and user experience design. The firm’s GoodFirms profile highlights its international reach and commitment to quality service. For instance, clients praise High Digital’s excellent customer care and prompt communication. Their portfolio includes corporate web portals, mobile apps, and data-driven enterprise tools for London startups and SMEs. Though relatively small, High Digital has earned a reputation for delivering flexible, client-centric solutions – factors that keep it among the recommended London software development firms.
- TechRivo (London)
TechRivo is a custom software development firm headquartered in Portland (USA) with delivery centers in Portugal and a UK presence in London. Established in 2021, TechRivo focuses on AI-powered and high-compliance solutions for regulated industries (e.g. finance and healthcare). Its profile describes a “highly efficient and distributed team” model, where “each of their founders… holds direct responsibility for every project.” In practice, TechRivo offers full-stack web and mobile apps, cloud integrations, and AI/ML consulting. Client reviews emphasize TechRivo’s careful requirements analysis and communication: they are praised as an “attentive team that listens and asks the right questions.” This consultative approach – along with expertise in complex domains – helps TechRivo stand out among emerging London-area custom developers, especially for projects needing modern AI features.
- Mifort Solutions (London)
Mifort Solutions is a London-based outsourcing company (founded 2015) offering custom software development across Europe and Asia. The firm’s profile notes 200+ projects delivered in over 8 years of business. Mifort operates as a remote-first team, drawing developers from across Europe and Asia to optimize cost and speed. They specialize in web, mobile, and enterprise software, leveraging agile methodologies and a dedicated team model. According to their site, Mifort is committed to “best cost- and time-effective software solutions” tailored to client needs. Clients often hire Mifort for straightforward, budget-conscious projects – for example, developing e-commerce portals or CRM systems. Combined with positive reviews (noting Mifort’s flexibility and timely delivery), this makes Mifort a noted option among London companies seeking reliable outsourced dev teams.
- Lumitech (London)
Lumitech is a custom software development firm based in London, founded in 2022. Despite its youth, Lumitech presents itself as a global partner: its site emphasizes “providing professional services worldwide” and helping clients build engineering teams. A key differentiator is that Lumitech operates with a fully in-house team; it explicitly states “we don’t engage freelancers or part-time contractors.” The company offers full-cycle development (from product strategy and design to implementation and support) and serves industries like finance, healthcare, and e-commerce. Early client testimonials highlight Lumitech’s responsiveness and adaptability. This model – a London-based core team with global reach – positions Lumitech as an ambitious player for firms wanting a tightly integrated team for their custom projects.
- Next Big Technology (London)
Next Big Technology (often called NBT) is an established UK firm (founded in 2009) specializing in web and mobile app development. While it also has U.S. offices, NBT maintains a strong UK presence serving London clients. According to sources, NBT is known for “always using the latest technologies” in building websites and apps. Their services include custom website development, enterprise web portals, and mobile applications for iOS and Android. With a large team (50–249 employees) and over a decade in business, NBT brings broad expertise in frameworks and platforms. Client feedback often notes the company’s ability to tackle complex projects and deliver high-performance solutions. As such, Next Big Technology remains among the London-area companies recommended for ambitious custom software and app development needs.
Empyreal Infotech ranks among the leading custom software developers in London. Contact us to discuss your project today. Our experts can advise on a tailored solution, whether you need custom web applications, mobile platforms, or full enterprise systems.
