# Best Testing and QA Providers in Greater London, England ## How Many Testing and QA Providers Products Does G2 Track? **Total Products under this Category:** 368 ### Category Stats (Aug 2026) - **Average Rating:** 4.76/5 (↑0.01 vs Jul 2026) The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Expleo (+2.02%) - Among all products in this category, Expleo recorded the largest rating increase compared to last month _Last updated: August 06, 2026_ ## How Does G2 Rank Testing and QA Providers Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 800+ Authentic Reviews - 368+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Testing and QA Providers ![G2 Grid® for Testing and QA Providers plotting products by satisfaction and market presence](https://www.g2.com/categories/testing-and-qa/grids.png?focus%5B%5D=100760&focus%5B%5D=96746&focus%5B%5D=27059&focus%5B%5D=103098&focus%5B%5D=106726&focus%5B%5D=1313548&focus%5B%5D=1189289&focus%5B%5D=1704031) Highlighted products: a1qa, DeviQA, TestDevLab, ThinkSys, Simform, BetterQA, Expleo, and Quality Professionals (Q-Pros). Underlying data: [Grid® JSON](https://www.g2.com/categories/testing-and-qa/grids.json?focus%5B%5D=a1qa&focus%5B%5D=deviqa&focus%5B%5D=testdevlab&focus%5B%5D=thinksys&focus%5B%5D=simform&focus%5B%5D=betterqa&focus%5B%5D=expleo&focus%5B%5D=quality-professionals-q-pros) **Sponsored** ### Zamp Zamp is a fully managed sales tax compliance platform designed for modern digital businesses. After regulatory changes pushed enterprise-level complexity onto growing companies, Zamp was built to eliminate the burden entirely. Combining intelligent automation with a dedicated team of tax specialists, Zamp manages calculations, nexus tracking, registrations, filings, and state notices from start to finish. Unlike DIY tax software, Zamp owns both the work and the outcome, providing accuracy, predictable pricing, and ongoing support. The result is simple: businesses remain compliant without building internal tax expertise, allowing finance and operations teams to stay focused on scaling the business instead of managing tax compliance. The landscape of sales tax compliance is intricate and ever-evolving, which can pose significant challenges for businesses of all sizes. Zamp addresses these challenges by automatically monitoring nexus thresholds, tax rates, and reporting requirements across all U.S. states, Canadian provinces, and various international jurisdictions. This ensures that your business remains compliant as it expands, allowing you to focus on growth without the constant worry of changing tax regulations. Zamp caters to a diverse target audience, particularly e-commerce and software businesses that operate across multiple sales channels. One of the key features of Zamp is its dedicated onboarding specialist, who assists in setting up your account and connecting all sales channels accurately from the outset. This personalized approach ensures that every detail is meticulously handled, setting the foundation for smooth operations. The platform offers white-glove service, meaning that Zamp's team takes care of all aspects of sales tax management, including nexus tracking, tax calculations, state registrations, filings, and remittances. This comprehensive service allows businesses to concentrate on their core activities without the distraction of sales tax compliance. Additionally, Zamp provides multi-channel coverage by integrating seamlessly with popular platforms like Shopify, Amazon, Magento, BigCommerce, QuickBooks, and NetSuite, ensuring that tax data flows automatically across all systems. Another significant advantage of Zamp is its risk monitoring and alerts feature, which proactively tracks compliance changes and notifies users before potential issues arise. This proactive approach helps businesses stay ahead of requirements, minimizing the risk of non-compliance. Furthermore, Zamp's transparent pricing structure eliminates hidden fees or unexpected charges, providing a clear and predictable cost for complete sales tax management. As businesses scale their operations, Zamp offers the software and service necessary to maintain compliance and confidence in their sales tax processes. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list_llm&secure%5Bcategory_id%5D=1057&secure%5Bchosen_at%5D=2026-08-07T20%3A36%3A23Z&secure%5Bdisplayable_resource_id%5D=1235&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=retargeted_product&secure%5Bplacement_resource_ids%5D%5B%5D=1302167&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=1302167&secure%5Bresource_id%5D=1057&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Ftesting-and-qa%2Flocations%2Fgreater-london-england-gb&secure%5Btoken%5D=02f411aee0e8f825712efe96b659b254cda5512e311b2ba7fe18f3421f438462&secure%5Burl%5D=https%3A%2F%2Fzamp.com%3Futm_source%3Dg2%26utm_medium%3Dppc&secure%5Burl_type%5D=custom_url) ### [Tapptitude](https://www.g2.com/products/tapptitude/reviews) Tapptitude is a Product Studio that partners with funded startups and established brands to build interactive, mobile-first digital products that people love to use. We work with our clients as Product Partners, supporting them proactively throughout the journey from idea to launching a product and scaling it up. Startups and brands work with us to define their product, design their prototype, develop and iterate their MVP in order to create a successful business. Our process stands out through our early focus on value and close partnerships. We work on each product to identify and create easy acquisition flows, generate value early to retain users, and build a solid infrastructure for scalability. Our workflows are based on lean principles, rapid prototyping techniques and agile development, making us very fast and flexible in iterating value to users. Our solutions for startups: • Product definition • Rapid prototyping • MVP development Our solutions for larger organisations: • Design sprints • UX research and persona design • Evidence-based growth plan Our technical team delivers full-stack implementation solutions, to build Native and React Native products for iOS, Android, Wearable Devices and the Web. Our services include: • Product strategy and definition • UX/UI design • Native and cross-platform Mobile Development • Web & Backend Development • DevOps • AI, Machine learning and Data Science • Manual & Automated QA • Product launch solutions • Product growth We’ve built products for industries like: • IoT • Health • Proptech • Fintech • Marketplaces and retail • Social platforms • Arts, entertainment and culture **Average Rating:** 4.9/5.0 **Total Reviews:** 31 #### Who Is the Company Behind Tapptitude? - **Seller:** [Tapptitude](https://www.g2.com/sellers/tapptitude) - **Year Founded:** 2013 - **HQ Location:** Cluj-Napoca, Cluj - **Twitter:** @Tapptitude 303 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=90f727f1577e15abd378d40c9f277a7a04239a1081ef25ca0dd737dacd475a1f&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ftapptitude&secure%5Burl_type%5D=linkedin_company_website) 34 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 74% Small, 23% Medium #### What Do G2 Reviewers Say About Tapptitude? _AI-generated summary from verified user reviews_ ##### Pros - Users commend Tapptitude for their **high professionalism** , enjoying their knowledgeable and responsive team in the development process. - Users value Tapptitude's **strong execution and collaborative spirit** , resulting in a smooth and effective development process. - Users commend the **quality of execution** from Tapptitude, ensuring reliable and timely project development experiences. - Users value the **fast response times** from Tapptitude, ensuring efficient communication and project management. - Users value Tapptitude's **commitment to collaboration and responsiveness** , enhancing the development process and fostering teamwork. ##### Cons - Users face **communication issues** that can lead to misunderstandings and challenges, especially with language barriers involved. - Users face **lack of communication** that complicates collaboration and creates misunderstandings, particularly due to language barriers. - Users experience **project delays** due to communication challenges and timeline adherence, impacting overall satisfaction with Tapptitude. - Users find **timezone differences challenging** , but Tapptitude's round-the-clock availability helps mitigate the issue. - Users find **time zone issues** challenging, yet appreciate Tapptitude’s round-the-clock availability for support. #### What Are Recent G2 Reviews of Tapptitude? **["Tapptitude Professionals Delivered a Fantastic Solution"](https://www.g2.com/survey_responses/tapptitude-review-12710541)** **Rating:** 5.0/5.0 stars _— Tudor Draghiciu D._ [Read full review](https://www.g2.com/survey_responses/tapptitude-review-12710541) **["Exceptional Service during and after the project + very Fast Support"](https://www.g2.com/survey_responses/tapptitude-review-12179679)** **Rating:** 5.0/5.0 stars _— findmyfitbuddy o._ [Read full review](https://www.g2.com/survey_responses/tapptitude-review-12179679) ### [8th Light](https://www.g2.com/products/8th-light/reviews) We believe software is a craft born out of practice. Through our committed practice, we unlock potential that leads to quality solutions and ambitious work. 8th Light is a team of developers, designers, teachers, learners, users, collaborators, and leaders. We’re crafters, so we care about everything we create, building with integrity and in sustainable ways. And we find and nurture talent differently, prioritizing curiosity and creativity over credentials. By exemplifying the values of humanity, education, and ownership in everything we do, our crafters help clients master the challenges in front of them while building great opportunities ahead. 8th Light is a unique software design and development company, one that accelerates personal growth through challenging and influential work, a supportive culture, and transformative outcomes. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### Who Is the Company Behind 8th Light? - **Seller:** [8th Light](https://www.g2.com/sellers/8th-light) - **Year Founded:** 2006 - **HQ Location:** Chicago, Illinois, United States - **Twitter:** @8thLightInc 3,474 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=dd079802e75747f08122d95ad01e1ec3cb78fc235d8b58279a66f2d10b9d6361&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2F8th-light&secure%5Burl_type%5D=linkedin_company_website) 162 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Large #### What Are Recent G2 Reviews of 8th Light? **[" software development"](https://www.g2.com/survey_responses/8th-light-review-1132399)** **Rating:** 5.0/5.0 stars _— Verified User in Telecommunications_ [Read full review](https://www.g2.com/survey_responses/8th-light-review-1132399) #### What Are G2 Users Discussing About 8th Light? - [What is 8th Light used for?](https://www.g2.com/discussions/what-is-8th-light-used-for) ### [DMI](https://www.g2.com/products/dmi-digital-management-inc-dmi/reviews) DMI is an end-to-end mobility company that combines all the skills and services necessary to deliver mobile enterprise solutions, including mobile strategy, UX, web, and app development, omni-channel commerce, brand and marketing, big data management and analytics, and secure device and app management. #### Who Is the Company Behind DMI? - **Seller:** [DMI - Digital Management](https://www.g2.com/sellers/dmi-digital-management) - **Year Founded:** 2002 - **HQ Location:** McLean, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=600db466f6fff7d17be829f778f88146f776b26aab86c129427273f6b1466fb3&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2F51648&secure%5Burl_type%5D=linkedin_company_website) 2,021 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Medium ### [One Beyond](https://www.g2.com/products/one-beyond/reviews) One Beyond is a multi-award winning bespoke software development company, with Headquarters in Farnborough, Hampshire, and engineering centres of excellence in London, Manchester, Madrid, Seville, Bucharest, Budapest and Szeged. Since 1994, we’ve created intelligent, cost-effective and intuitive web applications, desktop applications and mobile apps for established businesses, non-profits, government organisations and funded start-ups. We have a team of over 300 across our international business. One Beyond delivers large scale digital transformation, team augmentation, delivery of discrete Agile projects and world class bespoke software using complementary tech including, but not limited to, Microsoft .NET, Power BI, React and Node.js. The company’s capabilities also include DevOps proficiency and deployment on Azure and AWS. Accredited with Microsoft Gold Partner status, as well as ISO 9001 & ISO 27001, the firm’s highly competitive services are leveraged through an optimal blend of international delivery centres either UK-based or nearshore, all operating under One Beyond’s best practice methodology and with a partnership approach, to generate consistent and superior quality products and services. #### Who Is the Company Behind One Beyond? - **Seller:** [One Beyond](https://www.g2.com/sellers/one-beyond) - **Year Founded:** 1994 - **HQ Location:** Farnborough, GB - **Twitter:** @OneBeyond\_ 78 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=1a8adee66c2fa69a853ea196542f25f71b07876a7dde1e876c37b412270f05cf&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fonebeyond&secure%5Burl_type%5D=linkedin_company_website) 211 employees on LinkedIn® Spotlight Categories [Quality Management Systems (QMS)](https://www.g2.com/categories/quality-management-qms) [E-Commerce Platforms](https://www.g2.com/categories/e-commerce-platforms) [Professional Services Automation Software](https://www.g2.com/categories/professional-services-automation) [Revenue Operations & Intelligence (RO&I) Software](https://www.g2.com/categories/revenue-operations-intelligence-ro-i) [Operational Risk Management Software](https://www.g2.com/categories/operational-risk-management) Similar Categories - [Blockchain Developers](/categories/blockchain-developers) - [Mobile App Development](/categories/mobile-app-development) - [Other Development Services](/categories/other-development-services) - [Software Developer Services](/categories/software-developer-services) - [Web Developers](/categories/web-developers) ![Adam Crivello](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Adam Crivello") AC Researched and written by [Adam Crivello](https://research.g2.com/insights/author/adam-crivello) Updated October 3, 2024 Testing and quality assurance (QA) is an integral part of the [software development](https://www.g2.com/categories/development-services) process, during which versions of a product are examined for bugs, design flaws, and performance quality as a whole. Many [mobile app developers](https://www.g2.com/categories/mobile-app-development) and [web developers](https://www.g2.com/categories/web-developers) offer testing and QA services as a standard part of the production lifecycle, but businesses can also hire a separate provider for software testing services. Product or development teams within an organization can also perform these tasks in house using [mobile app testing](https://www.g2.com/categories/mobile-app-testing) or [software testing software](https://www.g2.com/categories/software-testing). Show More