Boston Human Factors offer UX design and user research services to companies looking to improve their digital products. Their designers have a background in Human Factors. They base their design decisions on Human Factors - the universal principles all humans share.
Fluidangle is a tech startup based in San Francisco, California provide a full suite of services for digital product development ranging from design, development, digital marketing, and management are passionate about helping entrepreneurs, small and medium businesses and cater to every industry.
Iteration Group is a "boutique" Product / UI / UX consulting firm. They work closely with large enterprise companies, consumer brands, and well-capitalized startups. They design and build brand-new web sites, apps, and users experiences from scratch. They also redesign products that are used by tens and hundreds of thousands of people each day.