Adage Usability - Providing usability services such as heuristic evaluation and usability testing, based in Finland. - http://www.adage.fi/
Web Usability, the Right Way - Consultant service provides a service to make websites stand out from the competition by making them more user friendly, based in USA. - http://webusabilitytherightway.com/
Atlantic Human Factors - Usability consultancy focused on understanding user behavior, abilities, and skills and applying that knowledge to the design of efficient and easy to use interfaces and workflows. Based in Florida, USA. - http://www.atlantichumanfactors.com/
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. - http://www.hawdale-associates.co.uk
UsabilityReviews - Offers website optimization services, based in Ontario, Canada. - http://www.usabilityreviews.com
User Centric, Inc. - User experience consulting firm that specializes in usability testing, user experience research and design, based in Illinois, USA. - http://www.usercentric.com/
MicroUsability - User experience testing, consulting and design. Offices in Singapore, Malaysia, Vancouver and the United Arab Emirates. - http://www.microusability.com/
The Site Therapist - Website prognosis reports that include information pertaining to the health of websites, based in Cary, North Carolina, USA. - http://www.thesitetherapist.com/
Metro Research Ltd - International market research and usability consultancy based in the United Kingdom. - http://www.metroresearch.com/
Interface IQ - Independent specialist usability, accessibility and information architecture consultancy based in Northern Ireland. - http://www.interfaceiq.com/
TandemSeven - Design and usability services covering the full application development lifecycle, based in the USA. - http://www.tandemseven.com/
PinPoint Performance Solutions - Usability testing and needs analysis to support user-centered design and performance improvement based in Idaho, USA. - http://www.pinpointperformance.net/
infoDesign - Information designers, technical writers and web usability analysts, based in Dunedin, New Zealand. - http://www.infodesign.co.nz/
Peak Usability - User experience and usability consultancy based in Brisbane, Queensland, Australia. - http://www.peakusability.com.au
Experience Dynamics - Professional usability and user centered design consultancy based in Oregon, USA. - http://www.experiencedynamics.com
framfab - Full service digital agency network servicing clients with marketing and technology solutions, based in the United Kingdom - http://www.framfab.co.uk/
ResearchHouse - Unique, usability testing facility built into a home setting, based in San Jose, California, USA. - http://www.researchhouse.com
IQ Intelligent Internet - Provides companies and government organisations with usability testing and evaluation services, based in Woden, Australia. - http://www.iqi.com.au/index.shtml
UsabilityEffect - Web site usability testing and newsletter conversion checkups, based in Pennsylvania, USA. - http://www.usabilityeffect.com/
First Insights - Conducts usability testing and qualitative market research, based in New York, USA. - http://www.firstinsights.com
North Square - Offers Web site evaluation reports based on navigation, design, content and strategy, based in Wellingborough, United Kingdom. - http://www.north-square.com
Web Scrutineer - Provides website testing for businesses and web developers, based in Auckland, New Zealand. - http://www.webscrutineer.com/
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. - http://www.webcritiques.net/
UserMetrics - Offers to test web sites on people and applies insights from cognitive science for usability problems, based in the United Kingdom. - http://www.usermetrics.net/
theSiteDoctor - Provides website evaulations and usability testing, based in North Carolina, USA. - http://thesitedoctor.com/
HT Consulting - Provides usability assessment of web sites, software and computer-related hardware, based in California, USA. - http://www.htamler.com/
Gokin, Paul - Offers usability evaluations of web sites and applications, based in Vermont, USA. - http://www.paulgokin.com
Breakthrough Usability, Inc. - User performance testing services, based in Florida, USA. - http://www.breakthroughusability.com/
Bolt and Peters User Experience - A user-centered design firm specializing in remote usability testing and ethnogaphic research, based in California, USA. - http://boltpeters.com/
Alertus - Automated feedback system for collecting web usability and performance data, based in Washington, USA. - http://www.alertus.com/
Afflatus Inc - Evaluation of usability, information architecture, and the accessibility of sites, based in Dubai, United Arab Emirates. - http://www.afflatusinc.com/