A product design agency is the partner you hire when the thing you are building is software that people log into and use every day, not a brochure site. The best digital product design agency teams run discovery with real users, shape the information architecture and flows, design the interface, and leave behind a design system your engineers can build from. This list covers software product design only: web apps, mobile apps and SaaS platforms. Industrial and physical product design firms are a different discipline and are not included here.
We looked for product design agencies and studios with public case studies on their own websites that show the full arc of the work, from research and UX through UI and a maintainable component library. Many of these teams now design and hand off in Figma, so a clean, well-organized design file is part of what you are buying. If you only need a marketing site for a software company, see our guide to SaaS website design agencies instead.
The studios below range from small senior teams that suit a seed-stage startup to multi-office firms that redesign enterprise platforms. Each profile notes what the studio actually ships and who it suits best.
Product Design Agencies At A Glance
Company
Headquarters
Best For
Core Services
Lazarev.agency
Mountain View, California, USA
AI and B2B SaaS products
Product redesign, UI/UX, prototyping, design systems
Funsize
Austin, Texas, USA
Enterprise and consumer software brands
Design research, product strategy, UI, design systems
UX studio
Budapest, Hungary
B2B SaaS teams that want research built in
UX research, UX/UI design, design systems, development
UX strategy, UX design, design systems, development
Studio Graphene
London, UK
AI-native products from concept to launch
AI product strategy, product design, development
Big Human
New York, USA
Consumer apps that also need a brand
Strategy, branding, product design, development
Phenomenon Studio
Tallinn, Estonia
SaaS, fintech and healthtech startups
Product design, UX/UI, web and mobile development, MVPs
Best Product Design Agencies In 2026
1. Lazarev.agency — AI And B2B SaaS Product Design From Audit To Design System
Lazarev.agency is a digital product design agency based in Mountain View, California, founded in 2015 and focused on AI, B2B and SaaS products since 2017. Its own positioning is blunt about the work it takes on: making sense of half-built AI features and tangled workflows, then shipping products people use and companies can charge for. The studio says it has worked with more than 600 companies, with Shopify, Accern and Aspen among the names on its site.
The engagement model is spelled out as seven phases: align on outcomes and constraints, audit the current experience, define the experience strategy, prototype the solution, design UI to scale, build the design system and components, then handoff, support and iteration. That sequence is exactly what a buyer should expect from an end-to-end product design partner, and it is unusual to see it published so plainly.
Case studies on the site include Accern Rhea, an AI research product, Elva, an AI video editor, and VT.news, an AI media platform. Services cover product redesign, AI product launches, human and agent experience design, mobile and web app design, and design systems, with brand and demo design available when a launch needs them.
Best for: B2B and AI software companies that need a redesign or a new product taken all the way to a working design system.
2. Funsize — Product Strategy And Design Systems For Enterprise Software Brands
Funsize is a digital experience design agency in Austin, Texas, co-founded by Anthony and Natalie Armendariz. It describes its work as envisioning new ideas and evolving existing products and services, and its client roster is one of the strongest in this space: Atlassian, Intuit, Adobe, Capital One, Credit Karma, Dell Technologies, Peloton and Indeed all appear on its site.
The case studies show the range of a full product design engagement. For Workiva, the studio lists design system development, UX/UI design and visual design. For Grammarly, the work spans design research, design strategy, concept design, UI design and user testing. For Oura Ring, it covers product and design strategy, concept design, UI, visual design and prototyping. Other published projects include Dell Alienware and Half The Story.
Service lines include design sprints, information architecture, wireframing and prototyping, visual design, design system development and user testing. The team is compact, with roughly a dozen people listed on its team page, so clients work directly with senior designers and design directors rather than a rotating bench.
Best for: established software brands that want a senior product team for strategy, concept work and a scalable design system.
3. UX studio — Research-Driven Product Design For B2B SaaS Teams
UX studio was founded in 2013 by David Pasztor and is headquartered in Budapest, Hungary, with a Europe-based global team. The company says it has completed more than 300 projects, and its client list includes Cisco, Brenntag, CrowdStrike, Google, Netflix and the World Food Programme. Its pitch is research-driven design for B2B SaaS products, and its case study library is organized by industry, which makes it easy to find comparable work.
The SaaS section alone includes Oversee AI, an insurance product built to catch AI errors, Duck Creek in property and casualty insurance, and incquery Suite, which turns complex engineering data into dashboards. There are also legal tech projects (Inquisita, Lupl), healthcare work (the OXA biofeedback app, Glide for glucose logging) and fintech products such as Finshape and Zignaly. The studio also builds its own products, UXfolio and Copyfolio, and publishes their conversion results as case studies.
Services cover UX research, UX/UI design, UX consulting, design systems and development, plus an embedded team option for companies that want designers working inside their product squads.
Best for: SaaS companies that want user research and interface design delivered by one team.
4. Hike One — Usable Interfaces For Complex Business-Critical Software
Hike One is an Amsterdam digital product design company whose stated mission is helping organizations make complex, business-critical software understandable and usable. It works on portals, dashboards, planning software and configurators, the kind of internal and B2B tools that rarely appear in design galleries but carry real operational weight.
The client list is heavily Dutch and enterprise: Rabobank, Philips, Schiphol, Heineken, Funda, ANWB, Marktplaats, Liberty Global and Signify, among others. Published case studies include a pension platform for TKP, an administration and financial forecasting system for construction group Dura Vermeer, a climate management interface for Hoogendoorn, the Lightyear companion app and the Liberty Global Horizon Go app.
Engagements are structured as product discovery, product realisation and product coaching, with a dedicated offer around AI and product design. The coaching line is worth noting: Hike One will help an in-house team build its own product design practice, not just deliver screens. The company runs on Holacracy and agile delivery, and works from offices in Amsterdam and Delft.
Best for: European enterprises with complex internal or B2B software that needs to become easier to use.
5. Fuzzy Math — Consumer-Grade Design For B2B And Enterprise Software
Fuzzy Math is a UX design consultancy founded in 2009 with offices in Chicago and Toronto. Its focus is consumer-grade design for B2B and enterprise software, and it organizes engagements around a four-phase system: discover, design, deliver and drive. Clients named on its site include Microsoft, Hyatt and GE.
The case study list reads like an enterprise software portfolio. Fuzzy Math revamped the UI and UX of a legacy data security platform, designed tools for visualizing pharmaceutical trial data, reimagined labor management for Fieldglass, applied design operations and system design at enterprise scale for Availity, and designed a B2B SaaS hiring application for Wonderlic. In a five-year healthcare R&D partnership with GE, it designed for complex data, and for Hyatt it extended a B2C design system across more than 750 hotel websites.
Beyond core UI/UX and research, the firm offers AI integration UX, digital product strategy, UX organization design, and training and hiring support. It also sells short one-week engagements, including a strategy workshop and a UX and competitive evaluation, which give buyers a low-risk way to test the relationship.
Best for: enterprise and B2B software teams with data-heavy products and legacy interfaces to modernize.
6. Made by Many — Prototype-Led Product Innovation With MVPs In 100 Days
Made by Many is an independent digital design and technology studio founded in London in 2007. It specializes in enterprise-scale innovation, combining research, strategy, design, technology and data science, and it says it has developed around 120 products and services for more than 100 organizations.
The studio’s working promise is concrete: prototypes in days and MVPs in real people’s hands within 100 days. Its product portfolio shows how that plays out. It built a mobile-first employee experience app for Nando’s, a mobile ordering platform for restaurant chain Cava, the apprenticeship platform for Multiverse, a photo-sharing app for Swisscom, and a UX redesign for edtech startup Sam Labs. Earlier work includes a mobile coaching app for Adidas and digital-physical service design for Nike.
The leadership team includes a head of product, a head of design and a head of technology, which reflects how the studio works: multidisciplinary teams that co-create with users and carry a concept through to a shipped product rather than handing over a deck.
Best for: large organizations that want to validate and launch a new digital product quickly.
7. Ergosign — UX And Design Systems For Industrial And Professional Software
Ergosign is a German UX design company with about 170 specialists across seven offices in Berlin, Hamburg, Munich, Saarbrücken, Stuttgart, Basel and Zurich. It has been operating for 25 years, and its strength is professional and industrial software where the interface has to support expert users under real working conditions.
Named clients include Lufthansa Technik, BMW, BSH, Hamilton Medical and Linde. Published case studies include a redesign of the Phantom Camera Control software for AMETEK Vision Research and a motion control software redesign for Physik Instrumente, both good examples of complex desktop tools made easier to operate.
The service structure covers the whole product lifecycle. Strategy work includes discovery and journey design. UX design covers vision and concept, visual design, accessibility, human and AI interaction, usability testing and design systems. Development spans web, mobile and HMI software, and an operate line handles maintenance, hosting and continuous improvement. That makes Ergosign one of the few studios here that can take on embedded and machine interfaces as well as web applications.
Best for: manufacturers, medical device makers and enterprises in the DACH region with expert-user software.
8. Studio Graphene — AI-Native Product Design And Build From London
Studio Graphene designs and builds AI-native digital products from studios in London, Delhi, Lisbon and Geneva. It says it has delivered more than 300 products, and its services are split into AI product strategy, AI product design, AI product development and an applied AI lab. Named clients include Coca-Cola, Mars, Diageo, Dow Jones and Nesta.
The case study library is long and product-heavy. It includes Canopy, a renting platform, Mintago for pensions, Drive Fuze for car subscription, Hudson Kapel’s mobile vehicle auctions, a bespoke B2B workflow platform for Locaria, and Hawk, an IoT food safety and compliance system. Newer work leans into AI, including a procurement guidance tool for Cimple and AI portfolio dashboards for GoReport.
Because design and engineering sit in the same team, Studio Graphene suits founders who want one partner to take a product from concept through launch. The company also uses its own delivery intelligence platform, Pulse, to track quality and velocity across projects.
Best for: startups and corporate venture teams building a new AI-enabled product end to end.
9. Big Human — Product Design And Branding For Consumer Apps
Big Human is a technology, product design and branding company established in 2010 in New York, with a presence in Los Angeles, San Francisco and Chicago. It reports producing 80 applications, 262 websites and 50 brands, and it describes its team as designers, engineers, writers and strategists working remote-first.
The product portfolio is where Big Human separates itself from a typical brand agency. Case studies include the original Vine creative video experience, HQ Trivia’s interactive mobile gaming format, TaskRabbit booking and task management UX, a publishing flow for Snapchat, an in-app fitness journey for Chelsea Piers, and Gemini, New York’s first Bitcoin exchange. Plentiful, a platform that modernizes New York City’s food pantry system, shows the studio’s civic work.
Services cover strategy, branding, product design and web, mobile and full-stack development, and the studio has worked on Apple Vision Pro apps and Web3 products. Its industries include fintech, healthcare, travel, e-commerce and startups.
Best for: consumer app founders who need product design and a brand identity built together.
10. Phenomenon Studio — Developer-Ready Product Design For SaaS, Fintech And Healthtech
Phenomenon Studio is a product design and development agency established in 2019, with locations in Tallinn, Estonia, Lugano, Switzerland and Dover, Delaware, and a team of more than 70 designers and developers spread across Canada, the US, Ukraine, Poland and Estonia. Its industry focus is SaaS, healthcare, fintech and edtech.
Published case studies include Isora, a SaaS governance, risk and compliance platform, One Text, a Y Combinator-backed SaaS product, Nomupay in Irish fintech, Airportr in UK logistics and Wisdom in healthtech. The studio emphasizes system-based interfaces and developer-ready components with proper tokens and accessibility standards, and it shares progress openly through Notion, Figma and Jira, which helps engineering teams pick up the work without a messy handoff.
Services run from research (product discovery, UX audits and technical workshops) through web and mobile design, prototypes and branding, to web, mobile and AI development, MVP launches and dedicated team extension.
Best for: SaaS and fintech startups that want design and development in one team with clean engineering handoff.
How To Choose A Product Design Agency
Does The Agency Design Software Products Or Mainly Websites?
Plenty of studios call themselves product design agencies but mostly ship marketing sites. Ask for case studies that show logged-in experiences: dashboards, onboarding flows, settings, permissions and empty states. A real digital product design agency will show you flows and system thinking, not just hero sections. If a marketing site is what you need, a SaaS website specialist or a no-code build partner from our list of Framer agencies and experts is usually a better fit.
How Much User Research Is Built Into The Process?
Good product design studios talk to users before they draw screens. Ask how discovery works, who recruits participants, and how findings change the roadmap. If your main question is why users struggle rather than what to build next, a dedicated partner from our list of UX research and usability testing agencies can run that work on its own, and an existing product may benefit from one of the UX audit companies before a full redesign.
Will You Get A Design System Your Engineers Can Use?
The most durable output of a product design engagement is the component library, not the mockups. Ask to see a sample design file and how components, tokens and variants are named. Most teams now design and hand off in Figma, so check that the file is organized for developers, with documented states and accessibility notes, and ask who supports engineering questions after handoff.
Is A SaaS Product Design Agency Or A Startup Design Agency The Better Fit?
A SaaS product design agency that has redesigned complex B2B platforms will understand roles, permissions, data density and admin tooling. A startup design agency is usually faster at getting an MVP and a brand in front of investors and early users. Match the studio’s portfolio to your stage, and check whether it has shipped products with similar users, regulation or data complexity.
Do You Need Design Only Or Design Plus Development?
Some product design studios hand over files and stay on for support, while others build the product too. A combined team removes a handoff, but it ties you to one vendor’s stack. If you already have engineers, a design-only partner with strong handoff habits is often the cleaner choice. If you do not, ask to meet the developers who will build what the designers propose.
Conclusion
The right product design agency is the one whose case studies look like your product: similar users, similar complexity and a similar stage of growth. Every studio on this list shows end-to-end work on its own site, from discovery and UX through UI and design systems, so start with the two or three whose portfolios are closest to what you are building and ask to see the actual design files behind those case studies.
If your project is narrower than a full product engagement, such as a research study, a UX audit of a live app or a new marketing site, the related guides linked above will point you to specialists in that part of the work.
