Top 100 Usability Testing Companies in London

Hex Digital, an advertising company, is headquartered in London, United Kingdom. The small company was launched in 2008. Their services include advertising, custom software development, ux/ui design, branding, and more.

Founded in 2009, Lightflows is a development company based in Guildford, U.K. They primarily work with midmarket clients from various industries including advertising, marketing, business services, consumer products, finance, and healthcare. 

Supercharge is a digital production firm that is headquartered in Budapest, Hungary with a second office in London. Founded in 2010, Supercharge's team of more than 100 employees specializes in web and mobile app development. The firm also offers UI/UX design services to its clients.  

Small user experience design company Earthr, is in İzmir, Turkey. The team provides ux/ui design, web design, product design, and branding.

Parkside Interactive is a software company founded in 2007 with more than 50 members. They provide custom software development,  enterprise app modernization, and UX/UI design services from their office in Graz, Austria. They work primarily with small businesses.

Furthermore is a digital transformation agency located in London. Founded in 2013, they employ five staff specializing in service design and product strategy for small and midmarket companies, typically in education, health and hospitality. Services include business transformations, design experiments, content strategy, data analysis, and front-end and app prototyping.

Catch is a digital experience agency founded in 2007. Based in London, United Kingdom, they also have an office in Madrid, Spain, and a team of over 30 employees. They specialize in web development, UX/UI design, and content marketing. 

Established in 2017, Growthcurve is a conversion optimization company. They are based in London, United Kingdom and have a small team. The agency focuses on conversion optimization, mobile & app marketing, pay per click, and social media marketing.

Located in London, UK, Digivate is a digital marketing and SEO agency that specializes in social media advertising, content marketing, SEO, and PPC. Founded in 1988, Digivate works with a variety of clients across industries.

Together is a full-service agency that builds brands, websites and digital products for good tech companies around the world.

CodeLeap is a London, United Kingdom-based application development firm. The small team specializes in mobile app development, web development, Artificial Intelligence, AR/VR development, and more. The company was founded in 2019.

STAKK is a London-based mobile app company founded in 2020. With fewer than 50 employees, they specialize in mobile app development, web development, and UX/UI design for clients that work in various industries, such as IT, business services, and the government.

ustwo is a digital design studio based in London with around 250 employees. Since its start in 2004, the team has provided web design and development, e-commerce development, mobile development, and UX/UI design services for large companies in a variety of industries.  

Sonin is a mobile app development agency based in Reigate, England, and was founded in 2008. Their team of 28 employees specializes in mobile app development, web development, and UX/UI design.

Powercode is a web development agency based in Kyiv, Ukraine founded in 2015. They are operated by a team of 66 who are experts in web, mobile app, and custom software development for clients ranging from startups to enterprises. They have experience working in industries such as financial services, business services, and IT. They are also familiar with working with platforms like Amazon, Linux servers, and Azure, among others.

Signifly is a digital design and development agency headquartered in Montreal, Canada, with an office in Copenhagen. Since 2010, their team of about 30 has expertise in digital strategy, UX/UI design, and e-commerce development. 

Passionate, a web design company, was established in 2018. The firm focuses on web design, ux/ui design, logo, custom software development, and more and has a small team.

Digiruu is a digital firm founded in 2016 run by a team of fewer than 10 professionals. Based in London, the company lends their expertise in mobile app development, UX/UI design, and web design to clients ranging from startups to large enterprises, working in various industries such as consumer products, advertising, and media.

Hue&machine, an UX agency, is located in London, United Kingdom. They specialize in ux/ui design, custom software development, web design, and web development and were founded in 2020.

Thinslices is a web development company. They are headquartered in Iasi, Romania and have a midsize team that offers web development, mobile app development, and ux/ui design. The agency was established in 2010.

NU Creative is a London, United Kingdom-based branding company. They offer branding, email marketing, advertising, graphic design, and more and were launched in 2004.

Founded in 2004, HeadChannel is a software development firm that offers custom software development, web development, and mobile app development services to their small business and mid-market clients in the IT industry. Their 50 employees are based out of offices in London and Katowice, Poland.

Fellow Studio is a small branding firm. The London, United Kingdom-based company was established in 2012. Their services include branding, graphic design, print design, and web design.

Seahawk Media is a web design and development company based in Boston, but with offices around the world. Founded in 2015, they also provide SEO, branding, and UX/UI design services. They're also a GoDaddy partner.

In London, United Kingdom, Main Menu is a software development firm. The small team offers custom software development, web development, web design, ux/ui design, and more. The agency was launched in 2009.

Incepteo is an innovation-led ‘IDEA TO MARKET’ technology services firm providing 360-degree offerings starting from software development, hosting, support, and digital marketing. Our mantra is to deliver growth outcomes with entrepreneurial vision, effective user experience, and innovation. We bring start-up know-how, corporate maturity, and strategic techno- entrepreneurial experience on the table from inception to growth phases.

Fourmeta is an e-commerce development firm founded in 2017. In London, United Kingdom, their midsize team offers e-commerce development, ux/ui design, and web development.

Impact Media is an enterprise-level WordPress web design and support agency based in Wickford, UK, with an office in Shoreditch, UK. The agency, founded in 2003, is a team of less than ten who provide WordPress web development and design, and UX/UI design services to small and midmarket companies. 

Digital agency Mediablaze is based in London. Since it was founded in 2010, the agency has grown its team to 29 employees. Mediablaze specializes in content marketing, web development, mobile app development.

Mobcoder is a software development company based in Seattle. They also have an office in Noida, India. Founded in 2014, their team of 40 employees provides mobile app development, custom software, and web development services to its midmarket and small business clients. They also serve enterprise clients.