Zintro

Zintro is an expert network headquartered in Boston, MA. The firm operates a DIY Marketplace, along with regular expert network recruiting services. According to the website, Zintro has a database of 150,000 curated experts based across the entire world.

It also offers its clients the service of conducting surveys and polls experts/industry participants for market research, diligence, and projects.

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Liahnson & Company

Liahnson & Company is an expert network headquartered in Seoul, South Korea. It also provides expert surveys.

Maven Research

Maven Research is an expert network focused on serving corporate customers, offering both expert calls and longer projects. It also provides electronic survey services to its clients.