Whoozy is a voice branding and UX/UI sound design agency in Amsterdam operating globally.

As one single team, we work closely with our clients to identify, design, and create experiences and services that people love.

years in business


We create world-class sonic assets and voice branding through data-driven and knowledgeable design.

As a voice branding agency, we help you define, design and develop your Brand Voice. Through inclusive, data-driven design, we help you to exploit the power of voice and the act of speaking itself. Make sure you are perceived as desired and build stronger relationships.

We’re a voice branding agency offering a complete solution from voice curation and user testing to strategy and speaking style guides. We help you to build a knowledgeable data-driven design system based on which you can create future voices and make responsible design decisions to meet customer needs at all touch-points.

We specialize in providing custom speech data sets to ensure your voice-enabled technology provides the best experiences. Voice-enabled products and services come in all shapes and sizes. Some projects have specific acoustic requirements or voice talent criteria that require good planning, creativity, and an innovative mindset. No matter the scope or scale, we are passionate about our expertise in providing custom speech dataset solutions for every project.

We help you to build world-class custom text to speech voices. From research to identify opportunities and business impact to speech data production and consultancy on development, cloud services, and deployment strategies. 

UI/UX sound design is a defining factor for a lot of products these days. We’re a user experience, and user interface design agency focused on improving functionalities and increasing customer engagement. As a UX/UI sound design agency, we create audible assets that provide outstanding usability while fully embracing your brand’s identity.

Our UI/UX Sound design capabilities specialize in product sonification, mobile apps, web applications, physical products, and multi‑platform experiences. While embracing your brand’s identity, our design efforts always provide excellent usability.

A brand today is all about how it makes your customers feel. Managing this concept requires a cohesive system that spans across all mediums and touch-points. We’re a branding agency offering a complete solution from production and sound logo design to strategy and style guides.

Our design and production agency based in Amsterdam provides audio engineering and production services. As a production company, we produce custom and exclusive sound assets.

We’ve partnered with everyone from early startups to Fortune 500 companies.


For us, the user experience is most important. We focus on the user. It’s the base of everything we do at Whoozy. We began in Amsterdam as a traditional sound design and branding agency. We rapidly expanded our services to digital products and emerging technologies such as Conversational AI, AR/VR, and 3D Audio. 

We work on various UX/UI and branding projects. We create new products and voice brands together with design teams. And we also do redesign and rebranding projects that update existing sonic assets and define a voice branding strategy for global brands. 

User research, usability testing, acoustic analysis, prototyping, explorations, data-driven exploitation are just a few of the key components we focus on to help you create successful products and services.

We’re a sonic company that believes sound design can effectively turn customers into ambassadors while staying consistent with the brand. Good design leads to memorable experiences and better conversion rates. That’s why, unlike other sonic agencies, we have sound designers, engineers, UX/UI designers, and strategists collaborating on projects.

We excel at converting creative energy into practical, result-driven, and delivery-orientated design.

There are many capable UX/UI sound and sonic branding agencies in Europe alone and even more internationally. Each with a unique workflow.

So, what makes us different from other agencies? Our unique methodological and data-driven way of working. Our craft, engineering skills, and quality of work. Our transparent and flexible way of closely working together with our clients.

In all facets of the design and strategy process, we are driven by data, feedback, and methodologies specified on context and our client’s unique use cases.

We design simple and smart voices, sonic branding strategies, and sound assets to represent and amplify your brand. On top of that, our team is multidisciplinary. We have UX/UI sound designers, strategists, and data analysts. 

We merge creative design, data analysis, and strategic skills in our design process, unlike other traditional sound design and sonic branding agencies.

Yes and, we certainly will. We’re known to combine brand identities and sonic design with creativity and intelligent solutions for product sonification. Our sonification translates, interacts, and engages people, allowing you to build stronger relationships with your customers.

With creativity and our data-driven approach, we explore different and innovative ways to design with simplicity.

Unlike some other agencies that primarily focus on one of the sonic branding landscape areas, our agency capabilities address the full scope for product sonification in the digital era.  

Yes, we do. We position ourselves as a voice branding and UX/UI sound design agency for the digital and audio-driven era. We believe in consistent and efficient design. We help our clients to align and exploit effective and cohesive branding systems.

We are tech-savvy, unlike other traditional sonic or sound agencies. Our branding capabilities are data-driven and include research, brand strategy, and personality studies. We design brand voices, sound logos, sound design assets, style guides, development and implementation strategies, etc…

Often our clients provide us with a brand strategy or the complete visual and/or persona identity guidelines. We use this as the foundation and make sure we extend and enrich the brand identity and persona while staying true to the design and brand strategy.

Our pricing is directly related to the project timeline, deliverables, scope, and team composition. When a project is dynamic and not set in stone, our pricing is based on an hourly rate, where you pay us for the time and materials we spent. Most of our projects have fixed price agreements, which are based on a detailed proposal. 

For example, a typical project with a design agency could take ten weeks and cost €80k to €200k. We will create personalized rates for your project depending on the required team size for the time, deliverables, and engagements. Junior designers are charged €85 per hour, and design executives are paid €200 per hour. We also have discounted pricing for startups. To get a quote, please send us an email.

As an Amsterdam‑based UX design agency, we partner with startups globally. We adore bringing ideas to life with creativity that amplifies the founder’s ideology. We enjoy fast, flexible, and agile environments that challenge our skills and design process. Reach out to us and ask for our startup rates.

Yes, yes, yes! We are up for the challenge. We are one of the few agencies that love to enrich and re-design strategies and designs that are already in place. Re-designing is a skill that requires creativity and simplicity without losing the brand’s core identity, assets, and strategies in place—transformation without losing the brand associations you’ve already build. Over the years, we’ve refined our design methodology, especially for re-design projects. Each re-design project starts with a comprehensive exploration and analysis process to thoroughly immerse ourselves in the brand, its assets, previous strategies, and project data.

Our services range from acoustic analysis and sonic data exploration to UX/UI sound design, prototyping, and user testing, as well as full voice branding and sonic identity design. Our design agency often works side-by-side with in-house design teams or innovative departments, enabling us to work and move fast and act as an independent entity avoiding large organisations’ bureaucracy.

Our design philosophy is based on design thinking, which enables us to be adaptable to almost any project and form of collaboration. Although each project is different, we still go through the same main stages:

Discovery & Research

Design Strategy & Concepts

User testing

Design Definition

Guidelines & Implementation Strategy

Please send us an email first with a brief description of your project or an RFI/RFP. We respond within 24 hours to set up an introduction call and to answer any pressing questions.

We’ll ask a couple of questions about the project objectives, demographics, budget, timeframe, and other relevant details on our first call.

We start with a call to learn as much as possible about the project. Based on this information, we try to estimate the project’s costs as accurately as possible in a proposal that includes a detailed description of the design approach, the project’s stages, deliverables, activities, touch-points, team, and other relevant details. 

Let's talk.


Kattenburgerstraat 5
1018JA, Amsterdam