902 agencies indexed·Latest entry: 16 October 2026
Web Development in London · 151 agencies

Web Development agencies in London.

Web Development is the technical build of a website or web application: writing code, configuring the CMS, wiring up integrations, and shipping a stable, performant product to production. It sits alongside web design, which is the visual and UX work, and is the discipline commissioned when the brief is to build, ship, and maintain. This page shows every agency on AgencyIndex offering web development in London.

At a glance
  • 151 UK agencies offering web development in London
  • Part of the Web Development service set
  • Indexed in London
  • Reviewed 18 May 2026
Showing 49-72 of 151 web development agencies in LondonAll Web Development agencies
Cirrus Design Studio logo
Cirrus Design Studio
Independent·London·2-10 Employees

Cirrus Design Studio Ltd, a premier digital design firm in Poole, Dorset, distinguishes itself with its unique offering of customised website design, personalised ERP solutions, and all-inclusive IT support. As a certified Google Partner and distinguished WIX Premier Partner, Cirrus ensures top-tier services for businesses across all scales. The agency takes immense pride in its exceptional custom

PRISM 55 logo
PRISM 55
Independent·London·2-10 Employees

PRISM⁵⁵ is a forward-thinking digital firm with its roots in Guildford and Exeter, UK. Renowned for its commitment to achieving tangible outcomes, PRISM⁵⁵ champions a cooperative, strategy-led approach that prioritises critical questioning to formulate efficient strategies swiftly. Combining cutting-edge design with advanced development and imaginative marketing, PRISM⁵⁵ crafts secure, robust, and

Chameleon logo
Chameleon
Independent·London·2-10 Employees

Chameleon is a UK and Ukraine-based digital agency, excelling in delivering powerful digital solutions for non-profits and charities. Our agency differentiates itself by harnessing intelligent technology to streamline processes, lower costs, and amplify service efficacy, thus extending swift help to a broader demographic. Solely devoted to generating social impact, Chameleon strategically employs

Thinking Human logo
Thinking Human
Independent·London·11-50 Employees

Specialising in the creation, design, and development of unique experiences, products, and services, Thinking Human partners with clients to shape world-class digital experiences. Our team stands out in the UK market for its commitment to transparency and collaborative work. With over a decade of extensive industry experience, we've had the privilege of working with several globally recognised bra

Archetype logo
Archetype
Independent·London·2-10 Employees

Archetype® is a leading creative agency situated in London, known for its comprehensive 360-degree creative solutions, with an emphasis on Arabic design and localisation. What distinguishes Archetype® is its acclaimed proficiency and the distinct fusion of in-house Arabic and Latin calligraphers and typographers who elevate the craft beyond standard expectations. This avant-garde methodology enabl

Cynosure Designs logo
Cynosure Designs
Independent·London·11-50 Employees

Cynosure Designs, a London-based digital marketing agency, specialises in enhancing brand visibility and driving ROI with additional branches in Dubai and Lahore. Renowned for our dynamic collaborations and digital marketing proficiency, we curate bespoke strategies that amplify your brand's presence. Our blend of creative ingenuity and data-led precision provides a holistic array of services, inc

Sonat Co. logo
Sonat Co.
Independent·London·2-10 Employees

Sonat Co., a London-based digital marketing agency, is renowned for its customised digital strategies and data-driven proficiency, purposefully crafted to amplify brands' online visibility and deliver extraordinary outcomes. Concentrating on digital media marketing, along with web design and development, Sonat Co. provides innovative solutions to uplift brands and propel businesses towards success

Tann Westlake logo
Tann Westlake
Independent·London·2-10 Employees

Tann Westlake specialises in transforming ambitious visions into tangible results for its clientele. Our expertise spans the rejuvenation of brands, enhancing website traffic and lead generation, surpassing advertising objectives, and invigorating video content. Nestled in the heart of West Sussex, Tann Westlake partners with both national and local businesses, driving forward inventive designs an

Subism logo
Subism
Independent·London·2-10 Employees

Subism is recognised as a pioneering digital design and development studio, steadfast in driving impactful transformations for our clients and the wider global community. Our specialisation lies in fostering innovation, partnering with those who are reshaping their respective sectors. These industry trailblazers depend on our professional guidance to navigate their path forward. Our strength is ro

Tactic Marketing logo
Tactic Marketing
Independent·London·11-50 Employees

Tactic Marketing, your premier destination for superior branding and marketing solutions, houses a team of creative experts devoted to crafting unique strategies. As your go-to marketing resource, we at Tactic Marketing use focused and strategic methodologies to connect with the audience you seek to transform into loyal customers. Harnessing the power of first-rate marketing techniques, we guarant

Forward Digital logo
Forward Digital
Independent·London·2-10 Employees

Forward Digital, a distinguished software development agency in the UK, excels in crafting personalised websites and mobile applications. They equip inventive businesses with customised software solutions, specifically designed to overcome individual obstacles and promote expansion. Their unique selling point is their cooperative methodology, which includes clients in every step of the development

Fat Fish Marketing logo
Fat Fish Marketing
Independent·London·2-10 Employees

Fat Fish Marketing, a Northern Ireland-based digital marketing agency, thrives on its data-driven approach. Renowned for its dedication to not only enhancing organic traffic but also boosting client sales, this brand shines in its speciality services such as search engine optimisation and the creation of SEO-friendly websites. Named among the Top 10 SEO Companies in the UK, Fat Fish Marketing stan

Kinsman & Co logo
Kinsman & Co
Independent·London·2-10 Employees

Kinsman & Co, a London-based all-inclusive marketing agency, is renowned for its extensive range of digital marketing solutions. With specialisation in pioneering video production, strategic social media planning, and effective PPC campaigns, they are the go-to agency for an integrated approach to bolstering your marketing visibility and delivering measurable outcomes. Their proficiency in devisin

Fifty Five and Five logo
Fifty Five and Five
Independent·London·11-50 Employees

Five Fifty Five is an innovative marketing firm nestled in the heart of London, UK. As a unique blend of human ingenuity and advanced AI, this agency offers bespoke marketing solutions and expert advisory services specifically designed for B2B organisations. Their distinctive methodology equips marketing departments with state-of-the-art tools and customised AI-led strategies that excel beyond the

Studiomade logo
Studiomade
Independent·London·2-10 Employees

Studiomade, a London-based strategic design and digital agency, excels in assisting businesses to thrive and launch innovative ventures through their expertise in branding, technology, and digital solutions. The agency's distinct mission sets it apart, demonstrating its ability to pivot and excel in a variety of industries. With a unique approach towards developing trailblazing projects such as us

Hi Mum! Said Dad logo
Hi Mum! Said Dad
Independent·London·11-50 Employees

Hi Mum! Said Dad, a UK-based design and build agency, is highly esteemed for its proficiency in innovation strategy, user-focused design, and product development. This reputable agency specialises in transmuting concepts into tangible results via comprehensive customer research, swift prototyping, and avant-garde engineering. With a proven track record of catering to globally recognised clients, H

nerds agency logo
nerds agency
Independent·London·2-10 Employees

Nerds Agency, a celebrated digital agency situated in London, UK, boasts a wide array of services such as website creation, social media handling, digital marketing strategies, brand crafting, and graphic design solutions. Their dedication to ongoing learning and development sets them apart, keeping them ahead of the curve in industry trends, and ensuring they deliver outstanding results for their

Futurice logo
Futurice
Network·London·501-1000 Employees

Futurice, a leading digital transformation agency, hails from Finland. The agency distinguishes itself with an exceptional interdisciplinary methodology, merging top-tier technologists, strategists, and designers. They specialise in offering ground-breaking, quantifiable digital solutions spanning various sectors. Renowned for its swift outcomes and enduring influence, Futurice works in concert wi

AndAgain logo
AndAgain
Independent·London·2-10 Employees

AndAgain, a pioneering digital agency headquartered in London, perfectly blends strategic thinking, inventive creativity, and technological prowess. Our prime expertise lies in creating digital products and campaigns for the luxury, fashion, retail, entertainment, and B2B industries. Our unique approach enables us to serve clients across both the UK and USA. We are renowned for our innovation and

Effra Digital logo
Effra Digital
Independent·London·2-10 Employees

Effra, a London-based web design and build agency, specialises in crafting highly functional, CMS-integrated, and mobile-optimised websites customised for start-ups, charities, and SMEs. With over three decades of industry experience, Effra sets itself apart with its transparent, agile methodology and dedication to user-centric design. This ensures not only efficient but also future-ready digital

Sixtwo Agency logo
Sixtwo Agency
Independent·London·2-10 Employees

Sixtwo, a London-based website design agency, distinguishes itself through its dedication to crafting unique, compelling websites that instigate dialogue and nurture relationships. The emphasis they place on client-centric experiences promises an enjoyable and immersive design journey. Their comprehensive, customised solutions extend from digital consulting and UX strategy to tailor-made website a

Brand42 logo
Brand42
Independent·London·2-10 Employees

Brand42, a London-based independent design and digital agency, distinguishes itself through its award-winning methodology in providing strategic branding solutions. Specialising in engaging and globally adaptable digital design, Brand42 is renowned for its unique approach. The innovative one-team strategy employed by the agency successfully bypasses bureaucratic hurdles, thus guaranteeing an exped

Odiono logo
Odiono
Independent·London·2-10 Employees

Based in London, Odiono is a distinguished digital marketing agency renowned for its proficiency in website development, SEO, PPC, and social media marketing. In a strategic move, Odiono has teamed up with TMH Media, thus forming TMH Digital - a robust entity offering a potent mix of digital and offline media services. This alliance offers a unified approach to marketing, optimising the robust cap

Square Balloon logo
Square Balloon
Independent·London·2-10 Employees

Square Balloon, strategically located in London, UK, is a distinguished agency specialising in branding, marketing, and digital solutions. The unique factor that differentiates Square Balloon is their holistic approach to business enhancement, which involves offering bespoke design, technology, and marketing services, seamlessly integrated to boost business expansion and productivity. The agency i

Editor's note

AgencyIndex tracks 151 web development agencies in London. The list above is filtered to that intersection and ordered with verified and featured listings first.

For the wider editor's view on web development agencies in the UK, see the web development service brief. For context on London's marketing cluster, see the London location brief. The pricing, timeline and red-flag notes below apply to web development as a discipline; they do not change materially in London.

Typical cost
£2,000-150,000+
per project

Brochure / small WordPress £2,000-15,000 · Custom React or Next.js £10,000-50,000 · Mid-size ecommerce £8,000-50,000 · Complex web apps and SaaS £50,000-150,000+. Maintenance retainers £150-2,000+ per month.

Realistic timeline
4 weeks-9 months
per launch

Brochure sites 4-8 weeks · Ecommerce 8-16 weeks · Complex web apps 4-9 months. Phases: discovery 1-4wks, design 1-6wks, build 1-20wks, QA 1-4wks, launch.

Red flags
6 to watch
in any pitch
  • · Refusal to hand over source code ownership or repo access on handover
  • · Proprietary CMS or hosting lock-in that makes migration off the platform painful
  • · Hidden offshoring with no named technical lead and no time-zone overlap
  • · No SLA on bug fixes, no documented post-launch support terms
  • · Can't talk fluently about Core Web Vitals, Lighthouse, or WCAG 2.1 AA accessibility
  • · Suspiciously low fixed-price quotes that skip discovery and assume zero scope creep
Frequently asked

What brands ask about web development agencies.

The 5 questions our editors get most often, answered honestly. These apply to web development as a discipline regardless of city.

Curated by humans

UK web development pricing splits by project type. A brochure or small WordPress site from a proper agency runs £2,000-15,000. Custom React or Next.js builds, usually paired with a headless CMS, sit at £10,000-50,000. Mid-size ecommerce lands between £8,000 and £50,000 depending on integrations. Complex web apps and SaaS platforms start around £50,000 and climb past £150,000 for enterprise work. Maintenance retainers are separate and typically run £150-2,000+ per month.