Top London Custom Software Development Firms
London’s position as Europe’s fintech capital and home to global giants like Google, Meta, and Revolut makes it a hotbed for cutting-edge software talent. Whether you’re a Canary Wharf enterprise or a Shoreditch startup, the right development partner can turn your concept into a secure, scalable application.
Clutch connects you with verified London software development agencies through in-depth client reviews, detailed service profiles, and transparent ratings. Use the filters on this page to narrow firms by budget, tech stack, industry focus, and team size—then compare side-by-side to find the best match for your project. Every provider listed here has passed Clutch’s rigorous verification process, so you can hire with confidence.
Looking to compare a broader pool of experts? Explore the global list of Top Software Development Companies
Considering nearby talent hubs? Check out agencies in Manchester and Bristol
Need industry-specific partners? View our filter for London Healthcare Software Developers
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Featured
What are Featured Providers?
$10,000+$50 - $99 / hr50 - 249London, EnglandServices provided
See all 20 projectsOld.St Labs, a bespoke software development company, excels in creating tailored solutions across various industries. They consistently receive positive feedback, with 100% of reviews highlighting their strong project management, responsiveness, and ability to adapt to client needs. Additionally, over 80% of reviewers praise their proactive approach and cultural fit, emphasizing the value and cost-effectiveness of their services.
$25,000+$25 - $49 / hr1,000 - 9,999Serves London, EnglandServices provided
See all 82 projectsSimform is a custom software development company specializing in tailored software solutions across various industries, including SaaS, healthcare, and financial services. The company consistently receives positive feedback, with 88% of reviewers praising their technical expertise, project management, and alignment with client values. Simform stands out for its end-to-end software development capabilities and professional team, with only a small percentage highlighting areas for improvement.
$25,000+$25 - $49 / hr50 - 249Serves London, EnglandServices provided
See all 29 projectsDBB Software is a bespoke software development company specializing in tailored software development and full stack software development services. Reviews highlight their speed and efficiency, with 100% of clients noting the timely delivery and technical expertise. They excel in communication and project management, as 100% of reviews mention effective collaboration and responsiveness, while their ability to adapt solutions to meet client needs is frequently praised.
$25,000+$25 - $49 / hr50 - 249Serves London, EnglandServices provided
See all 53 projectsLeobit is a Custom Software Development company known for its strong expertise in modern architecture and end-to-end software development. Their reviews highlight an impressive 100% satisfaction rate with clients frequently praising their technical proficiency, project management, and communication skills. Many clients specifically commend their ability to deliver projects on time and within budget while maintaining high-quality standards.
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$10,000+$100 - $149 / hr10 - 49London, England
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Established in 2019, Technology Transformation Group is a web design company. Headquartered in London, England, the team specializes in Web Design and cloud consulting & SI.
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$50,000+$300+ / hr50 - 249London, England
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Core Technology Systems Ltd is an IT managed services company. They provide IT managed services and IT strategy consulting and were established in 1990. The firm is headquartered in London, England.
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Featured
What are Featured Providers?
$10,000+$25 - $49 / hr50 - 249Serves London, EnglandServices provided
See all 3 projectsAttrecto Next Tech Digital Solutions is a versatile software development company specializing in mobile app and web platform development. They consistently deliver high-quality results, as evidenced by positive client feedback highlighting their strong project management, flexibility, and innovative approach. Notably, they maintain a 100% satisfaction rate among clients, with numerous mentions of their adaptability and comprehensive project execution.
$25,000+$50 - $99 / hr1,000 - 9,999London, EnglandServices provided
See all 98 projectsVention is a bespoke software development company specializing in custom software creation and full-stack software development. Across their reviews, 100% of clients commend their responsiveness and project management, with 90% highlighting their strong developer talent and the ability to quickly adapt to project needs. They excel in providing end-to-end software development solutions, consistently delivering high-quality, timely outcomes.
$10,000+< $25 / hr250 - 999Serves London, EnglandServices provided
See all 42 projectsDreamzTech Solutions is a custom software development company specializing in tailored and bespoke software creation. Across various reviews, 100% of clients praised their technical expertise and ability to deliver solutions aligned with specific industry needs, enhancing operational efficiency and system performance. Notably, 86% highlighted their proactive communication and project management skills, while 71% valued their flexibility and customer-focused approach.
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$1,000+$50 - $99 / hr50 - 249London, England
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Based in London, England, Logo Designs Company is a midsize Logo company. Their services include Logo and Mobile & App Marketing.
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$10,000+$25 - $49 / hr10 - 49London, England
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Established in 2015, Muljin is a software development firm. The small team offers Custom Software Development and Mobile App Development.
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$5,000+$100 - $149 / hr10 - 49London, England
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Welovedevwork is an IT staff augmentation company. The London, England-based agency specializes in IT staff augmentation and Custom Software Development.
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$5,000+Undisclosed10 - 49London, England
Services provided
Kly Agency is an AI Agents company launched in 2022. Their services include AI Agents and Custom Software Development.
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$1,000+$25 - $49 / hr10 - 49London, England
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Established in 2023, Scaler Digital LLP is an UX agency. The small team offers UX/UI Design and Custom Software Development.
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Featured
What are Featured Providers?
$10,000+$25 - $49 / hr10 - 49Serves London, EnglandServices provided
See all 37 projectsTallium Inc. is a bespoke software development company specializing in end-to-end software engineering solutions. Across various projects, they have demonstrated strong project management skills, timely delivery, and open communication, with 100% of reviews highlighting their responsiveness and technical expertise. Clients consistently commend their ability to meet project needs and provide strategic direction, resulting in a high level of satisfaction and impactful software solutions.
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$5,000+$25 - $49 / hr50 - 249London, England
Services provided
Estech Digital is a software development firm founded in 2015. Based in Los Angeles, California and London, England, the team provides Custom Software Development and Web Development.
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$1,000+$50 - $99 / hr50 - 249London, England
Services provided
SEO company Olio Solution is in London, England and London, England. They specialize in Search Engine Optimization and Web Design and were founded in 2017.
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$25,000+$25 - $49 / hr50 - 249London, England
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Launched in 2011, Think Digitally is a midsize London, England-based custom software development company. Their services include Custom Software Development and Web Development.
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$50,000+$200 - $300 / hr10 - 49London, England
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Founded in 2004, Applied Works is a small web development firm in London, England. Their team specializes in Web Development and Digital Strategy.
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$10,000+$150 - $199 / hr2 - 9London, England
Services provided
Web development firm CocoonFMS Ltd was established in 2021. The small team provides Web Development and Logistics & Supply Chain Consulting.
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$10,000+$50 - $99 / hr50 - 249Los Angeles, CA
Services provided
See all 9 projectsBN Digital is a bespoke software development company specializing in custom software creation and full-stack software development. Their reviews highlight a strong client focus, creativity, and responsiveness, with 100% of reviewers praising their collaborative approach. However, there is room for improvement in back-end engineering for less standard technologies.
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UndisclosedUndisclosed10 - 49London, England
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Small custom software development firm and Contract Manufacturing company AMFG, is in London, England. Their services include Custom Software Development and Contract Manufacturing.
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UndisclosedUndisclosed10 - 49London, England
Services provided
S3M Security is a London, England-based Cybersecurity and software development firm. They provide Cybersecurity and Custom Software Development and were founded in 2016.
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UndisclosedUndisclosed250 - 999London, England
Services provided
VBT Software, a software development company, was launched in 1993. The firm focuses on Custom Software Development and IT strategy consulting.
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$10,000+$25 - $49 / hr50 - 249London, England
Services provided
Vrinsoft UK is a SEO services firm. The London, England-based company was launched in 2012. Their services include Search Engine Optimization and IT managed services.
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$100,000+$150 - $199 / hr50 - 249London, England
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Caystard Group Intl is an IT strategy consulting company. They are in New York, New York and Kampala, Uganda. Their team offers IT strategy consulting and cloud consulting & SI.
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$10,000+$25 - $49 / hr50 - 249London, England
Services provided
Web design company CedrTech is based in L'viv, Ukraine and London, England. They focus on Web Design and UX/UI Design and were launched in 2022.
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$5,000+$200 - $300 / hr2 - 9London, England
Services provided
Based in London, England, Tudor Software House is an IT strategy consulting company. The team focuses on IT strategy consulting and Custom Software Development.
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UndisclosedUndisclosed50 - 249Romford, England
Services provided
Codezee Solutions is a web design company. The team focuses on Web Design and Mobile App Development and is located in Romford, England.
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$5,000+$25 - $49 / hr10 - 49London, England
Services provided
Founded in 2020, ZEPS Tech is a small London, England-based Product Design company. Their services include Product Design and Custom Software Development.
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$10,000+$100 - $149 / hr10 - 49London, England
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XR Digital is a custom software development firm established in 2018. The team offers Custom Software Development and AR/VR development and is headquartered in London, England and Islamabad,
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$1,000+$50 - $99 / hr10 - 49Harrow, England
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Digikestra, a Digital Strategy company, is headquartered in Harrow, England. They specialize in Digital Strategy and UX/UI Design.
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$1,000+$50 - $99 / hr10 - 49London, England
Services provided
Delphi Technologies is a Digital Strategy company in London, England. The team specializes in Digital Strategy and Product Design.
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$1,000+$25 - $49 / hr10 - 49london, England
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Small business intelligence company Nextbiz, is located in london, England. The team provides BI & big data consulting & SI and Custom Software Development.
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$5,000+$50 - $99 / hr10 - 49London, England
Services provided
CorestreamNG is a London, England-based web design company. They focus on Web Design and IT strategy consulting.
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$10,000+$100 - $149 / hr10 - 49London, England
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Eastside Co is an e-commerce development firm. Located in London, England, the team offers E-Commerce Development and Web Design.
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UndisclosedUndisclosed2 - 9London, England
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Small big data company Hyphen Technology, is in London, England. Their services include BI & big data consulting & SI and Conversion Optimization.
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$1,000+$25 - $49 / hr50 - 249London, England
Services provided
Tug Agency is a branding company. In London, England and Toronto, Canada, their team provides Branding and Digital Strategy.
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$10,000+Undisclosed10 - 49Chobham, England
Services provided
See all 3 projectsBlue Tea is a bespoke software development company specializing in end-to-end software engineering solutions. Their reviews highlight a strong focus on tailored software development, with 100% of clients praising their technical expertise and on-time delivery. Clients appreciate their excellent communication, ethical values, and ability to transform complex requirements into functional software solutions.
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$1,000+Undisclosed50 - 249London, England
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Kogito IT Services Pvt Ltd is a web design company. Located in Kolkata, India and London, England, their team provides Web Design and Web Development.
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UndisclosedUndisclosed250 - 999Wood Hill, England
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Blueflame Labs is a cloud consulting & SI company in Pune, India and Wood Hill, England. They offer cloud consulting & SI and CRM consulting and SI and were established in 2017.
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$5,000+< $25 / hr2 - 9London, England
Services provided
Headquartered in London, England, Techsleight is a small custom software development company. The team offers Custom Software Development and Web Development.
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$25,000+$150 - $199 / hr50 - 249London, England
Services provided
Headquartered in Manchester, England and London, England, AMI3GO Ltd is a cloud consulting & SI company. They offer cloud consulting & SI and Custom Software Development.
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$5,000+$25 - $49 / hr250 - 999Toronto, Canada
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See all 6 projectsFolio3 is a versatile software development company specializing in custom software creation, with particular expertise in HTML5 migration and Shopify and NetSuite integrations. Reviews highlight their ability to deliver projects on time and budget, with 100% of reviewers noting their effective project management and communication skills. Customers appreciate their cost-effectiveness and seamless execution of tailored software development solutions.
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$10,000+$150 - $199 / hr10 - 49London, England
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E-commerce development firm We Make Websites is based in London, England. They focus on E-Commerce Development and Web Development.
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$25,000+Undisclosed10 - 49London, England
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Answering service FX Digital was launched in 2011. The firm focuses on Call Center Services and Web Design, and is small.
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$5,000+$25 - $49 / hr2 - 9London, England
Services provided
HybridTechLabs - Custom Apps Development - Software Developers Poland, a software development firm, was established in 2017. The firm offers Custom Software Development and Mobile App Development.
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$5,000+$50 - $99 / hr2 - 9Edgware, England
Services provided
Sniro is a small Edgware, England-based e-commerce development firm. Their services include E-Commerce Development and Custom Software Development.
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$5,000+$100 - $149 / hr2 - 9London, England
Services provided
ATES IT SOLUTIONS LTD. Is a custom software development company. The London, England-based team specializes in Custom Software Development and Artificial Intelligence.
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$25,000+$100 - $149 / hr2 - 9London, England
Services provided
Thisdotsoftware is a software development company. Their team is located in London, England. The agency focuses on Custom Software Development and Application Testing.
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$5,000+$100 - $149 / hr2 - 9Romford, England
Services provided
Headquartered in Romford, England, GGDX Ltd is a small website development company. The team offers Web Development and Application Testing.
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UndisclosedUndisclosed2 - 9London, England
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BetterX Worldwide is a branding company established in 2020. The company provides Branding and Social Media Marketing.
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$5,000+$25 - $49 / hr2 - 9London, England
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SoftSyncDev is an UX design agency. The Karachi, Pakistan-based team focuses on UX/UI Design and Custom Software Development.
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$1,000+$100 - $149 / hr2 - 9London, England
Services provided
Andbetween® is a branding agency founded in 2017. Based in London, England, the team focuses on Branding and Web Design.
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$5,000+< $25 / hr2 - 9Ilford, England
Services provided
Asoftica Limited is a SEO company. Their small team is headquartered in Ilford, England and provides Search Engine Optimization and Custom Software Development. The agency was founded in 2013.
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$25,000+$100 - $149 / hr2 - 9London, England
Services provided
Digital Bank Expert is an IT staff augmentation company. Launched in 2016, their team offers IT staff augmentation and IT strategy consulting.
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$10,000+$200 - $300 / hr10 - 49London, England
Services provided
Wisdom Works, an AI development company, was founded in 2020. The team provides Artificial Intelligence and IT strategy consulting.
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$10,000+$50 - $99 / hr50 - 249London, England
Services provided
Headquartered in London, England, Crypto Developers is a Blockchain company. They offer Blockchain and Web Design and were launched in 2022.
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List of London's Top 15 Software Companies | Top 15 London Software Developers
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$50,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
40% Custom Software Development60% Other -
$25,000+$50 - $99 / hr1,000 - 9,999Woodbridge Township, NJ
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
30% Custom Software Development70% Other -
$25,000+$50 - $99 / hr250 - 999London, England
Ability to deliver
39.5/40.019.6/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
45% Custom Software Development55% Other -
$10,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
25% Custom Software Development75% Other -
$50,000+$50 - $99 / hr1,000 - 9,999London, England
Ability to deliver
39.3/40.020/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
20% Custom Software Development80% Other -
$10,000+$50 - $99 / hr50 - 249Toronto, Canada
Ability to deliver
39.1/40.019.6/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
45% Custom Software Development55% Other -
$10,000+$50 - $99 / hr250 - 999Novi Sad, Serbia
Ability to deliver
39/40.019.4/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
60% Custom Software Development40% Other -
$50,000+$150 - $199 / hr250 - 999Ljubljana, Slovenia
Ability to deliver
39/40.019/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
25% Custom Software Development75% Other -
$1,000+< $25 / hr50 - 249Hertfordshire, England
Ability to deliver
39.2/40.020/20 Reviews9.9/10 Clients & Experience9.3/10 Market PresenceService focus
35% Custom Software Development65% Other -
$25,000+$50 - $99 / hr50 - 249London, England
Ability to deliver
38.1/40.018.2/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
50% Custom Software Development50% Other -
$50,000+$25 - $49 / hr1,000 - 9,999London, England
Ability to deliver
37.6/40.017.8/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
30% Custom Software Development70% Other -
$25,000+< $25 / hr1,000 - 9,999London, England
Ability to deliver
37.3/40.017.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
50% Custom Software Development50% Other -
$25,000+$25 - $49 / hr50 - 249London, England
Ability to deliver
37.3/40.017.6/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
40% Custom Software Development60% Other -
$50,000+$25 - $49 / hr1,000 - 9,999London, England
Ability to deliver
37.2/40.017.4/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
45% Custom Software Development55% Other -
$1,000+$25 - $49 / hr1,000 - 9,999London, England
Ability to deliver
38.8/40.019.4/20 Reviews9.6/10 Clients & Experience9.8/10 Market PresenceService focus
15% Custom Software Development85% Other -
$50,000+$50 - $99 / hr250 - 999London, England
Ability to deliver
36.6/40.016.6/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Custom Software Development50% Other -
$25,000+$25 - $49 / hr50 - 249London, England
Ability to deliver
36.5/40.017.6/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
40% Custom Software Development60% Other -
$25,000+$50 - $99 / hr1,000 - 9,999London, England
Ability to deliver
36.2/40.016.2/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Custom Software Development50% Other -
$10,000+$100 - $149 / hr10 - 49London, England
Ability to deliver
37.3/40.017.8/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
40% Custom Software Development60% Other -
$50,000+$25 - $49 / hr250 - 999London , England
Ability to deliver
36.3/40.016.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
25% Custom Software Development75% Other -
$10,000+$100 - $149 / hr250 - 999London, England
Ability to deliver
37.8/40.018.6/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
20% Custom Software Development80% Other -
$10,000+$25 - $49 / hr50 - 249London, England
Ability to deliver
35.8/40.016.6/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
40% Custom Software Development60% Other -
$10,000+$50 - $99 / hr50 - 249London, England
Ability to deliver
37.7/40.018.8/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
30% Custom Software Development70% Other -
$25,000+$25 - $49 / hr1,000 - 9,999London, England
Ability to deliver
35.6/40.015.8/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
20% Custom Software Development80% Other -
$75,000+$50 - $99 / hr1,000 - 9,999London, England
Ability to deliver
35.5/40.016.4/20 Reviews9.8/10 Clients & Experience9.2/10 Market PresenceService focus
40% Custom Software Development60% Other -
$10,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
37.4/40.017.8/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
20% Custom Software Development80% Other -
$25,000+$25 - $49 / hr50 - 249London, England
Ability to deliver
37.4/40.017.6/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
30% Custom Software Development70% Other -
$50,000+$150 - $199 / hr250 - 999London, England
Ability to deliver
35.3/40.015.6/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
30% Custom Software Development70% Other -
$10,000+$25 - $49 / hr250 - 999London, England
Ability to deliver
35.7/40.016.2/20 Reviews9.7/10 Clients & Experience9.8/10 Market PresenceService focus
25% Custom Software Development75% Other -
$100,000+$50 - $99 / hr1,000 - 9,999Wrocław, Poland
Ability to deliver
36.7/40.016.8/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
16% Custom Software Development84% Other
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London Software Developer FAQs
Working with a local team offers unique, strategic advantages that a remote partner may not be able to provide, including:
- Time-zone alignment with the rest of Europe for real-time collaboration.
- Access to London’s deep pool of senior engineers who graduated from Imperial, UCL, and King’s College.
- Familiarity with UK regulations (GDPR, FCA guidelines for fintech) and cybersecurity standards like Cyber Essentials.
- Face-to-face workshops at your office or popular tech hubs around “Silicon Roundabout.”
Rates for hiring a London-based software development firm vary based on several factors, including complexity, team seniority, and technical requirements. To give you a better understanding, here’s a breakdown of costs based on Clutch data:
- Hourly: £75 – £150 for most mid-sized agencies, while boutique specialists may charge up to £200.
- Fixed-price MVP: £30,000 – £80,000 for a 3 – 6 month build.
- Enterprise platforms: £150,000+ for multi-year, multi-team engagements.
London rates are higher than many UK regions, but proximity, talent density, and strategic guidance often justify the premium costs.
Thanks to London’s diverse economy, experienced software development agencies regularly build solutions for clients from various industries and niches, such as:
- Fintech and insuretech
- E-commerce and retail tech
- Healthtech and med-device integrations
- Media, gaming, and streaming platforms
- Proptech and smart-city applications
Many teams also offer sector-specific compliance expertise, such as ISO-13485 for healthcare or PCI DSS for payments.
Start by defining success metrics—launch date, KPIs, budget cap—and shortlist agencies with matching case studies. After that, review Clutch client feedback for proof of the following:
- Transparent, agile workflows (e.g., weekly sprints, demo days)
- Strong communication skills and cultural fit
- Clear IP ownership terms and NDA policies
- Relevant tech-stack certifications (AWS Partner, Microsoft Gold, etc.)
Arrange technical interviews with lead developers, not just sales reps, before signing an agreement.
- Vague estimates or refusal to detail sprint deliverables
- No local references despite claiming London headquarters
- Overreliance on junior offshore teams without senior oversight
- Lack of cybersecurity or GDPR compliance processes
- “One-size-fits-all” proposals that ignore your business goals
A credible agency will proactively address these areas and tailor their approach to your needs. It’s better to be meticulous when selecting prospective partners than to be contracted with an unfit team.