Best Cross-Browser Compatibility Companies in the UK

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    Targets we’ve achieved:
    Increased US Software Development Company's annually acquired clients by 400% *
    Generated 50+ business opportunities for UK Architecture & Design Services Provider *
    Reduced cost per lead by over 6X for Dutch Event Technology Company *
    Reached out to 13,000 target prospects and generated 400 opportunities for Swiss Sports Tech Provider *
    Boosted conversion rate of Ukrainian IT Company by 53.6% *
    Increased US Software Development Company's annually acquired clients by 400% *
    Generated 50+ business opportunities for UK Architecture & Design Services Provider *
    Reduced cost per lead by over 6X for Dutch Event Technology Company *
    Reached out to 13,000 target prospects and generated 400 opportunities for Swiss Sports Tech Provider *
    Boosted conversion rate of Ukrainian IT Company by 53.6% *
    Increased US Software Development Company's annually acquired clients by 400% *
    Generated 50+ business opportunities for UK Architecture & Design Services Provider *
    Reduced cost per lead by over 6X for Dutch Event Technology Company *
    Reached out to 13,000 target prospects and generated 400 opportunities for Swiss Sports Tech Provider *
    Boosted conversion rate of Ukrainian IT Company by 53.6% *
    Increased US Software Development Company's annually acquired clients by 400% *
    Generated 50+ business opportunities for UK Architecture & Design Services Provider *
    Reduced cost per lead by over 6X for Dutch Event Technology Company *
    Reached out to 13,000 target prospects and generated 400 opportunities for Swiss Sports Tech Provider *
    Boosted conversion rate of Ukrainian IT Company by 53.6% *
    Increased US Software Development Company's annually acquired clients by 400% *
    Generated 50+ business opportunities for UK Architecture & Design Services Provider *
    Reduced cost per lead by over 6X for Dutch Event Technology Company *
    Reached out to 13,000 target prospects and generated 400 opportunities for Swiss Sports Tech Provider *
    Boosted conversion rate of Ukrainian IT Company by 53.6% *
    Increased US Software Development Company's annually acquired clients by 400% *
    Generated 50+ business opportunities for UK Architecture & Design Services Provider *
    Reduced cost per lead by over 6X for Dutch Event Technology Company *
    Reached out to 13,000 target prospects and generated 400 opportunities for Swiss Sports Tech Provider *
    Boosted conversion rate of Ukrainian IT Company by 53.6% *
    AI Summary
    Sergii Steshenko
    CEO & Co-Founder @ Lengreo

      Getting a website to look perfect on every browser isn’t as simple as it sounds. Chrome, Safari, Firefox, Edge – they all interpret code slightly differently, and what works on one can break on another. That’s where cross-browser compatibility experts come in. In the UK, some companies have mastered this balancing act, making sure your site performs consistently, looks sharp, and keeps users happy no matter how they access it.

      1. LenGreo

      1. LenGreo

      We approach cross-browser compatibility with the same mindset we bring to all of our web development projects: practicality, testing, and adaptability. In the UK, users switch between Chrome, Safari, Edge, and Firefox on a daily basis, and even small rendering issues can disrupt their experience. That’s why we build and test websites in multiple environments before launch, ensuring layouts, features, and interactions behave consistently. Our focus is on creating sites that function reliably, not just in ideal conditions, but across the varied browsers people actually use.

      We’ve seen that compatibility isn’t only a technical concern, it’s also tied to business performance. A glitchy checkout on one browser or a broken layout on another can mean lost customers. By taking cross-browser testing as a core part of our process, we reduce those risks for UK businesses. Whether we’re building eCommerce sites, business platforms, or landing pages, we work step by step, combining research, design, development, and quality assurance to deliver a website that holds up no matter how it’s accessed.

       

      Key Highlights:

      • Focus on functionality across major browsers in the UK market
      • Integration of testing into each stage of development
      • Emphasis on performance and user experience consistency
      • Practical approach to reducing risks from browser-based errors

       

      Services:

      • Website development and implementation
      • Business analysis and research for tailored solutions
      • Prototyping and design with compatibility in mind
      • Quality assurance and ongoing support
      • SEO and content planning aligned with web performance

       

      Contacts:

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      2. Inogen

      2. Inogen

      Inogen puts cross-browser compatibility front and center. They know new browsers and devices pop up all the time, and websites need to stay reliable no matter what platform people use. Instead of assuming everyone uses the same setup, they test sites on Chrome, Safari, Edge, and even the less common ones.

      For UK businesses, a site that loads consistently across browsers builds trust and confidence with users. Inogen combine standards-based coding with audits and acceptance testing, making sure sites look right and behave as expected. They connect design, usability, and technical compliance to keep websites running smoothly for a wide range of users.

       

      Key Highlights:

      • Focus on ensuring interoperability across major browsers
      • Ongoing testing methods to maintain compatibility
      • Attention to web standards and accessibility requirements
      • Practical audits and acceptance testing for reliability

       

      Services:

      • Web design and development
      • SEO and content management solutions
      • E-commerce website development
      • Web hosting and maintenance
      • Site audits and standards-based coding
      • Copywriting and accessibility support

       

      Contacts:

      • Website: inogen.co.uk
      • E-mail: info@inogen.co.uk
      • Address: 49 Shaw Street Ruddington Nottingham NG11 6HF
      • Phone: (0845) 165 0310

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        3. Pedalo

        3. Pedalo

        Pedalo see browser compatibility as an ongoing effort, not a one-off check. Websites can behave differently depending on the browser or device, so they focus on continuous testing, updates, and adjustments. Their goal is to keep the user experience consistent whether someone is on Chrome, Safari, Firefox, or even older browsers.

        They also use analytics and testing tools to figure out which platforms matter most for a specific audience. In the UK, where users rely on a mix of modern and legacy browsers, this helps keep sites functional and accessible. Pedalo stick to simple, clean coding practices to minimise errors and make maintenance easier.

         

        Key Highlights:

        • Emphasis on consistent performance across modern and legacy browsers
        • Ongoing testing built into updates and site maintenance
        • Use of browser compatibility tools to detect issues early
        • Analytics-based prioritisation of browsers and devices
        • Simplified coding practices to reduce errors and improve stability

         

        Services:

        • Web design and development
        • WordPress and Drupal solutions
        • Site audits and performance improvements
        • Browser compatibility testing and support
        • Accessibility and usability enhancements

         

        Contacts:

        • Website: www.pedalo.co.uk
        • E-mail: info@pedalo.co.uk
        • Twitter: x.com/pedalowebdesign
        • LinkedIn: uk.linkedin.com/company/pedalo-limited
        • Address: 20-22 Wenlock Road, London N1 7GU
        • Phone: 020 8747 3274
        4. UK Site Design

        4. UK Site Design

        UK Site Design approach cross-browser compatibility with an understanding of how the web has developed over time. They recognise that differences between browsers are not new, tracing back to the so-called browser wars of the late 1990s when each platform introduced features independently without much standardisation. To address this, they lean on established web standards from the W3C, which provide a consistent foundation for coding practices and help reduce the risk of sites breaking when viewed in different browsers. By aligning development with these guidelines, they aim to produce websites that are stable and accessible regardless of version or platform.

        Their perspective is that compatibility is central to usability. A website that performs well in one browser but fails in another disrupts the experience and limits its reach. To prevent this, they use testing methods that check how sites behave across multiple browsers and devices, from handling JavaScript requests to managing responsive layouts. For them, the ongoing task is making sure that websites remain functional as browsers update and evolve, rather than relying on short-term fixes or outdated techniques like browser sniffing.

         

        Key Highlights:

        • Emphasis on web standards and W3C guidelines
        • Testing across different browsers and device types
        • Focus on maintaining usability and functionality
        • Awareness of the history and evolution of browser compatibility
        • Ongoing approach to updates and modernisation

         

        Services:

        • Web design and development
        • Responsive website solutions
        • Browser compatibility testing
        • Standards-based coding practices
        • Website maintenance and updates

         

        Contacts:

        • Website: uksitedesign.co.uk
        • E-mail: studio@uksitedesign.co.uk
        • Address: Pride Media Centre Unit T1 Shields Road Pelaw Gateshead. NE10 0HW
        • Phone: 01912837920
        5. Impact Media

        5. Impact Media

        Impact Media view cross-browser compatibility as a fundamental step in web development rather than an optional add-on. They point out that while a website may function smoothly in one browser, it can present errors or layout issues in another. Their approach to testing is not about covering every browser version that exists, but about focusing on the most relevant platforms based on analytics, market share, and CMS support guidelines. This ensures that sites perform well for real users on the devices and browsers they actually use.

        They also emphasise that compatibility goes beyond visuals. A site that looks fine in one browser may still have accessibility or functional problems in others. To counter this, they combine automated tools with targeted testing, checking layouts, responsiveness, and processes like form submissions or checkouts. Their method is iterative, identifying errors early and resolving them before launch, with retesting built into the workflow to confirm stability across environments.

         

        Key Highlights:

        • Focus on relevant browsers and devices using analytics and CMS support guidance
        • Balance of automated and manual testing approaches
        • Iterative process with early identification and correction of issues
        • Emphasis on accessibility and user experience
        • Testing that covers layout, responsiveness, and functionality

         

        Services:

        • WordPress web design and development
        • Cross-browser compatibility testing
        • Accessibility checks and validation
        • Responsive layout design
        • Ongoing WordPress support and maintenance

         

        Contacts:

        • Website: www.impactmedia.co.uk
        • E-mail: studio@impactmedia.co.uk
        • Facebook: www.facebook.com/impactmedia
        • Twitter: x.com/impactmedia
        • LinkedIn: www.linkedin.com/company/impact-media
        • Instagram: www.instagram.com/impactmedia
        • Address: 50 Liverpool Street London EC2M 7PY
        • Phone: 020 3355 8747
        6. IHM

        6. IHM

        IHM recognise that testing across browsers is one of the more time-consuming aspects of web design, yet it remains unavoidable. With so many versions of browsers like Chrome, Firefox, Safari, Opera, and Internet Explorer still in use, they point out that designers need practical ways to make sure sites look and work properly on all of them. To tackle this, they highlight a mix of testing tools, each serving a slightly different purpose, from quick layout checks to deeper crawling of whole websites.

        While automation helps spot issues faster, they also stress the continued importance of manual testing. Automated tools can flag problems across hundreds of device and browser combinations, but in practice, not every edge case needs to be addressed. Their approach is to focus attention on the browsers people actually use most, combining targeted testing with selective tools to ensure accessibility and consistent functionality without overcomplicating the process.

         

        Key Highlights:

        • Practical focus on major browsers and mobile variants
        • Use of specialised tools for layout, rendering, and performance checks
        • Emphasis on combining automated testing with manual review
        • Testing web applications behind logins as well as standard websites
        • Balanced approach that avoids unnecessary coverage of rare browsers

         

        Services:

        • Web design and development
        • Web applications
        • Content management systems
        • Ecommerce solutions
        • Landing page design
        • Digital marketing and SEO
        • Pay-per-click and social media campaigns
        • Email marketing

         

        Contacts:

        • Website: www.ihm.co.uk
        • E-mail: info@ihm.co.uk
        • Facebook: www.facebook.com/ihmwebdesign
        • Twitter: x.com/ihmwebdesign
        • LinkedIn: www.linkedin.com/company/in-house-media
        • Address: 1 Moulton Park Office Village Scirocco Close Northampton NN3 6AP
        • Phone: 01604 790007
        7. Saxon Websites

        7. Saxon Websites

        Saxon Websites treat cross-browser compatibility as part of their standard design process rather than an optional extra. They point out that a website that only looks right on Chrome or Safari misses the reality that people still use a wide variety of browsers. Their checks are aimed at preventing broken layouts, overlapping elements, or rendering issues that might turn away potential users before they even interact with a page. For them, ensuring consistency across browsers is closely tied to protecting both the client’s reputation and the credibility of the work they deliver.

        Their testing covers the most widely used browsers and versions, acknowledging that it isn’t realistic to optimise for every single niche option. Instead, they focus efforts on the browsers that make up the vast majority of usage. By building with compatibility in mind from the start and then running tests across multiple platforms, they keep later fixes minimal. They also provide proof of testing with screenshots, giving clients a clear view of how their site appears in different environments. In their view, this kind of transparency should be standard practice for any website build.

         

        Key Highlights:

        • Cross-browser testing included as a standard step in every design project
        • Practical focus on the browsers that represent the majority of the market
        • Preventing layout and rendering issues across platforms and devices
        • Compatibility considered during the initial design stage to minimise fixes
        • Clients receive proof of testing with screenshots across environments

         

        Services:

        • Website design and development
        • E-commerce solutions
        • Responsive and scalable design
        • Website security features
        • Cross-browser compatibility checks
        • Use of modern web technologies

         

        Contacts:

        • Website: saxonwebsites.co.uk
        • Phone: 07597 278340
        8. Qniverse

        8. Qniverse

        Qniverse really gets that cross-browser testing isn’t just a box to tick – it’s about making sure your web apps actually work for everyone. Browsers all handle code slightly differently, so what looks perfect in one might break in another. They focus on spotting these glitches early, which saves a ton of headaches later.

        They look at things from the user’s point of view, testing across major browsers, devices, and operating systems. By simulating real-world scenarios, they help ensure everything behaves as expected. It’s a practical approach that keeps users happy and builds trust for the businesses they work with.

         

        Key Highlights:

        • Early identification of browser-specific issues
        • Testing across multiple browsers, devices, and operating systems
        • Focus on real-world user scenarios
        • Reduces development time by catching issues early
        • Supports consistent user experience and brand trust

         

        Services:

        • Cross-browser testing for web applications
        • QA and bug detection
        • Functional testing across platforms
        • Compatibility assessment for devices and browsers
        • Reporting and recommendations for developers
        • Support for ongoing application maintenance

         

        Contacts:

        • Website: qniverse.co.uk
        • Facebook: www.facebook.com/Qniverse-100932742595689
        • LinkedIn: www.linkedin.com/company/qniverse
        • Instagram: www.instagram.com/getqniversed
        • Address: 483 Green Lanes, London, England N13 4BS, GB
        • Phone: 01296328689
        9. Web Alliance

        9. Web Alliance

        Web Alliance treats cross-browser compatibility as a must, not an afterthought. They make a clear distinction between multi-browser (works on a few browsers) and full cross-browser compatibility (works anywhere, any version). Their focus is on testing across the most popular browsers so users always see the site the way it’s meant to be seen.

        They use tools like CloudTesting to spot problems before launch, which cuts down on post-launch fixes. It’s all about giving visitors a smooth, reliable experience and keeping clients’ websites functioning perfectly no matter how people access them.

         

        Key Highlights:

        • Differentiates multi-browser and cross-browser compatibility
        • Testing across major browsers and multiple versions
        • Focus on preventing user-facing issues
        • Uses automated tools for efficient testing
        • Identifies inconsistencies before launch

         

        Services:

        • Web development
        • Software application development
        • Mobile app development
        • Custom CRM and ERP solutions
        • Online portals and custom databases
        • System maintenance and marketing automation

         

        Contacts:

        • Website: www.web-alliance.co.uk
        • E-mail: info@web-alliance.co.uk
        • Facebook: www.facebook.com/pages/Web-Alliance-Limited/434950883246019
        • LinkedIn: www.linkedin.com/company/web-alliance-limited
        • Instagram: www.instagram.com/bespokecrm
        • Address: 3 Duncan Close Moulton Park Industrial Estate, Northampton Northamptonshire, NN3 6WL
        • Phone: 0800 677 1786
        10. Talosmart

        10. Talosmart

        Talosmart is all about making sure websites and web apps work consistently, no matter which browser or device someone uses. They dig into both current and older browser versions, tackling quirks in CSS, JavaScript, and HTML so everything looks and behaves the way it should.

        They’re also big on ongoing maintenance. Browser updates can throw new problems into the mix, so Talosmart keeps an eye on sites over time and optimizes code regularly. It’s a proactive approach that avoids headaches and keeps the user experience solid.

         

        Key Highlights:

        • Testing across multiple browsers and versions
        • Code optimization for CSS, JavaScript, and HTML
        • Continuous monitoring and maintenance
        • Focus on consistent user experience
        • Addresses compatibility issues proactively

         

        Services:

        • Web development
        • Frontend development
        • Mobile application development
        • Graphics and UI/UX design
        • Cloud and DevOps services
        • Backend development
        • Maintenance and support
        • Game development
        • Digital marketing

         

        Contacts:

        • Website: talosmart.com
        • E-mail: talosmart@gmail.com
        • Facebook: www.facebook.com/talosmart
        • LinkedIn: www.linkedin.com/company/talosmart
        • Instagram: www.instagram.com/talosmart
        • Phone: +2348060494409
        11. Off The Peg Design

        11. Off The Peg Design

        Off The Peg Design knows the web is messy. Even small differences in how browsers handle HTML, CSS, and JavaScript can create display headaches. That’s why they test sites on multiple browsers, both desktop and mobile, to make sure everything renders correctly and works smoothly.

        They also pay attention to the little stuff – tiny code errors can mess up user experience. By focusing on both desktop and mobile environments, they aim to minimize layout issues and keep visitors from bouncing because something looks off.

         

        Key Highlights:

        • Testing on multiple browsers and versions
        • Attention to mobile device compatibility
        • Identifying minor code errors that affect display
        • Focus on consistent user experience
        • Includes both desktop and mobile environments

         

        Services:

        • Web design and development
        • eCommerce solutions
        • Content management systems
        • Local search engine optimization
        • Responsive website design
        • Dynamic website features

         

        Contacts:

        • Website: www.offthepegdesign.com
        • E-mail: hello@offthepegdesign.com
        • Facebook: www.facebook.com/OffThePegDesign
        • Twitter: x.com/offthepegdesign
        • LinkedIn: www.linkedin.com/company/off-the-peg-design-essex
        • Instagram: www.instagram.com/offthepegdesign
        • Phone: 01268 951 199
        12. BrowserStack

        12. BrowserStack

        BrowserStack focuses on ensuring that websites and web applications function consistently across a range of browsers and devices. They highlight the importance of testing beyond just the most popular browsers, pointing out that users may continue using older or less common browsers. By analyzing browser usage patterns and market share, they recommend testing on a mix of major and niche browsers, both on desktop and mobile, to account for real-world usage and avoid leaving any user segment behind.

        They also stress practical approaches to testing, such as creating a browser matrix, prioritizing real device testing over simulators, and using automation tools for broader coverage. This approach helps identify inconsistencies and interface issues that could otherwise go unnoticed. Testing on legacy versions alongside current browsers ensures that websites work smoothly for all users, reflecting a balanced method that considers both reach and feasibility.

         

        Key Highlights:

        • Testing on major and niche browsers based on market and audience
        • Real device testing for accurate user conditions
        • Automated testing to cover extensive browser-device combinations
        • Consideration of both desktop and mobile environments
        • Use of a browser matrix to streamline test coverage

         

        Services:

        • Cross-browser compatibility testing
        • Real device testing
        • Automated testing with Selenium and other frameworks
        • Test management and reporting
        • Accessibility testing
        • Website scanning for browser issues

         

        Contacts:

        • Website: www.browserstack.com
        • E-mail: support@browserstack.com
        • Facebook: www.facebook.com/pages/BrowserStack/305988982776051
        • Twitter: x.com/browserstack
        • LinkedIn: www.linkedin.com/company/browserstack
        • Instagram: www.instagram.com/browserstack
        • Phone: +1 (409) 230-0346
        13. Chromatic

        13. Chromatic

        Chromatic focuses on testing web applications across multiple browsers to ensure consistent functionality and appearance. They emphasize that browser incompatibilities often arise from differences in how browsers render HTML, CSS, and JavaScript. To address this, Chromatic combines functional and visual testing, allowing teams to catch issues across Chrome, Safari, Edge, and Firefox, while also accommodating regional and device-specific usage patterns. They highlight that selecting which browsers to test should consider user base, location, and platform to balance coverage with practical resources.

        Their approach also integrates automated testing into the development workflow, enabling continuous verification of browser compatibility through CI/CD pipelines. By running tests in parallel, they can quickly identify rendering issues without waiting for sequential checks. This includes visual testing through Storybook, as well as integration with tools like Playwright and Cypress, which helps streamline the process for teams of all sizes while keeping test coverage efficient and up to date.

         

        Key Highlights:

        • Functional and visual cross-browser testing
        • Support for Chrome, Safari, Edge, and Firefox
        • Parallel test execution for faster feedback
        • Integration with Storybook, Playwright, and Cypress
        • Consideration of user location and device type in testing

         

        Services:

        • Cross-browser visual testing
        • CI/CD integration for automated tests
        • Parallel browser testing
        • Storybook UI testing workflows
        • End-to-end visual tests
        • Browser compatibility monitoring

         

        Contacts:

        • Website: www.chromatic.com
        • Twitter: x.com/chromaticcom
        14. PowerMapper

        14. PowerMapper

        PowerMapper develops tools to check websites for browser compatibility issues across both desktop and mobile platforms. They focus on identifying features that may not work consistently in different browsers, such as HTML tags, CSS properties, JavaScript variations, and image formats. Their approach allows developers to spot potential issues early without the need for manual testing on multiple devices, helping ensure that websites display and function similarly across Chrome, Edge, Firefox, Safari, and mobile browsers on iOS and Android.

        Their tools scan websites automatically, providing detailed reports on compatibility problems, accessibility, SEO, and broken links. By highlighting where issues occur in the code and across pages, they give teams actionable insights for correcting inconsistencies. This systematic checking supports a smoother development process and helps maintain a reliable user experience across browsers and devices.

         

        Key Highlights:

        • Automated scanning for desktop and mobile browser compatibility
        • Checks HTML, CSS, JavaScript, and image format support
        • Early detection of potential compatibility issues
        • Reports include affected pages and code details
        • Integration of accessibility and SEO checks

         

        Services:

        • Browser compatibility testing
        • Automated website scanning
        • Accessibility checks
        • SEO analysis
        • Broken link detection
        • Detailed reporting for issue resolution

         

        Contacts:

        • Website: www.powermapper.com
        • E-mail: support@powermapper.com
        • Address: Level 5, 9 Haymarket Square, Edinburgh EH3 8RY, United Kingdom
        • Phone: 0845 056 8475
        15. Browserling

        15. Browserling

        Browserling makes cross-browser testing a lot less of a headache. Instead of juggling emulators or setting up multiple machines, developers can jump into real browsers running on virtual machines – basically as if the browsers were right on their own computer. It’s super handy for checking how a site looks and works across different platforms and screen sizes, especially the latest browser versions. They also make it easy to do responsive testing and grab screenshots for sharing or team discussions.

        On top of that, Browserling gives you tools like local testing through SSH tunnels, secure sandboxed browsing, and handy extensions or bookmarklets to speed things up. You can interact with browsers directly, share your results, and even automate some testing with their Live API. All in all, it’s about giving teams a practical way to spot and fix cross-browser issues before they turn into bigger headaches.

         

        Key Highlights:

        • Live interactive sessions with real browsers
        • Access to the latest browser versions across OS platforms
        • Responsive testing and screen resizing
        • Screenshot capture with annotation
        • Secure and sandboxed browsing environment
        • Local testing via SSH tunnels

         

        Services:

        • Online cross-browser testing
        • Live API for automation
        • Browser extensions and bookmarklets
        • Responsive design checks
        • Screenshot and bug reporting tools
        • Geo-browsing for testing in multiple regions

         

        Contacts:

        • Website: www.browserling.com
        • E-mail: hello@browserling.com
        • Twitter: x.com/browserling

        Conclusion

        Ensuring cross-browser compatibility is less about ticking a box and more about keeping your users’ experience consistent no matter how they access your site. Browsers interpret code in their own ways, and ignoring those differences can lead to frustrating bugs, broken layouts, or features that just don’t work. Taking the time to test across multiple browsers, devices, and screen sizes helps avoid those surprises and keeps your site reliable for everyone.

        It doesn’t have to be overwhelming either. Combining manual checks with automated tools, focusing on the browsers your audience actually uses, and building responsive, standards-compliant code makes the process more manageable. In the UK, where users rely on a mix of Chrome, Safari, Edge, and Firefox, paying attention to cross-browser practices ensures your site feels polished and accessible. At the end of the day, thoughtful testing isn’t just a technical step – it’s about making the web a little smoother for the people who visit it.

        AI Summary