Top 100 Usability Testing Companies in London
The Best of December 2025Looking for a top usability testing agency in London?
Usability testing helps companies vet if a product is worth investing time and resources in building. It also helps improve existing products by accounting for user feedback and pain points in design and functionality updates.
For example, let's say you're looking at Analytics and notice visitors to your website often visit one page only. You may hypothesize that your navigation is not user friendly. You could design and develop an updated navigation, or you could hold user tests to vet your hypothesis and get suggestions for navigation features your users need.
User testing may seem time consuming up-front, but it ultimately saves time and money later. For expert assistance, consider hiring a usability testing company. Usability testing services define test scenarios, identify test subjects, conduct the tests, and compile feedback for you.
To assist you in your search for a partner, we’ve compiled this list of the top usability testing companies in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Usability Testing Services
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31$10,000+10 - 49 employeesLondon, EnglandFormat-3 is a small user experience company. Established in 2023, the agency is headquartered in London, England and Nashville, Tennessee. Their services include UX/UI Design, Digital Strategy, Custom Software Development, and Web Development.Read More
Clients
Natural History Museum TripleKey JojoBet DailyWireIndustries
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32$10,000+50 - 249 employeesLondon, EnglandRead More
Rhapsody is a Digital Strategy company founded in 1980. The company focuses on Digital Strategy, Web Design, Branding, E-Commerce Development, and more and has a midsize team. The company is in London, England; Tres Cantos, Spain; Warszawa, Poland and Bijeljina, Bosnia and Herzegovina.
Clients
SpotifyIndustries
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33$10,000+10 - 49 employeesLondon, EnglandHiyield is a web design company. They are located in London, England; Truro, England and Bristol, England and have a small team. Their services include Web Design, UX/UI Design, Custom Software Development, Web Development, and more. The agency was established in 2018.Read More
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34$50,000+10 - 49 employeesBerlin, GermanyBoldheart, a mobile application development firm, was founded in 2020. The agency specializes in Mobile App Development, Custom Software Development, UX/UI Design, IT strategy consulting, and more and has a small team. The agency is in Berlin, Germany; München, Germany; Zürich, Switzerland and Wien, Austria.Read More
Clients
ValoraIndustries
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35$10,000+10 - 49 employeesLondon, EnglandRead More
Plug & Play is a UX/UI agency based in London and Surrey. Founded in 2007, they are specialists in user experience and user interface design for software, websites and custom applications. They also have a front-end development service to support clients with the design implementation. Plug & Play work across a number of sectors with their clients ranging from funded startups to large corporations such as Legal & General.
Clients
WWF Powerleague Give A Grad A Go RSL AwardsIndustries
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36$10,000+2 - 9 employeesLondon, EnglandUniko Studio, a branding agency, was launched in 2022. The company provides branding, web design, ux/ui design, logo, and more and has a small team. The company is based in London, United Kingdom and دبي, United Arab Emirates.Read More
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37$10,000+10 - 49 employeesLondon, EnglandRead More
TopDevs is a small website development company located in London, England and Burnaby, Canada. Launched in 2009, the team specializes in Web Development, Mobile App Development, and UX/UI Design.
Clients
SolocatorIndustries
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38$10,000+50 - 249 employeesL'viv, UkraineRead More
Founded in 2019, Uinno is an artificial intelligence firm. The midsize team specializes in Artificial Intelligence, Custom Software Development, Low/No Code Development, UX/UI Design, and more. The company is based in L'viv, Ukraine; Tallinn, Estonia; Kingston upon Thames, England and Zaporizhzhia, Ukraine.
Clients
OnlyFansIndustries
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39$10,000+10 - 49 employeesLondon, EnglandRead More
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.
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40$5,000+10 - 49 employeesLondon, EnglandRead More
Slick is an UX design agency. The small San Jose, California-based company was founded in 2021. Their team specializes in UX/UI Design, Web Design, and Product Design.
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41$25,000+10 - 49 employeesLondon, EnglandWe Are Kitty is a web design agency. Launched in 2017, the company is in London, England and Cape Town, South Africa. The small team provides Web Design, UX/UI Design, Web Development, E-Commerce Development, and more.Read More
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42$25,000+10 - 49 employeesLondon, EnglandTogether is a branding company launched in 2018. The small team specializes in Branding, UX/UI Design, Product Design, Web Development, and more. The agency is located in London, England; New York, New York and San Francisco, California.Read More
Clients
UnitIndustries
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43$10,000+10 - 49 employeesLondon, EnglandRead More
Cloudflex, a custom software development firm, is in Kyiv, Ukraine. The small team specializes in custom software development, mobile app development, web development, Artificial Intelligence, and more. The firm was founded in 2018.
Clients
YazaIndustries
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44$5,000+10 - 49 employeesLondon, EnglandTH-EY, a custom software development firm, is based in London, England and Kraków, Poland. They offer Custom Software Development, UX/UI Design, Mobile App Development, Application Testing, and more and were launched in 2017.Read More
Clients
LaunchworksIndustries
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45$10,000+2 - 9 employeesLondon, EnglandFellow Studio is a branding agency based in London, England. The small agency was launched in 2012. Their services include Branding, Graphic Design, Web Design, UX/UI Design, and more.Read More
Clients
Travel SentryIndustries
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46$1,000+1,000 - 9,999 employeesLondon, EnglandRead More
Zerocoder is a London, United Kingdom-based software development firm. The large firm was founded in 2023. Their services include custom software development, web development, mobile app development, web design, and more.
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47$25,000+10 - 49 employeesLondon, EnglandHex 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.Read More
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48$25,000+50 - 249 employeesLondon, EnglandWebsite development firm Deeep was established in 2009. The midsize team provides Web Development, Custom Software Development, UX/UI Design, Low/No Code Development, and more. The firm is headquartered in London, England and Dubai, United Arab Emirates.Read More
Clients
Societe Generale Group Emirates NBD Bank SBI Bank 24AI & 24ORMIndustries
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49$5,000+50 - 249 employeesLondon, EnglandPixelfield is an UX design agency in London, England and Praha 8, Czech Republic. The agency focuses on UX/UI Design, Mobile App Development, Web Design, Product Design, and more and has a midsize team.The agency was launched in 2012.Read More
Clients
Raiffeisen BankIndustries
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50$10,000+10 - 49 employeesLondon, EnglandEqual is a São Domingos de Rana, Portugal-based UX agency. The small team focuses on UX/UI Design, Product Design, Custom Software Development, Web Design, and more and was established in 2019.Read More
Clients
Management systems for Hospitality Management systems for Construction Management systems for Logistics Management systems for Energy & UtilityIndustries
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51$10,000+50 - 249 employeesMontréal, CanadaSignifly is a branding company established in 2010. They are located in Montréal, Canada; København, Denmark; Oslo, Norway and Stockholm, Sweden and have a midsize team. The company specializes in Branding, E-Commerce Development, Marketing Strategy, Digital Strategy, and more.Read More
Clients
GoogleIndustries
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52$10,000+10 - 49 employeesLondon, EnglandExperience Dynamics is a Seattle, Washington-based UX design agency. The small team specializes in UX/UI Design and AI Consulting. The agency was established in 2001.Read More
Clients
NikeIndustries
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53$50,000+10 - 49 employeesLondon, EnglandRead More
NEVERBLAND is a web development firm. They provide web development, web design, ux/ui design, custom software development, and more and were launched in 2010. Their small team is London, United Kingdom-based.
Clients
TogetherallIndustries
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54$25,000+50 - 249 employeesCobham, EnglandMobcoder, an IT staff augmentation company, is located in Seattle, Washington; Cobham, England; Ghaziabad, India and Burnaby, Canada. The midsize company was launched in 2014. Their services include IT staff augmentation, Artificial Intelligence, UX/UI Design, BI & big data consulting & SI, and more.Read More
Clients
General millsIndustries
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55$10,000+10 - 49 employeesLondon, EnglandRead More
Glorify Ltd is a small UX company. The London, United Kingdom-based company was founded in 2019. Their team focuses on ux/ui design.
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56$10,000+10 - 49 employeesLondon, EnglandRead More
Located in London, England and Madrid, Spain, Catch is a small Digital Strategy company. They focus on Digital Strategy, UX/UI Design, Web Development, Web Design, and more and were founded in 2007.
Clients
SharpIndustries
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57Undisclosed50 - 249 employeesLondon, EnglandRead More
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.
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58$25,000+10 - 49 employeesLondon, EnglandStakk is an app development firm based in London, England; Wilmington, Delaware; Amsterdam, Netherlands and Orlando, Florida. The small company was launched in 2016. Their services include Mobile App Development, Artificial Intelligence, and UX/UI Design.Read More
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59$10,000+10 - 49 employeesLondon, EnglandRead More
Sell Staged is a London-based web and mobile app development company founded in 2019 with no more than 50 professionals. They specialize in web development, mobile app development, and UX/UI design solutions for clients ranging from small firms to large companies.
Clients
GymCallIndustries
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60$10,000+10 - 49 employeesLondon, EnglandHeadChannel Consulting, a software development company, is based in London, England; Katowice, Poland and New York, New York. The small team provides Custom Software Development, Artificial Intelligence, UX/UI Design, Web Development, and more and was founded in 2004.Read More
Clients
The William Pears GroupIndustries
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