Best Product Design Agencies (2026)

Thoughtworks began in Chicago in 1993 and now works across 18 countries. For Sparta Systems, a quality management software company, it helped turn Sparta's quality management expertise into a new multi-tenant SaaS product for small and medium-sized companies, on a 12-month deadline, with a simplified interface. In the first months, Sparta's developers worked from Thoughtworks' New York office to pick up agile practices, and the new way of working has technologists collaborating directly with product owners and users. For the literacy app Learn with Homer, Thoughtworks helped bring characters and illustrations into a gamified learning product and tested it closely with children and parents.

For mid-market and enterprise companies, Isadora Agency has designed products and websites since 2009. The team prototypes at varying fidelities and tests with real users. For The Honest Company, Isadora redesigned the diaper subscription around a landing page that works as onboarding and a bundle builder where parents mix sizes and prints, plus a subscription management tool shaped by testing. The exit and bounce rate fell 75%, and subscription retention rose 60% after the first seven months. For Sunbit, a fintech company offering installment financing, separate Isadora teams designed a customer portal dashboard and a mobile app in parallel and built a lead-generating marketing site.

Designit is a Wipro-owned experience innovation company, founded in 1991, whose offerings include UX and service design. WindowMaster, a clean-tech company that makes natural ventilation systems, asked it for a go-to-market vision for a new IoT product in the US. Designit's team met industry experts and end users in the Bay Area to understand the barriers to natural ventilation in a market that has traditionally relied on HVAC. The outcome included a prototype app that shows tenants their indoor climate and lets them control it, and a prototype dashboard with control settings for landlords and facility managers. Designit has also designed digital tools for manufacturing for the industrial engineering group Sandvik.

Method is a design and technology firm founded in 1999 with five locations, and it's operated within GlobalLogic since GlobalLogic acquired it in 2011. For Cegid, a French accounting software provider moving from business customers to consumers, Method designed and built Cegid Flow, a small-business app whose dashboard shows bank balance and monthly cash flow at a glance. The team co-created the app with entrepreneurs and their accountants and held regular user validation sessions throughout design and build. For a scientific information company, Method aligned eight expert stakeholders on a new research platform and built its prototype entirely with real content.

WONGDOODY runs 24 design studios. Its product experience practice covers customer experience and product work, plus StudioNext for employee self-service in HR and IT, and its method centers on working prototypes. For a carmaker's Canadian business, WONGDOODY built the Intelligent Companion, an AI tool that lets shoppers explore a new 2025 SUV in a branded 3D environment and ask questions in two languages. The team reached a proof of concept in four weeks and tested the tool with Canadian target audiences before launching it 12 weeks after the first conversations.

EPAM is a public software engineering company founded in Princeton, New Jersey, in 1993, and EPAM Continuum is its design and consulting practice. For INEOS Automotive's Grenadier 4x4, the Continuum team began with an eight-week remote discovery, then designed the direct-to-customer buying platform: the user experience and copy for the vehicle configurator, a checkout covering deposits, price lock, part exchange and financing, and an account area that shows buyers their payment details, with the site notifying them as the order moves through each stage. The platform runs on headless Sitecore with SAP Commerce Cloud and Salesforce. EPAM Continuum also designed the "Store of the Future" concept for the convenience-store chain MAPCO and a trading device for IPC Systems.

Deloitte Digital is the creative consultancy within Deloitte Consulting. For the WNBA, it ran fan research and competitive benchmarking, wrote a multiyear digital strategy and product roadmap for the league's app, and rebuilt the app on a modular infrastructure that supports personalization. The rebuilt app launched in 2022, and Deloitte and the WNBA's digital products team have shipped releases since, covering onboarding, content formats, stats and sponsorship features. Other app work includes a mobile advice and CRM tool for Zurich Insurance agents and the interface design for Malta Public Transport's Tallinja app and web portals.

NTT DATA's Tangity network lists product and brand experience design among its services. For Spain's national rail company, it helped create dōcō, a mobility-as-a-service app that lets travelers book and pay for trips combining trains and taxis with other services on one ticket. The work began with research into travelers' mobility needs and the market. The team then co-created the value proposition and business model and checked them against a business case before designing the brand and the app. The app was planned for continuous releases informed by real-time feedback and data.