Table of contents
How we vet every listicle
Every agency featured on Web Tonic passes our 84-point editorial review before a single listicle goes live. This is how we vet each pick:
Verified client outcomes: We require real case studies with measurable KPIs — revenue, ROAS, CPA, retention — tied to the exact category being ranked. No cherry-picked wins, no unverifiable numbers.
Independent reputation: We cross-check Clutch, Google, G2, and Trustpilot ratings, and screen for review-bombing or suspicious patterns. Only operators with a consistent, verifiable track record make the cut.
Beyond that, every listing goes through a quarterly re-audit. We check 84 criteria across 6 pillars to make sure it still holds up — here are some of the checks we run:
A Shopify and ecommerce development agency builds the store itself and then keeps it trading: the theme or headless front end, the app, payment and ERP integrations, migration off WooCommerce, Magento or PrestaShop, product data and checkout work, the speed and conversion fixes that follow launch, and the maintenance retainer that owns the store once real orders are running through it.
Seventeen external firms serving London cleared that check, judged on what their own sites publish about building and running stores rather than on one ecommerce line in a services menu. Twelve name Shopify by name, six name a client, and the shortlist stops where the evidence stops.
What does a London Shopify development agency actually build?
A built or migrated store, the payment, ERP and marketing integrations behind it, and someone accountable for speed and checkout after launch. Seventeen external firms cleared our evidence check, thirteen publish a London base, six name a client you can check, and none publishes a rate.
1. Web Tonic
About: Web Tonic builds stores inside one development programme, so the build, the demand that lands on it and the reporting are planned together rather than handed between suppliers. London briefs usually arrive as a replatform with live orders to protect, so we settle migration scope, redirects and who owns the code before we quote. A brand that only wants a theme installed cheaply will be better served by several of the firms below.
Key Services: Growth Marketing, Paid Social, PPC, Meta Ads, SEO, Google Ads, Snapchat Ads, Amazon Ads, Reddit Ads, TikTok Ads, TikTok Shop, GEO-AEO, Webflow Design, Shopify Design, WordPress Design, UGC, Social Media Management, Pay Per Click Management, Marketing Analytics, Analytics Implementation & CDPs, Performance Branding, Performance 360° Audit, Programmatic Ads, OOH Ads, HR Marketing
Industries Served: eCommerce, SaaS, B2B, Construction Professionals, Home Services, SMEs, Health Spa & Wellness, Retail, Legal & Judicial Services, Food & Beverages, Pets, Fitness, Family & Children, Finance & Insurance, Travel, Non-Profits & Organizations, Furniture & Decoration
Notable Clients: WorldRemit, Jack & Jones, Ardene, L’Oréal, Sendwave, Nestlé, Airbnb. Serve Fortune 500 companies and smaller fast-paced startups.
Locations: HQ in San Francisco with notable offices in New York, Chicago, Miami, Toronto, Montreal, Dubai, Singapore, Sydney and more. Offices on five continents.
Pricing: Starting at USD $3,000 per month. Flexible and scalable plans at any time according to your enterprise needs. Book a call to learn more.
Great For: Mid-market to enterprise-level businesses requiring ongoing, on-tap growth and performance marketing services.
Website: Web Tonic
2. Charle Agency
About: Charle is an award-winning Shopify Plus accredited agency based in London that specializes in search-first ecommerce design, development, and migration solutions. They partner with ambitious brands globally to build high-performance Shopify stores supported by ongoing behavioral experimentation, SEO, and retention marketing.
Key Services: Shopify Web Design, Shopify Plus, Shopify Migrations, App Development, Integrations, Shopify SEO, Ecommerce SEO, Email Marketing, CRO Agency, Support & Maintenance
Industries Served: Clothing and fashion, Food and drink, Health and beauty, Home and garden
Notable Clients: Cambridge Satchel, Candy Kittens, Billionaire Boys Club, 111SKIN, Muc-Off, Case Furniture
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Charle Agency
3. Avex E-commerce Agency
About: Avex is a full-service Shopify Plus e-commerce agency specializing in custom website design, development, and digital optimization for mid-market and enterprise brands. Based in New York City, the firm focuses on accelerating growth through data-backed UX design and technical integrations.
Key Services: Shopify Plus Development, Ecommerce Web Design, Headless Commerce, Conversion Rate Optimization, Email Marketing
Industries Served: Fashion, Beauty, Luxury, Lifestyle
Notable Clients: Hugo Boss, LVMH, Mondelez, Kith
Locations: New York, USA
Pricing: Quote-based
Great For: Not publicly stated
Website: Avex E-commerce Agency
4. Eastside Co
About: Eastside Co is a prominent Shopify Platinum Partner agency established in 2012, specializing in custom e-commerce web design, development, and marketing. They operate with an in-house team of specialists delivering tailored solutions ranging from platform migrations to custom app development.
Key Services: Shopify Web Design, Shopify Web Development, Shopify Marketing, Ongoing Shopify Support, Shopify App Development
Industries Served: Ecommerce, Retail, Consumer Goods
Notable Clients: Carex, Absolute Collagen
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Eastside Co
5. Medito Digital
About: Medito Digital is a specialist Shopify expert agency headquartered in London that has delivered over 320 projects since 2015. The team focuses entirely on the Shopify ecosystem, offering bespoke theme design, store optimization, migrations, and custom app integrations.
Key Services: Shopify Store Development, Bespoke Theme Design, Shopify Plus Builds, Platform Migrations, Custom App & System Integrations, Store Optimisation & SEO
Industries Served: Ecommerce, Retail & Fashion, Direct-to-Consumer (D2C)
Notable Clients: Dior
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Medito Digital
6. Shero Commerce
About: Shero Commerce is a Shopify Premier agency that helps eCommerce brands grow sales and lower costs through design, development, and digital marketing. They provide first-class, personalized expertise for complex replatforming, B2B, DTC, SEO, and retention marketing projects.
Key Services: Shopify Development, eCommerce Replatforming, System Integration, Performance Marketing, AI Enablement
Industries Served: B2B, B2C, DTC, Fashion, Lifestyle
Notable Clients: No client publicly named on the firm's own site
Locations: Red Hook
Pricing: Quote-based
Great For: Not publicly stated
Website: Shero Commerce
7. Sniro Ltd
About: Sniro is a full-service web development and digital marketing agency based in London that provides custom web and e-commerce solutions, including Shopify development, WordPress, Laravel, SEO, and AI automation. They serve global clients with a multidisciplinary team focusing on digital transformation, robust web development, and measurable growth.
Key Services: Web Development, E-commerce Development, Shopify Development, WordPress Development, Laravel Development, SEO, Digital Marketing, AI Automation
Industries Served: Ecommerce, SaaS, Automotive, B2B Services
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Sniro Ltd
8. EXENLABS Shopify Agency
About: Exen Labs is a fully in-house Shopify agency based in London that has partnered with brands since 2014 to design, build, and grow stores. They provide transparent, senior-led delivery ranging from store setup and custom Shopify development to ongoing CRO, SEO, and digital marketing growth programmes.
Key Services: Shopify Store Setup, Custom Feature Development, Site Speed Optimisation, Search Engine Optimisation (SEO), Content Writing, Visual Content and Branding, Marketing & Sales, Strategic Consulting
Industries Served: Ecommerce, Skincare, Security & Surveillance, Higher Education
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: EXENLABS Shopify Agency
9. Genie Crawl
About: Genie Crawl is a digital marketing and development agency offering ecommerce website development alongside targeted platform SEO services for systems like Shopify. They provide flexible month-to-month digital optimization and web solutions tailored to business growth.
Key Services: Ecommerce Development, Shopify SEO, Web Design and Development, PPC, Digital Marketing
Industries Served: Not publicly stated
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Genie Crawl
10. Nautilus Marketing
About: Nautilus Marketing is a full-service digital marketing and web development agency based in London. They combine creative web design and development with organic search, paid media, and social strategies to help brands grow online.
Key Services: Web Design, Web Development, WordPress, SEO, Paid Ads, Social Media
Industries Served: Not publicly stated
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Nautilus Marketing
11. Reload Digital (s360 UK)
About: Reload Digital (now s360 UK) is an agile digital marketing and ecommerce agency based in London that helps retail and D2C brands scale. Their team of consultants specializes in driving omnichannel growth through strategic performance marketing, technical SEO across major platforms, and lifecycle marketing.
Key Services: Digital Marketing, Strategic Consultancy, SEO, Paid Search, Paid Social, Email Marketing, Customer Lifecycle Marketing, Content Marketing
Industries Served: Ecommerce, Retail, D2C, Fashion, Beauty
Notable Clients: Wrangler, Lee, Emma Bridgewater, Bluebella, Philip Kingsley, Ark Skincare, LuxDeco
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Reload Digital (s360 UK)
12. Opefir Agency
About: Opefir Agency LTD is a conversion optimization and digital agency offering services such as conversion rate optimization, store automation, and B2B website development. Registered in the UK, the agency focuses on driving business growth through tailored digital and e-commerce solutions.
Key Services: Conversion Rate Optimization, Store Automation, B2B Website Development, E-Commerce Development, Web Development
Industries Served: Not publicly stated
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Opefir Agency
13. The Good Marketer
About: The Good Marketer is a London-based digital marketing and Shopify development agency that helps small and medium-sized enterprises grow their online presence. They provide tailored Shopify website building, custom coding, UX-focused design, and ongoing platform optimisation alongside integrated marketing strategies.
Key Services: Shopify Development, eCommerce Development, Web Development, Conversion Rate Optimisation, Digital Marketing, SEO, PPC, Email Marketing, Social Media Management, Branding & Logo Design
Industries Served: Fashion, Jewellery, Food & Drink, Health & Beauty, Pet, FMCG, D2C, Home & Garden, Education, Professional Services
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: The Good Marketer
14. Flipify Media
About: Flipify Media is a digital agency that designs, builds, and optimises bespoke Shopify e-commerce websites. They also offer performance marketing, SEO, and AI consultancy services to help businesses grow online.
Key Services: Shopify Website, E-com Starter Package, SEO, Google Ads, Social Media Ads, AI Chatbot Solutions
Industries Served: Not publicly stated
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Flipify Media
15. Digital Agency Sheffield
About: Digital Agency Sheffield is a web design, development, and digital marketing agency based in Sheffield, United Kingdom. They specialize in e-commerce solutions, including Shopify store creation, web development, and digital marketing services.
Key Services: Shopify store design and development, Web design, Web development, E-commerce development, SEO, Digital marketing, Branding services, Social media marketing
Industries Served: Not publicly stated
Notable Clients: No client publicly named on the firm's own site
Locations: Sheffield
Pricing: Quote-based
Great For: Not publicly stated
Website: Digital Agency Sheffield
16. Function London
About: Function London is an e-commerce agency specializing in technical development, performance optimization, and custom Shopify architecture. They focus on building fast, accessible, and technically strong storefronts for fashion, luxury, and high-growth retail brands. Their expertise spans bespoke theme development, compliance, internationalization, and ongoing technical support.
Key Services: Strategy & Consultation, Technical Development, Unified Commerce & Integrations, Compliance, Ongoing Support, Data Migrations, Integration Services
Industries Served: Fashion and luxury retail, Streetwear, Skincare and beauty, Jewellery
Notable Clients: Jessica McCormack, Represent
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Function London
17. Bird Marketing
About: Bird Marketing is a full-service digital marketing and web agency headquartered in London, United Kingdom. They provide comprehensive web development and digital solutions tailored for ecommerce platforms like Shopify, WooCommerce, and Magento.
Key Services: Web Design, Web Development, eCommerce Websites, SEO, PPC, Social Media, Branding, UI/UX
Industries Served: Ecommerce, Fashion, Finance, Healthcare, Real Estate, SaaS, Small Business
Notable Clients: No client publicly named on the firm's own site
Locations: London
Pricing: Quote-based
Great For: Not publicly stated
Website: Bird Marketing
18. Premiere Creative
About: Premiere Creative is a boutique digital ecommerce agency based in Millburn, New Jersey, focusing on revenue growth and online scaling. They design and build high-performing websites and Shopify stores tailored for ecommerce, DTC, and B2C brands. Their core offerings span conversion-first design, SEO foundations, paid media acquisition, and email marketing automation.
Key Services: Shopify store design and development, Ecommerce website design, Search Engine Optimization (SEO), Pay-Per-Click Advertising (PPC), Email Marketing Automation, Amazon and Walmart Marketplace Marketing
Industries Served: Ecommerce, DTC, B2C
Notable Clients: No client publicly named on the firm's own site
Locations: Millburn, New Jersey
Pricing: Quote-based
Great For: Not publicly stated
Website: Premiere Creative
Quick Comparison Table
| Agency | Key Specialty | Starting Price | Best For |
|---|---|---|---|
| 1. Web Tonic | Full-Service Performance Marketing | USD $3,000/mo | Mid-market to Enterprise |
| 2. Charle Agency | Shopify Web Design | Quote-based | Not publicly stated |
| 3. Avex E-commerce Agency | Shopify Plus Development | Quote-based | Not publicly stated |
| 4. Eastside Co | Shopify Web Design | Quote-based | Not publicly stated |
| 5. Medito Digital | Shopify Store Development | Quote-based | Not publicly stated |
| 6. Shero Commerce | Shopify Development | Quote-based | Not publicly stated |
| 7. Sniro Ltd | Web Development | Quote-based | Not publicly stated |
| 8. EXENLABS Shopify Agency | Shopify Store Setup | Quote-based | Not publicly stated |
| 9. Genie Crawl | Ecommerce Development | Quote-based | Not publicly stated |
| 10. Nautilus Marketing | Web Design | Quote-based | Not publicly stated |
| 11. Reload Digital (s360 UK) | Digital Marketing | Quote-based | Not publicly stated |
| 12. Opefir Agency | Conversion Rate Optimization | Quote-based | Not publicly stated |
| 13. The Good Marketer | Shopify Development | Quote-based | Not publicly stated |
| 14. Flipify Media | Shopify Website | Quote-based | Not publicly stated |
| 15. Digital Agency Sheffield | Shopify store design and development | Quote-based | Not publicly stated |
| 16. Function London | Strategy & Consultation | Quote-based | Not publicly stated |
| 17. Bird Marketing | Web Design | Quote-based | Not publicly stated |
| 18. Premiere Creative | Shopify store design and development | Quote-based | Not publicly stated |
Frequently Asked Questions
Why does this London shortlist stop at seventeen external firms?
Because the evidence bar removed the rest. We started from the digital, web and ecommerce businesses a London search surfaces, then read each site for published store work: Shopify or ecommerce service pages, migration write-ups, platform partner status or documented builds. Firms whose only reference to ecommerce was a menu item, whose sites were dormant, or whose own logo could not be verified did not survive the read. Seventeen did, and we did not pad the list to reach a rounder number.
Which of these firms name Shopify rather than ecommerce in general?
Twelve of the seventeen: Charle, Eastside Co, Medito, Shero, EXENLABS, Genie Crawl, The Good Marketer, Flipify, Sniro, Digital Agency Sheffield, Premiere Creative and Avex. The rest sell store building, web development or ecommerce growth without committing to a platform on the pages we read, which usually means the platform is decided per project. Ask which platform they would recommend for your catalogue and why, and ask it before the first invoice rather than after the theme is chosen.
Which London firms name clients you can check yourself?
Six. Charle names Cambridge Satchel and Candy Kittens, Eastside Co names Absolute Collagen, Reload Digital names Wrangler and Emma Bridgewater, Avex names Hugo Boss, Medito names Dior, and Function London names Represent. The others credit nobody on the pages we read, which is not disqualifying for a small studio bound by client confidentiality, but it does mean references have to come out of the first call. Ask for two live stores in your category and permission to contact the people who commissioned them.
How should a brand compare quotes when almost nobody publishes a price?
Force every bidder onto the same grid. Not one of them publishes a build price or a retainer. Ask whether the quote is a fixed build or time and materials, what the post-launch retainer costs, whether the theme code is yours or licensed, who holds the Shopify Partner account, how redirects and historic order data are handled in a migration, and what a change request costs in month four. Two quotes for one brief routinely differ threefold on those lines.
Does the agency have to be inside London?
Not really, but you should know where they are. Thirteen of the seventeen publish a London base and Shero Commerce is based in Red Hook, New York, Premiere Creative in Millburn, New Jersey, Digital Agency Sheffield in Sheffield and Avex in New York. Proximity matters for photography days, warehouse visits and stakeholder workshops, and almost nothing else in a build. What matters more is whether the developer writing your theme is an employee or a subcontractor, and which timezone they answer support tickets from.
Choosing a Shopify Development Agency in London
Thirteen of the seventeen external firms publish a London base, so location alone will not narrow this list. Specialism does: twelve commit to Shopify in writing.
Six name a client you can verify. Not one of them publishes a build price or a retainer. Ask what the retainer after launch costs and who owns the theme code when the contract ends.
Migration, not design, is what usually goes wrong. If you are moving a live store, ask how redirects, historic orders and customer accounts are handled, and who is accountable in the first week of trading.
Whoever you brief, insist the build and the demand that lands on it are read in one report, because a fast store nobody visits is a design project rather than a commercial one. If you would rather have the build, the growth programme and the reporting in one place, read our latest analysis or see how we work in London.
