| Adage: Providing usability services such as heuristic evaluation and usability testing, based in Finland. |
| Afflatus Inc: Evaluation of usability, information architecture, and the accessibility of sites, based in Dubai, United Arab Emirates. |
| Alertus: Automated feedback system for collecting web usability and performance data, based in Washington, USA. |
| Bolt and Peters User Experience: A user-centered design firm specializing in remote usability testing and ethnogaphic research, based in California, USA. |
| Breakthrough Usability, Inc.: User performance testing services, based in Florida, USA. |
| Don't Make Them Think: Provides a range of consulting services to ensure all the elements of your web site are easier, simpler and more effective to use. |
| Easyenough: Usability testing services from, consultancy based in San Luis Obispo, California, USA. |
| Experience Dynamics: Professional usability and user centered design consultancy based in Oregon, USA. |
| First Insights: Conducts usability testing and qualitative market research, based in New York, USA. |
| framfab: Full service digital agency network servicing clients with marketing and technology solutions, based in the United Kingdom |
| Gokin, Paul: Offers usability evaluations of web sites and applications, based in Vermont, USA. |
| Hawdale Associates Limited: Consulting firm focused on helping clients understand how customers think and buy online and how to design online experiences that work, based in Manchester, United Kingdom. |
| HT Consulting: Provides usability assessment of web sites, software and computer-related hardware, based in California, USA. |
| infoDesign: Information designers, technical writers and web usability analysts, based in Dunedin, New Zealand. |
| Interface IQ: Independant specialist usability, accessibility and information architecture consultancy based in Northern Ireland. |
| IQ Intelligent Internet: Provides companies and government organisations with usability testing and evaluation services, based in Woden, Australia. |
| Metro Research Ltd: International market research and usability consultancy based in the United Kingdom. |
| MicroUsability: User experience testing, consulting and design. Offices in Singapore, Malaysia, Vancouver and the United Arab Emirates. |
| Millennial Living: Resources for web usability and e-Government, based in Arlington, Virginia, USA. |
| North Square: Offers Web site evaluation reports based on navigation, design, content and strategy, based in Wellingborough, United Kingdom. |
| Peak Usability: User experience and usability consultancy based in Brisbane, Queensland, Australia. |
| PinPoint Performance Solutions: Usability testing and needs analysis to support user-centered design and performance improvement based in Idaho, USA. |
| RelevantView: An online market research service to aid in concept testing and website usability testing, based in Connecticut, USA. |
| ResearchHouse: Unique, usability testing facility built into a home setting, based in San Jose, California, USA. |
| Softerware Consulting: Softerware provides usability testing, site audits and information architecture services, based in Indiana, USA. |
| TandemSeven: Design and usability services covering the full application development lifecycle, based in the USA. |
| The Site Therapist: Website prognosis reports that include information pertaining to the health of websites, based in Cary, North Carolina, USA. |
| theSiteDoctor: Provides website evaulations and usability testing, based in North Carolina, USA. |
| UsabilityEffect: Web site usability testing and newsletter conversion checkups, based in Pennsylvania, USA. |
| UsabilityReviews: Offers website optimization services, based in Ontario, Canada. |
| User Centric, Inc.: User experience consulting firm that specializes in usability testing, user experience research and design, based in Illinois, USA. |
| UserMetrics: Offers to test web sites on people and applies insights from cognitive science for usability problems, based in the United Kingdom. |
| Web Critiques: Providing web critiques highlighting the good and bad points about a web site as well as techniques to fix them, based in the United Kingdom. |
| Web Scrutineer: Provides website testing for businesses and web developers, based in Auckland, New Zealand. |
| Web Usability, the Right Way: Consultant service provides a service to make websites stand out from the competition by making them more user friendly. |
| WebCritica: Offers services to evaluate web site usability and gives recommendations how to make sites easier to use, based in USA. |
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