Top 100 Software Testing Companies in the United Kingdom
The Best of December 2025Looking for a top software QA company in the United Kingdom?
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 United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United Kingdom 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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271$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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272Undisclosed50 - 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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273UndisclosedFreelancer employeesThurmaston, EnglandPactum Consulting Ltd, a Cybersecurity company, is based in Thurmaston, England. The team provides Cybersecurity and IT managed services.Read More
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274UndisclosedFreelancer 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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275UndisclosedFreelancer 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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276Undisclosed50 - 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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277Undisclosed50 - 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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278Undisclosed50 - 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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279UndisclosedFreelancer 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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280Undisclosed50 - 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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281$10,000+10 - 49 employeesBristol , EnglandGibe Digital is a branding firm launched in 2009. The agency specializes in Branding and Digital Strategy, and is small.Read More
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282$10,000+10 - 49 employeesNewcastle , Northern IrelandGospelware is a small app development firm based in Newcastle , Northern Ireland. Their services include Mobile App Development and UX/UI Design.Read More
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283Undisclosed10 - 49 employeesEdinburgh, ScotlandBrainnwave is a big data company. Established in 2014, their team offers BI & big data consulting & SI and Artificial Intelligence.Read More
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284Undisclosed10 - 49 employeesRG1 1LX, EnglandShift Left Group is an IT strategy consulting company. Launched in 2015, the team provides IT strategy consulting and cloud consulting & SI.Read More
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285Undisclosed10 - 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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286Undisclosed10 - 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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287$10,000+2 - 9 employeesWallingford, EnglandZanzi Digital is a Digital Strategy company founded in 2015. The team focuses on Digital Strategy and Conversion Optimization.Read More
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288Undisclosed2 - 9 employeesEdinburgh, ScotlandEstablished in 2010, Devious Solutions is a software development firm. The agency focuses on Custom Software Development and Mobile App Development.Read More
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289Undisclosed2 - 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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290Undisclosed2 - 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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291Undisclosed2 - 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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292Undisclosed2 - 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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293Undisclosed2 - 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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294Undisclosed2 - 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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295Undisclosed2 - 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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