UI/UX web design brings several disciplines together. A project may involve user research, information architecture, wireframes, prototypes, interface design, responsive layouts, usability testing, and development before the finished website is ready for real users.
The companies below approach that work from different angles. Some are design-led agencies focused heavily on UX and visual systems, while others combine UI UX with engineering and full web development. The selection focuses on companies with clear UI UX and web capabilities and a presence in, or established service coverage of, the US market.
Gilzor handles UI/UX web design as part of a broader digital product development process. Its design work focuses on helping users understand a product quickly, reducing friction in complex tasks, and creating interfaces that remain practical once development begins. The team works on both desktop and mobile interfaces and connects design decisions with engineering rather than treating design as a separate stage.
For web projects, Gilzor covers UX/UI design, web design, responsive layouts, intuitive navigation, prototyping, and development. Its designers use tools such as Figma, Webflow, Miro, Adobe Photoshop, and Adobe Illustrator. This makes the company suitable for businesses that want to move from an early product idea through design and into a working web product without changing teams midway through the process.
Clay is a digital design agency with US offices in San Francisco, New York, Austin, and Denver. UX/UI design sits at the center of its work, alongside branding, digital product design, prototyping, product strategy, and design systems. The agency works on both websites and applications, making it a direct match for businesses that need interface design to extend beyond a conventional marketing site.
Its UX practice includes user research, testing, information architecture, design systems, interface design, and broader product strategy. Clay works with startups as well as established organizations across technology, healthcare, ecommerce, mobility, finance, and other sectors. Its approach is particularly suited to projects where the website, product interface, and visual identity need to feel like parts of the same system.
A-listware combines UI/UX design with software development, giving clients access to designers as part of a wider technical team. Its design specialists work on web and mobile applications and cover UX research, user journeys, wireframing, interface design, and related visual work.
The company's design team works on human-centered software interfaces and supports projects across different industries. A-listware can also provide broader development resources, making it practical for businesses that are building a web product from scratch, redesigning an existing interface, or extending an internal team with UI UX expertise.
Ramotion focuses heavily on UI/UX and digital product design. Its work connects product interfaces with brand strategy, helping companies maintain consistency between marketing websites, software products, and larger design systems. The agency works with founders, product leaders, and engineering teams on interfaces where user flows and visual identity both matter.
Its UI/UX practice covers user experience, visual interface design, product design, and design systems. Ramotion is particularly applicable to technology and SaaS companies dealing with complex workflows or products that have grown beyond an initial interface and now need a more systematic design approach.
Designli provides UX/UI design for consumer applications and enterprise software, with responsive web work forming part of its cross-platform capabilities. Its design process begins with discovery before moving through wireframes, concept work, full UI design, clickable prototypes, user feedback, testing, and iteration.
A notable part of its process is SolutionLab, a pre-development sprint used to create a clickable product prototype before production development begins. This makes Designli particularly applicable to startups and product teams that still need to validate workflows and interface decisions before investing in the full build.
21century.tech is an AI-native software studio based in Miami with a remote-first model. Its workflow is development-led, but it can take projects that begin with Figma files, product specifications, or less formal briefs and turn them into production software. Its published project types include landing pages, MVPs, full-stack features, integrations, and legacy refactoring.
For UI/UX web projects, the company is most applicable when the product direction or interface design has already been established and the next step is implementation. Senior engineers handle architecture while AI-assisted coding is paired with human review, testing, documentation, and deployment.
Itexus provides full-cycle UI/UX design covering website design, web application design, mobile interfaces, prototyping, usability audits, usage analytics, and A/B testing. Its design work serves startups, midsize businesses, and enterprises, allowing the process to change depending on whether the project is an early concept or an established product that needs usability improvements.
For websites, Itexus connects UI/UX with development, testing, performance optimization, launch, and ongoing support. Wireframes and mockups form part of its design deliverables, while its web application work can continue from ideation through prototyping and testing into production. The company is particularly experienced with fintech and other products where users interact with substantial amounts of data or multi-step workflows.
DOOR3 is a New York-headquartered technology consultancy and software development company with a dedicated Design & UX practice. Its design capabilities include UI design, design systems, UX audits, user and business research, testing, and solution validation. This gives the company a particularly strong fit for business-critical web products rather than purely visual website redesigns.
Its teams can work across discovery, UX, interface design, and software engineering. DOOR3 has experience with enterprise applications, portals, dashboards, and data-heavy systems, where usability depends on making complex information and workflows understandable. The combination of research, testing, interface design, and development also makes it suitable for redesigning established software rather than only creating new products.
BOWEN is a New York digital agency focused on designing and developing websites for businesses that need more than a visual refresh. Its web work combines UI/UX design, website strategy, information structure, visual design, and development, so usability decisions can carry through to the finished site rather than ending with design files.
The agency works on custom websites and larger digital platforms, including projects where existing user experiences need to be reorganized or redesigned. Its portfolio includes UI/UX design alongside web design and development, making BOWEN a direct fit for companies looking for an integrated website team in the US.
Baunfire is a Silicon Valley digital agency focused on web design and development. UI and UX are central parts of its website work, covering interface design, usability, interactions, accessibility, animation, user experience, and responsive design.
The agency works particularly well for corporate, technology, SaaS, and B2B marketing websites. Its process can include site architecture, wireframes, visual concepts, UI, UX, and development, giving clients a connected path from website planning through launch. Based in San Jose, Baunfire also works closely with technology brands and startups in the wider Silicon Valley market.
WDB Agency is a Boston-based web design and development company serving organizations across the United States. Its work connects digital strategy, UX, creative design, and technology, allowing the agency to take a website from early planning through implementation.
The company is particularly relevant to organizations looking for custom websites rather than interface design as a standalone deliverable. Its approach considers how users interact with content and how the website supports broader goals such as credibility and lead generation. With both design and development available internally, UX decisions can be carried into the working site without a separate technical handoff.
ZaphyrX is a US digital agency providing UI/UX web design alongside web development, application development, and software development. Its service mix makes it a direct fit for businesses that want interface design and technical implementation handled within the same project rather than splitting the work between separate providers.
The company works on websites and other digital products, with UI/UX forming a defined part of its web offering. Development capabilities also extend beyond standard websites into applications and custom software, which can be useful when a web interface is connected to a larger digital product or business system. ZaphyrX is based in Fairfax, Virginia.
ArtVersion is a US-based creative agency and design consultancy working across web design, UI UX design, branding, and development. Its web projects bring strategy, UX, visual design, content architecture, and engineering together, with an emphasis on user-centered experiences that remain manageable as a company's content and digital presence expand.
Its UI UX practice includes user interface design, UX research, usability, accessibility, information architecture, design systems, and interface testing. The agency works on projects ranging from marketing websites to enterprise digital experiences, making it suitable for companies that need deeper UX work without separating it from the visual and technical sides of the website.
Composite is a New York web design and development agency specializing in UX design and Webflow. Its work is aimed largely at scaling technology companies and enterprise teams that need high-performance websites their internal marketing teams can continue managing after launch.
Its services connect UX and accessibility design, information architecture, visual design, and Webflow development. Composite has experience with marketing sites and larger digital platforms, and its approach places particular attention on website performance and maintainability. This makes it a strong fit for companies that want UX thinking applied specifically to the structure and performance of a modern business website.
The UX Department works across strategy, UX/UI design, branding, and development. Its strategy services include research, workshops, usability testing, heuristic evaluation, and information architecture, while its design work covers prototyping, consulting, and UX/UI. The development side includes HTML, CSS, JavaScript, backend work, API integrations, and rapid prototyping.
This mix allows the company to work on websites as well as mobile applications and enterprise software. Its San Francisco location gives it a direct US presence, while its research-heavy process can be useful for businesses that need to understand usability problems before redesigning an interface. The team can then carry those findings through prototyping, UI design, and development.
UI UX web design can shape everything from the first impression of a website to how easily someone finds information, completes a task, or moves through a complex web application. The companies covered here approach that work differently, with some concentrating on UX research and interface design while others connect design directly with development, branding, or product strategy.
For US businesses, the practical choice depends on the project itself. A new SaaS platform may require extensive prototyping and usability work, while a corporate website redesign may put more emphasis on navigation, responsive design, accessibility, and visual consistency. Looking closely at each company's actual UI UX capabilities, web experience, development resources, and typical project scope can help narrow the options to teams whose process matches the work that needs to be done.
