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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121$10,000+2 - 9 employeesBristol , EnglandUser experience company 3Sixty is headquartered in Bristol , England. They provide UX/UI Design and Conversion Optimization.Read More
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122$5,000+2 - 9 employeesBelfast, Northern IrelandFounded in 2006, Vertical Structure is a cloud consulting & SI company. The team specializes in cloud consulting & SI and Cybersecurity.Read More
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123$1,000+50 - 249 employeesPune, IndiaCustom software development company Hardcastle GIS was launched in 2011. The team provides Custom Software Development and Application Testing.Read More
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124$100,000+50 - 249 employeesRichmond upon Thames, EnglandEstafet is a midsize custom software development firm. Launched in 2002, the team provides Custom Software Development and Artificial Intelligence.Read More
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125$5,000+250 - 999 employeesNether Poppleton, EnglandTrustmarque Solutions Ltd is a Nether Poppleton, England-based big data company. They offer BI & big data consulting & SI and cloud consulting & SI.Read More
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126Undisclosed2 - 9 employeesGlasgow, ScotlandOrvio is a social media marketing company. The small Glasgow, Scotland-based team specializes in Social Media Marketing and Conversion Optimization. The company was established in 2016.Read More
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127$5,000+50 - 249 employeesSheffield, EnglandNimble Approach is a midsize Digital Engineering company located in Sheffield, England and Leeds, England. Their services include Digital Engineering and Custom Software Development.Read More
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128$10,000+50 - 249 employeesLondon, EnglandAecor is a midsize London, England-based UX design agency. The team specializes in UX/UI Design and Custom Software Development.Read More
Clients
Prolius, Island Energy Group, Insite Energy, Paysme, Eurosporting, Pitchero, Met Systems, DRSI, Bite IT, Instalcomm, Polpo, TQG, SPX FlowIndustries
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129Undisclosed250 - 999 employeesCity of London, EnglandLocated in Philadelphia, Pennsylvania and City of London, England, Invent Analytics is an AI company. They specialize in Artificial Intelligence and Application Testing.Read More
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130$10,000+50 - 249 employeesNewcastle upon Tyne, EnglandEstablished in 2013, Malleum is a midsize Ottawa, Canada-based cloud consulting & SI company. Their services include cloud consulting & SI and Cybersecurity.Read More
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131$10,000+2 - 9 employeesHuddersfield, EnglandOffroadcode Limited is an UX design company. Their small team is headquartered in Huddersfield, England. Their team focuses on UX/UI Design and E-Commerce Development.Read More
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132$5,000+10 - 49 employeesStanwell, EnglandQuirinus Solutions Ltd is a software development company. Located in Stanwell, England, the firm was launched in 2017. Their team provides Custom Software Development and E-Commerce Development.Read More
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133Undisclosed2 - 9 employeesLondon, EnglandFounded in 2020, Cyber Sense Limited is a Cybersecurity company. The team offers Cybersecurity and Application Testing.Read More
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134Undisclosed2 - 9 employeesCardiff, WalesHeadquartered in Cardiff, Wales, LUMA Solutions is an IT managed services company. The team provides IT managed services and Application Testing.Read More
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135$5,000+10 - 49 employeesEdinburgh, ScotlandCIVIC is an user experience agency launched in 2001. The small team focuses on UX/UI Design and Web Development.Read More
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136Undisclosed10 - 49 employeesLondon, EnglandHeadquartered in London, England and Amsterdam, Netherlands, Maxima Compliance is a Business Consulting company. Their services include Business Consulting and other IT consulting and SI.Read More
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137Undisclosed2 - 9 employeesLondon, EnglandCybersecurity company Cyber Legion was launched in 2021. Located in London, England, the team offers Cybersecurity and Application Testing.Read More
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138Undisclosed10 - 49 employeesNorwich, EnglandLaunched in 2017, Serious Software is a software development firm. The company offers Custom Software Development and Web Development, and is small.Read More
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139Undisclosed2 - 9 employeesBedford, EnglandTappable Agency is an UX company. Launched in 2011, the agency is headquartered in Bedford, England. Their team offers UX/UI Design and Web Development.Read More
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140$5,000+2 - 9 employeesLondon, EnglandCode Development Ltd. Is a custom software development firm. The London, England-based company provides Custom Software Development and Application Testing.Read More
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141$1,000+2 - 9 employeesSheffield , EnglandCEESourcingLtd, an IT managed services company, was launched in 2018. The firm focuses on IT managed services and Application Testing, and is small.Read More
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142Undisclosed50 - 249 employeesWythenshawe, EnglandSGBI Inc is an artificial intelligence company founded in 2021. The firm provides Artificial Intelligence and Application Testing, and is midsize.Read More
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143Undisclosed50 - 249 employeesCity of London, EnglandWorksoft is an Application Testing company. Founded in 1998, the team focuses on Application Testing and IT strategy consulting. The company is in Addison, Texas and City of London, England.Read More
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144Undisclosed50 - 249 employeesCambridge, EnglandGearset is a CRM consulting and SI and Application Testing company. The Chicago, Illinois-based company was launched in 2015. Their team focuses on CRM consulting and SI and Application Testing.Read More
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145Undisclosed50 - 249 employeesNewcastle, Northern IrelandTest Driven Solutions Ltd. Is a software development company and Application Testing company. They provide Custom Software Development and Application Testing and were launched in 2020.Read More
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146Undisclosed50 - 249 employeesLE5 4LE, EnglandInfuse Consulting is a midsize Application Testing company. They focus on Application Testing and DevOps Managed Services and were founded in 2002.Read More
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147Undisclosed50 - 249 employeesLondon, EnglandApplication Testing and Robotics Process Automation company Resolve Systems was launched in 2014. The team focuses on Application Testing and Robotics Process Automation.Read More
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148Undisclosed1,000 - 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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149UndisclosedFreelancer employeesCity of London, EnglandCA Software Testing is an Application Testing company established in 2018. The team focuses on Application Testing.Read More
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150UndisclosedFreelancer employeesLondon, England, EnglandTR Seeds Ltd is an Application Testing company. Established in 2019, their team focuses on Application Testing.Read More
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