Top 100 Software Testing Companies in London
The Best of December 2025Looking for a top software QA company in London?
Hiring a software testing company is a necessity to both test and improve the services your company offers, especially in an increasingly digital world.
To assist you in your search for a partner, we’ve compiled this list of the top software testing companies in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Software QA Companies
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$5,000+50 - 249 employeesSeattle, WARead More
QA Wolf, an application testing company, was launched in 2019. The company provides application testing and has a small team.
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151$10,000+50 - 249 employeesVinnytsia, UkrainePlexteq, a custom software development company, was established in 2014. Headquartered in Vinnytsia, Ukraine; Tallinn, Estonia and London, England, their midsize team provides Custom Software Development, Enterprise App Modernization, DevOps Managed Services, BI & big data consulting & SI, and more.Read More
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152Undisclosed50 - 249 employeesLondon, EnglandBased in London, England, Tangent Marketing Services is a Digital Strategy company. The team focuses on Digital Strategy and UX/UI Design.Read More
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153Undisclosed50 - 249 employeesCity of London, EnglandCybersecurity company Obrela was founded in 2010. Located in City of London, England, the team specializes in Cybersecurity and BI & big data consulting & SI.Read More
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154Undisclosed50 - 249 employeesLondon, EnglandTelefónica Tech (EN), a Cybersecurity company, is headquartered in London, England. Established in 2019, the team specializes in Cybersecurity and IT managed services.Read More
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155Undisclosed50 - 249 employeesLondon, EnglandFastr is a Content Marketing company. They are in Boston, Massachusetts and Toronto, Canada, and their services include Content Marketing and Mobile & App Marketing.Read More
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156Undisclosed50 - 249 employeesLondon, EnglandSadup Softech, a web design company, was established in 2019. The team provides Web Design and UX/UI Design and is headquartered in Duluth, Georgia and Hyderabad, India.Read More
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157$10,000+50 - 249 employeesWokingham, EnglandNextgen Technology, a midsize Application Testing company, is based in Wokingham, England and Itasca, Illinois. The team specializes in Application Testing.Read More
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158Undisclosed10 - 49 employeesLondon, EnglandBramfitt Technology Labs is a London, England-based Cybersecurity company. Their services include Cybersecurity and UX/UI Design.Read More
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159Undisclosed10 - 49 employeesLondon, EnglandLT Harper is a London, England-based cloud consulting & SI company. They focus on cloud consulting & SI and Cybersecurity.Read More
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160Undisclosed50 - 249 employeesLondon, EnglandDATAMTX LLC, a business intelligence company, was launched in 1993. The midsize team specializes in BI & big data consulting & SI and ERP consulting and SI.Read More
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161Undisclosed50 - 249 employeesLondon, EnglandLaunched in 2005, Excelencia is a cloud consulting & SI company. Located in London, England and Austin, Texas, the team provides cloud consulting & SI and ERP consulting and SI.Read More
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162Undisclosed1,000 - 9,999 employeesSan Jose, CASpirent Communications is a Cybersecurity company in San Jose, California and Beijing, China. They offer Cybersecurity and IT managed services and were launched in 1936.Read More
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163$5,000+10 - 49 employeesFarnham, EnglandRead More
Small mobile application development company Appy Ventures, is located in Farnham, United Kingdom and Exeter, United Kingdom. Established in 2012, the team provides mobile app development, ux/ui design, custom software development, application testing, and more.
Clients
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164Undisclosed2 - 9 employeesMiddlesex, EnglandHaley IT Services (LABH UK Ltd), an user experience design company, was launched in 2011. The company offers UX/UI Design and BI & big data consulting & SI, and is small.Read More
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165Undisclosed2 - 9 employeesLondon, EnglandLaunched in 2015, Meta Defence Labs Ltd is a big data company. Their team provides BI & big data consulting & SI and Cybersecurity.Read More
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166Undisclosed2 - 9 employeesLondon, EnglandLaunched in 2012, Blockchain Lab is a Blockchain company. The firm offers Blockchain and Custom Software Development, and is small.Read More
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167Undisclosed2 - 9 employeesCity of London, EnglandHexwired Recruitment, an Advertising company, is located in City of London, England. They focus on Advertising and Cybersecurity and were launched in 2020.Read More
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168Undisclosed2 - 9 employeesCity of London, EnglandCybersecurity company Defensity was launched in 2019. The team specializes in Cybersecurity and IT strategy consulting.Read More
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169Undisclosed2 - 9 employeesLondon, EnglandGood Signals is a Conversion Optimization company established in 2018. Their services include Conversion Optimization and Search Engine Optimization.Read More
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170Undisclosed250 - 999 employeesCity of London, EnglandIdeyaLabs is an Advertising company launched in 2019. Their team offers Advertising and UX/UI Design.Read More
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171Undisclosed250 - 999 employeesLondon, EnglandInsead Tech is a midsize e-commerce development company based in London, England. The team focuses on E-Commerce Development and ERP consulting and SI.Read More
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172Undisclosed50 - 249 employeesThird Avenue Marlow, EnglandDeveloping World Systems Ltd, an Application Testing company, was founded in 1998. They specializes in Application Testing and Enterprise App Modernization.Read More
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173Undisclosed10 - 49 employeesHigh Wycombe, EnglandCirronex is a small High Wycombe, England-based Application Testing company. Their services include Application Testing and Application Management & Support.Read More
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174UndisclosedFreelancer employeesEC3V 3NG, EnglandCybersecurity company Eldentech Limited is in EC3V 3NG, England. Launched in 2018, the team specializes in Cybersecurity and Custom Software Development.Read More
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175UndisclosedFreelancer employeesLondon, EnglandXcina Security Team, a small Cybersecurity company, is in London, England. Their services include Cybersecurity and IT managed services.Read More
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176UndisclosedFreelancer employeesLondon, EnglandVan der Kraken Ltd. Is a Conversion Optimization company. Founded in 2018, the team specializes in Conversion Optimization and Search Engine Optimization. The firm is headquartered in London, England.Read More
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177Undisclosed1,000 - 9,999 employeesReading, EnglandPlanit Testing is an Application Testing company. They were established in 1997, and their services include Application Testing and IT strategy consulting.Read More
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178Undisclosed2 - 9 employeesLondon, EnglandDigital PR is a small SEO services firm in London, England. The team focuses on Search Engine Optimization and Social Media Marketing.Read More
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179$250,000+10,000+ employeesBengaluru, IndiaCloud consulting & SI company ITC Infotech focuses on cloud consulting & SI and ERP consulting and SI. They were launched in 2000.Read More
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180Undisclosed10 - 49 employeesSouthend-on-Sea, EnglandSmall custom software development firm Hyperneph Software, is in Southend-on-Sea, England. Their services include Custom Software Development and Web Development.Read More
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