Web/App Development & UX Design
Building digital products, websites, landing pages, and conducting Conversion Rate Optimization (CRO).
What is a Web/App Development & UX Design?
Web/App Development & UX Design is the combined discipline of engineering and user-centered design that builds, tests and optimizes websites and mobile applications across front-end, back-end and API layers. It produces functional, accessible, performant and localized digital products that meet security, privacy and regional regulatory requirements.
Key Web/App Development & UX Design Companies
Attekmi
White-label ad exchange and ad server software for publishers.
Reset Digital
Omnichannel programmatic adtech platform with managed services and white-label tools.
Mediaplus
Global media agency offering planning, buying, analytics and AI-enabled consulting.
Smarketer
Performance marketing agency focused on Google and Microsoft advertising.
DataWave
Israeli AdTech firm combining DSP, ad serving, services and owned media.
Astound Digital
Enterprise commerce consultancy for experience, integration, and growth.
Brave Bison
Digital marketing group spanning services, consultancy and owned media monetisation.
Mobavenue
Indian adtech platform spanning programmatic buying, monetisation and marketing services.
TRG – The Reach Group
German digital media agency for performance, programmatic and analytics.
web-netz
German digital agency for performance marketing and web development.
Bertelsmann
Diversified media, publishing and services holding company.
Tinuiti
Performance marketing agency with proprietary measurement technology.
ViSTARS AI
Programmatic ad tech stack with software, trading and consulting.
Direct Digital Holdings
Dual-sided adtech platform for publisher monetisation and media buying.
fischerAppelt
Integrated German agency group for communications, media and digital delivery.
Nivoria
Data-backed digital marketing agency for email, media buying and growth.
PTA Group
Boutique Slovak digital marketing agency for strategy, media and growth.
Deloitte Digital
Enterprise digital consultancy combining strategy, creative, technology and marketing operations.
DEPT®
Digital agency group combining managed services with proprietary marketing operations tools.
Digital Group
Spanish full-service digital marketing and consulting agency.
Titan Digital Marketing
Full-service agency for SEO, content, social, web and local growth.
Elevation Marketing
B2B agency for channel marketing, media, martech and analytics.
nexum
Digital consultancy delivering strategy, CRM, commerce and experience implementation.
Bird Marketing
UK agency for SEO, paid media, social and web services.
DISH
US subscription TV, streaming and advertising inventory business.
Goodway Group
Independent media consultancy blending commerce activation, measurement, and programmatic buying.
QueryClick
Performance marketing agency with proprietary attribution and programmatic technology.
WebFX
Digital marketing agency with attribution and CRM software.
Ad2.0
German digital marketing agency for SME acquisition and visibility.
Plan.Net
Digital agency for consulting, CX, commerce, CRM and performance marketing.
Digitree Group
Polish MarTech and digital services group with SaaS and agency revenue.
Excom Media
Swiss DOOH sales house focused on pharmacy and retail screens.
Impression
Digital agency for paid media, CRO, CRM and digital PR.
Intellibright
Performance marketing agency for SEO, paid media, and revenue operations.
Thrive Internet Marketing Agency
Digital marketing agency with local marketing software for businesses.
Factors.ai
B2B revenue intelligence and ad optimisation software platform.
Ignite Visibility
Digital marketing agency for enterprise and multi-location growth.
PUBLICA4
Programmatic media and high-impact creative production specialist.
Merkle, a dentsu company
Enterprise customer experience consultancy with identity and loyalty software.
GrowthHit
Growth agency for e-commerce brands with CRO-led managed services.
Initiative
Media agency for planning, buying and performance-led brand growth.
Retex
Retail technology and transformation group for omnichannel commerce.
SSMAS
Publisher monetisation software and services for programmatic revenue growth.
Stackline
Enterprise retail media and commerce software for brands and retailers.
Straight North
Digital marketing agency focused on SEO, paid media, and lead generation.
BlueVector AI
Low-code AI software for regulated enterprise workflows.
Fnac Darty
European omnichannel retailer monetising commerce, services, marketplace and retail media.
Huemor
B2B web design and development agency for conversion-focused websites.
KUPONA
German performance marketing agency with e-commerce conversion recovery software.
VML
WPP-owned enterprise marketing, media and transformation consultancy.
Adlib Advertising
Full-service advertising agency for media, creative and campaign execution.
Ironpaper
B2B growth agency focused on demand generation and ABM.
mgo / Mediengruppe Oberfranken
German regional media group selling audiences, advertising and marketing services.
NEW WAY
Slovak digital agency for websites, e-shops and performance marketing.
NEXA
Digital growth agency offering marketing, development and HubSpot services.
Stagwell
Marketing holding company combining agencies, research, and SaaS tools.
Accedo
B2B OTT software and services for streaming platforms.
B2B Media Group
Managed B2B demand generation and verified lead delivery provider.
Classy Llama
Digital commerce consultancy for ecommerce builds, integrations and growth services.
OCM Digital Media
Publisher monetisation platform and adtech services provider.
Poller & Jordan Advertising Agency
Miami agency for websites, paid media, and local advertising.
Social Heaven
UGC creative agency for performance marketing and paid social.
Backbase
Enterprise banking platform for digital sales, servicing and AI workflows.
Claneo
German SEO consultancy for e-commerce and enterprise organic growth.
Cleverbridge
Merchant of record platform for global software and SaaS commerce.
Digital Gravity
Dubai digital agency for marketing, web, app and branding services.
How Web/App Development & UX Design fit into the ecosystem
Think of it like constructing and furnishing a storefront: developers assemble the structure, wiring and checkout systems while UX designers map the customer flow, signage and layout so people can find and use the product easily. You’ll find cross-functional teams—product managers, engineers, designers, QA and analytics—working in iterative cycles, deploying features, running A/B tests and refining based on real user data. The work plugs into CDNs, identity providers, analytics, ad/martech stacks and payment gateways so performance, attribution and compliance hold up across devices and markets. Good practice includes localization, accessibility and app-store or regional compliance baked into the delivery pipeline.
Market structure and positioning
The market is fragmented: specialist agencies, full-service consultancies, in-house product teams and freelancers sell development and UX services to startups, scaleups, enterprises and government clients. Platform owners (Apple, Google), cloud providers and martech/analytics vendors shape technical standards and distribution channels, while local regulators and app-store rules influence compliance and go-to-market. Pricing models vary from fixed-bid projects and retainers to managed services and productized design systems, with higher premiums for proven regional expertise and platform integrations. Procurement decisions are typically driven by product leaders, CTOs and CMOs who balance speed, cost and long-term maintainability.

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