Top QA & Software Testing Companies in the United Kingdom

Companies seeking QA and software testing services in the United Kingdom need to evaluate factors such as experience with relevant technologies, scalability of testing solutions, and methodological approach to quality assurance. Ensuring alignment with project requirements and compliance standards is critical for selecting a testing partner. SoftPro operates as an international partner serving clients across the UK, providing a range of QA and software testing services designed to support complex and varied development environments.

1. SoftPro

SoftPro is a leading international partner in the field of quality assurance and software testing, offering comprehensive services to clients across various industries. Their expertise is particularly valuable for businesses seeking to enhance their software quality and performance.

The company specializes in .NET and .NET Core development, utilizing C# and Azure technologies to deliver robust and scalable solutions. Their proficiency in enterprise CMS and migration projects further underscores their capability to handle complex software testing and quality assurance needs.

Key Highlights

• Specializes in .NET and .NET Core development.
• Utilizes C# and Azure technologies.
• Proficient in enterprise CMS and migration projects.

Services

• Software Development
• Web Application Development
• Cloud Development
• Artificial Intelligence

Contact Information

Website: soft-pro.pl

Phone: +48 571 282 759

Address: Poland, Warsaw, Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401

LinkedIn: www.linkedin.com/in/kyrylo-o

2. Zoonou

Zoonou is a UK-based software testing and quality assurance company that assists clients in delivering superior software products. Established in 2007, the company offers a comprehensive suite of services, including QA and software testing, digital accessibility, cyber security, and test automation. Their expertise spans various industries, such as public sector, healthcare, and higher education, enabling them to address diverse client needs effectively.

As a 100% employee-owned and B Corp certified organization, Zoonou emphasizes a people-centric approach to business. This structure fosters a culture of accountability and collaboration, ensuring that every team member is invested in the company's success. Their flexible delivery models, including embedded QA, outsourced QA, dedicated QA teams, project-based testing, and nearshore QA support, are tailored to align with clients' specific requirements and workflows.

Key Highlights

• Zoonou became the UK's first software testing company to transition to employee-ownership in 2023.
• The company achieved B Corp certification in 2024, scoring 104.2 out of 200, reflecting high standards of social and environmental performance.
• Zoonou has delivered over 5,000 projects in 15 years, showcasing extensive experience in the field.
• They offer a range of delivery models, including embedded QA, outsourced QA, dedicated QA teams, project-based testing, and nearshore QA support.

Services

• QA and software testing
• Digital accessibility
• Cyber security
• Test automation services

Contact Information

Website: www.zoonou.com

Phone: +44 (0) 1323 433 700

Email: info@zoonou.com

Address: Suite 1, The Workshop, 10-12 St Leonards Road, Eastbourne, East Sussex, BN21 3UH

LinkedIn: https://www.linkedin.com/company/zoonou/

3. WebDepend

WebDepend is an independent software testing company based in the United Kingdom, specializing in comprehensive testing services for websites, mobile applications, and web applications. Established in 2009, they have over 15 years of experience in the field, offering services such as functionality, usability, and compatibility testing across various platforms.

Their clientele ranges from small businesses to global brands, including notable clients like Poundland, Integrate, and David Lloyd Leisure. WebDepend's team comprises experienced testers, many of whom are ISTQB certified, ensuring high-quality testing services tailored to each client's needs.

Key Highlights

• Founded in 2009, WebDepend has over 15 years of experience in software testing.
• Their Testing Manager platform integrates with clients' project management systems for efficient issue tracking.
• WebDepend offers flexible testing services, including on-demand and retained testing options.
• The team includes ISTQB certified testers, ensuring high-quality testing services.

Services

• Ongoing Testing
• Project Testing
• Website Audits
• Testing for Digital Agencies

Contact Information

Website: www.webdepend.co.uk

Address: The Generator Hub, The Gallery, Kings Wharf, The Quay, Exeter, Devon, EX2 4AN, UK

LinkedIn: https://www.linkedin.com/company/webdepend

4. 2i

2i is a UK-based quality assurance and software testing consultancy specializing in complex digital transformations. They offer strategic test consultancy, quality assurance, and AI assurance services to both public and private sectors. Their expertise ensures that organizations can deliver complex changes safely, maintaining control and pace without compromising live services. This focus on high-stakes scenarios, such as ERP implementations and AI transformations, aligns them with the top QA and software testing companies in the United Kingdom.

Key Highlights

• Acquired Planit UK in April 2026, forming the UK's largest pure-play quality assurance business.

• Opened a new delivery centre in Hyderabad, India, to tap into AI and engineering talent.

• Certified as a Great Place To Work® for the fourth consecutive year in 2026.

• Provides independent evaluation for organizations developing or procuring AI, ensuring functionality before deployment.

Services

• Strategic Test Consultancy

• Quality Assurance & Software Testing

• AI Assurance

• ERP Testing

Contact Information

Website: 2itesting.com

Phone: 0131 220 6888

Address: Ardmore House, 40 George Street, Edinburgh, EH2 2LE

LinkedIn: linkedin.com/company/2i-testing

5. QA Tech Ltd

QA Tech Ltd is a London-based consultancy specializing in software quality assurance and engineering services. With over a decade of experience, they have developed and tested software for major global companies, offering both engineering rigor and effective marketing strategies to ambitious businesses.

Key Highlights

• Over a decade of experience in software development and testing.

• Expertise in full-stack application development with comprehensive testing.

• Skilled in both native and cross-platform mobile application development.

• Proficient in AI-powered testing and machine learning QA solutions.

Services

• App Development

• Software Testing

• Technical Resourcing

• DevOps & CI/CD

Contact Information

Website: qatechltd.com

Email: info@qatechltd.co.uk

LinkedIn: linkedin.com/company/qa-tech-consultancy

6. KiwiQA

KiwiQA is a software testing and quality assurance company that offers a comprehensive suite of services to ensure the reliability and performance of software applications. They cater to a diverse clientele, including startups, small businesses, and large enterprises, providing tailored testing solutions to meet specific needs.

Key Highlights

• Recognized as a leading QA & software testing company by VendorLand in 2024.

• Achieved ISO 27001, ISO 27701, and ISO 9001:2015 certifications, demonstrating commitment to quality and security.

• Partnered with Testsigma, an AI-driven test automation platform, to enhance testing capabilities.

• Completed over 2,000 projects, showcasing extensive experience in the field.

Services

• Automation Testing

• Performance Testing

• Mobile Testing

• Security Testing

Contact Information

Website: www.kiwiqa.com

Phone: +61472869800

7. DeviQA

DeviQA is a software testing and quality assurance company that offers a comprehensive suite of services to enhance product reliability, security, and performance. With over 15 years of experience, they provide solutions such as test automation, AI-augmented testing, performance testing, functional testing, regression testing, API testing, and end-to-end testing. Their expertise spans various industries, including healthcare, FinTech, eCommerce, media and entertainment, travel, AdTech, manufacturing, real estate, retail, MarTech, and logistics. DeviQA's team comprises over 300 software QA engineers, delivering more than 600,000 man-days across 300+ clients globally.

Key Highlights

• DeviQA holds ISO 9001:2015, ISO 20000, and ISO 27001 certifications, demonstrating their commitment to quality, service management, and information security.

• They have a 96% industry-leading retention rate, indicating strong client satisfaction and long-term partnerships.

• DeviQA offers flexible engagement models, including QA outsourcing, managed testing, QA consulting, staff augmentation, and QA as a service.

• Their AI-driven approach predicts vulnerabilities before they manifest, reducing post-release defects by up to 30%.

Services

• Test Automation

• AI-Augmented Testing

• Performance Testing

• Functional Testing

Contact Information

Website: deviqa.com

Email: info@deviqa.com

LinkedIn: https://www.linkedin.com/company/deviqa

8. TestFort QA Lab

TestFort QA Lab is a software testing company that specializes in full-cycle quality assurance services, including manual and automated testing, AI-augmented testing, and testing consulting. With over 24 years of experience, they have completed more than 800 projects across various industries, ensuring software products meet the highest standards of quality.

Key Highlights

• ISO 27001 and CMMI Level 3 certified.

• Over 180 QA engineers on staff.

• Expertise in AI and machine learning testing.

• Flexible cooperation models tailored to client needs.

Services

• Full-cycle testing

• Manual Testing

• Automation Testing

• AI-Augmented Testing

Contact Information

Website: testfort.com

Phone: +1 310 388 93 34

LinkedIn: linkedin.com/company/testfort-qa-lab

Conclusion

When selecting a QA and software testing provider in the United Kingdom, consider factors such as industry experience, range of testing services, and specialization areas like automation or AI-driven assurance. SoftPro, as the featured company, offers extensive international experience across various industries, making it a strong candidate for businesses seeking comprehensive quality assurance support. Other firms may appeal based on their consultancy focus, digital transformation expertise, or specialized service portfolios, so aligning their offerings with your specific project needs and sector requirements will help determine the most suitable partner.