Abacus Web Usability
- Consultants to help you improve the user friendliness of your web site, located in Florida, USA.
- http://www.abacuswebservices.com/

Clickdensity
- Offers a tool to record the position of every click on a web page, creating a virtual heat map of visitor activity. Includes details of benefits and how it works, together with a free demonstration.
- http://www.clickdensity.com/

Incontext Enterprises
- Provides design, training, and market information services. Located in Massachusetts, USA.
- http://incontextdesign.com

Serco Usability Services
- London, UK based independent usability consultants, covering websites, interactive TV, interactive appliances and mobile Internet devices.
- http://www.serco.com/usability/

ePerformance Consulting
- Consulting services covering usability, information architecture, user experience design, search engine optimisation and complete website design. Located in the UK.
- http://www.eperformance.co.uk/

Dreamstep Design
- User Centered approach to interface analysis and design.
- http://kevinbury.com

Centralis
- A user experience consultancy offering research, testing and design expertise to develop interactive applications. Located in Illinois, USA.
- http://www.centralis.com

Foolproof Business Services
- Examining the online sales process from the customer's point of view. Located in England.
- http://www.foolproof.co.uk

Experience by Design
- Washington, DC based information architecture and user experience consultancy for websites & software.
- http://www.experiencebydesign.com

Usablity Glossary
- Boston Web firm offering information architecture, interaction design, usability consulting, and copywriting.
- http://www.bobgoodman.net/main/glossary.html

KeyLabs Software Testing Products and Services
- KeyLabs is an independent testing lab providing web site application performance testing.
- http://www.keylabs.com

Idean Research
- Offering user experience research services and consultation in usability for the products of the digital world, especially wireless ones. Located in Finland.
- http://www.ideanresearch.com/

Design Interpretive
- Integrated delivery of user interface design, industrial design, and usability assessment and testing services. Located in Ottawa, Canada.
- http://www.designinterpretive.com/

Erik More
- User experience consulting services focused on usability engineering, information architecture, and interface design. Located in California.
- http://www.erikmore.com

Cox & Hall Interaction Design
- Texas design consultantancy specializing in user interface and interaction design, visual communication, and usability for products requiring human-computer interaction.
- http://www.coxhall.com

gotomedia, inc. - interaction design and usability consulting
- Offers customized user experience and branding solutions. Notable clients include Macromedia & WebEx.
- http://www.gotomedia.com

Effortmark Ltd.
- Usability Consulting firm based in Leighton Buzzard, UK. Focuses include making web sites and particularly web forms easier to use.
- http://www.effortmark.co.uk

Usability by Design Ltd
- Offering usability and design consultancy to the e-commerce and client server markets in Europe. Located in London, United Kingdom.
- http://www.usability.uk.com/

fhios
- Offers user research and services for the complete design and development process including usability testing. Based in London, United Kingdom.
- http://www.fhios.com

flyTrap Interactive
- Offers user interface design services at all phases of application development, including working prototypes for web and interactive multimedia applications. Based in San Diego, California, United States.
- http://flytrapinteractive.com/

Sliced Bread Interaction Design
- User interface design consultancy creating online, desktop, and handheld products and services. California, United States.
- http://www.slicedbreaddesign.com/

Jeff Brace Design
- Consulting services include business analysis, information architecture, user interface design, and usability evaluations. Located in British Columbia, Canada.
- http://members.shaw.ca/jeff.brace/

Interaction Architect
- Sim D'Hertefelt offers services for designing usable interactive systems, includes articles. Located in Belgium.
- http://users.skynet.be/fa250900/

Experience Research - Richard Linington
- Ethnographic research leading to the creation of useful and desirable user experiences. Located in the United Kingdom.
- http://www.experienceresearch.com/

Fields, Jason: air-port
- Evolving technology and delivering a more compelling and dynamic digital experience to end users online and offline. Based in California, USA.
- http://www.air-port.com/

Membex
- Specializing in interface design, usability testing, site development, database architecture, and ecommerce sites. Located in Pennsylvania, USA.
- http://www.membex.com/

Pamam
- Solutions for user interface design and human factors engineering. Located in Israel.
- http://www.pamam.com/

Usable Interface
- The portfolio and resume of Kyle Pero, a usability analyst, interaction designer, and information architect consultant based in Pennsylvania, USA.
- http://www.usableinterface.com

Vista Point Consulting
- Provides web site design and evaluation services for small and mid-sized businesses. Focus on usability, customer-focused content and clean design. Based in Renton, Washington, United States.
- http://www.newvistapoint.com/

Information & Design
- Offers usability consulting. Includes resources, articles and courses. Located in Melbourne, Australia.
- http://www.infodesign.com.au/

Web Site Optimization, LLC
- Consulting firm offering Web optimization services and information. Located in Michigan, USA.
- http://www.websiteoptimization.com

Evan Media
- Creation of user-centered interface designs, websites and custom web applications for small to mid-size businesses. Located in California, USA.
- http://www.evanmedia.com/

Shiro Wilde
- Interaction Designer
- http://www.freshgoods.com/projects/

Andrew Fox Interactive
- Design, usability and consultancy. Located in the United Kingdom.
- http://www.andrewfox.co.uk/

Nat Bobbitt's Laboratories
- Research and IT consulting expertise in the assessment of information systems for: ERP, CRM, CMS, DBMS. Located in Colorado, USA.
- http://www.nabslab.com/

Quakenbush Design
- Interface Design consultation for browser-based and traditional software as well as interactiveTV.
- http://www.q-design.com/

Reynolds, Louis
- Information architect and GUI consultant, specializing in information architecture, user testing, user experience, and GUI design. Located in New Jersey, USA.
- http://www.louisreynolds.com/

Aptima, Inc.
- Providing innovative research and applied design for government, industry, medical, and transportation fields. Locations in Washington DC and Massachusetts, USA.
- http://www.aptima.com/

The Communication Studio LLC
- Seasoned interaction designer: documentation, graphics, wireframe models, best practices & information architecture. A unique combination of business understanding, technical acumen, creative talent and strategic insight. Experienced in transactional
- http://www.jcvtcs.com/index.html

Acernus
- Provides usability services as well as site design and site creation services for web based companies.
- http://www.acernus.com

Eleven Consulting
- Helps companies determine product strengths and weaknesses, and gives specific, blueprint-level guidance on how they can be improved. Located in California, USA.
- http://www.elevenconsulting.com/

Reuten
- Offering information architecture, user experience and usability evaluation services. Located in Melbourne, Australia.
- http://www.reuten.com.au/

Catalyst Group Design
- Usability and User Interface Designers. Located in New York, USA.
- http://www.catalystgroupdesign.com/

Gothelf, Jeff
- Representation of the disciplines of information architecture, business analysis and usability, as well as contact information and a resume. Located in Massachusetts, USA.
- http://www.jeffgothelf.com

mProver
- Website usability reports and email support. Located in New York, USA.
- http://mprover.com/

Ferguson, Louise
- Consulting services to research, design, and evaluate interactive products. Specialist in medical usability, wireless systems and complex collaborative environments. Located in the UK.
- http://www.louiseferguson.com/

Usability Partners
- Independent usability and user-centred design consultancy, based in Stockholm, Sweden.
- http://www.usabilitypartners.se/

The TerraNova Group
- Specializing in user interface design, ethnography, usability evaluations, and user support systems. Located in Georgia, USA.
- http://www.terranova.tv/

The Hirsch Group
- Specializing in the conceptualization, design, development, evaluation, review and assessment of human-computer interfaces, especially web-based applications. Located in California, USA.
- http://www.thehirschgroup.com/

Nuno Design
- Offering user-centered interface design, auditing, and prototyping solutions for online and MS Windows applications. Located in Ireland.
- http://www.nuno.ie/

Crystal Point Consulting
- Helps businesses sharpen their websites. Provider of website analysis, reality testing, training seminars, and consulting services. Located in Illinois, USA.
- http://www.crystalpointconsulting.com/

NetRaker Corporation
- Provides an online suite of website evaluation tools to help businesses understand and manage customer intentions, attitudes, and behavior. Headquartered in California, USA.
- http://www.netraker.com/

Tec-Ed, Inc.
- Customer research, information architecture and design, and usability evaluation of technology products and websites. Offices in Michigan, California, and New York, USA.
- http://www.teced.com/

NerveCentral
- A web usability and solutions consultancy, offering user-centered ergonomic design and web development. Located in the UK.
- http://nervecentral.com

Interacta Design Oy
- Specializes in goal-based user interface design and field studies to find out the users' goals. Provides usability assessment, e.g. expert reviews and usability testing. Located in Finland.
- http://www.interacta.fi/

Pure Interface
- User interface design, usability testing and research to improve user experience for websites, software, and other products. Locate in the United Kingdom.
- http://www.pureinterface.com/

ThoughtCap
- Internet consultancy committed to helping Global 2000 clients leverage customer experience as a competitive advantage and driver of profits. Located in New York City.
- http://www.thoughtcap.com/

Software Human Factors
- Provides a wide range of usability consulting services including interface design, user testing, focus groups, heuristic evaluations and onsite training.
- http://www.softwarehumanfactors.com

Siteworkz Consulting
- Provides services in Web Design, Information Architecture, specializing in web usability. Located in Canada.
- http://siteworkz.com

Tmtm
- Offers services to create meaningful digital product development and user experience. Located in London, UK.
- http://www.tmtm.co.uk

Human Interface Group
- User-centered user interface design, user documentation and training services. Belgium
- http://www.higroup.com/

Joe 10 Group
- Interface design and usability consulting firm which applies user centered design strategies to help businesses improve the user experience of their Web sites and consumer products. Located in California, USA.
- http://www.joe10.com/

Pure Usability Ltd
- Web usability and accessibility consultancy. Based in the UK.
- http://www.pureusability.co.uk

Gruden
- Provides website design and development solutions for internet, extranet, intranet, multimedia and new media projects.
- http://www.gruden.com

Amberlight Partners Ltd.
- Helps corporations achieve specific business results by providing research, and a user-centred approach to the design and use of digital technologies. Located in the United Kingdom.
- http://www.amber-light.co.uk/

Gravity7
- Award-winning web site development, user interface, user experience consulting and communication design. Includes short articles. Located in California, USA.
- http://www.gravity7.com

Black Box Media
- A website and CDROM publishing company specializing in human factors for interface design, usability and usage studies, navigation and information architecture - directly for clients or through larger companies. Located in Canada.
- http://www.black-box-media.com

Truth In Design
- Consultants who design user experience in the shape of graphical user interfaces on the internet and in the wireless world. Located in California, USA.
- http://www.truthindesign.com

Flash 99% Good
- Usability for Flash. Promotes mainly a book, and includes tips, tutorial, and links.
- http://www.flash99good.com/

Maskery
- Offers user centred research and design services, specializing in concept design, usability, accessibility product evaluations, and training. Located in Ottawa, Canada.
- http://www.maskery.ca

Snyder Consulting
- Usability and prototyping consultant focused on helping customers recognize, prioritize, and solve usability problems. Located in New Hampshire, USA.
- http://www.snyderconsulting.net/

Usability Sciences Corporation
- Provider of usability testing and research for websites, consumer electronics, software and hardware products. Located in Texas, USA.
- http://www.usabilitysciences.com/

Bohmann Usability
- User experience consulting. Including articles and news about Web usability. From Denmark.
- http://www.bohmann.dk/

User Insight
- Provider of user experience services utilizing usability testing, focus groups, market research, training and documentation. Located in California, Georgia, and Illinois, USA.
- http://www.userinsight.com

Zanzara User Experience
- Offers usability testing, UI design and customer research services. Located in Washington, USA.
- http://www.zanzara.com

Enervision Media
- Provides analysis and designs interactive systems and interfaces for usability across all technology platforms. Located in New York, USA.
- http://www.enervisionmedia.com

Sotopia
- Usability consultant specialized in user centered design, including computer interaction, and usability engineering. Located in Rotterdam, Netherlands.
- http://www.sotopia.com/

Preston G Smalley
- Offers services in interaction design and software engineering. Located in California, USA.
- http://www.prestonsmalley.com/

Two Rivers Consulting Corporation
- A consulting firm in Massachusetts.
- http://www.tworivers.com/

Sage Consulting
- Silicon Valley based computer human interaction consultancy focusing on practical usability testing & interface design. Located in California, USA.
- http://www.sage-research.com/

Anderson, Richard I.
- Provides guidance in collaborative, user-centered design, ethnographic research, and multidisciplinary collaboration. Located in California, USA.
- http://www.well.com/user/riander/

Emma Jane Consulting
- Offers web and interface design plus user studies.
- http://www.emmajane.com/

UsabilityOne
- Offers a range of services with a focus on user interfaces for web and non-web applications. Services available throughout the Asia Pacific. Located in Australia.
- http://www.usabilityone.com

Enflexion
- Australia-based consulting group specialising in eBusiness usability and accessibility.
- http://www.enflexion.com.au/

Instrata
- Offers services to study user behaviour and apply results to create functional and usable user interfaces. Located in the UK.
- http://www.instrata.co.uk/

Performance Research and Design
- Offers user-centred design services for product development, including usability testing, survey research, user-centered design and focus groups. Located in New York, USA.
- http://www.prad.com/