SSI: Market Research, Survey Questions, Data Collection ...
https://www.surveysampling.com/
Survey Sampling International
Survey Sampling International, SSI, is the trusted global leader in survey and research solutions for market research firms, B2B and B2C companies.
Number has called multiple times. Does not leave a message and hangs up if I answer. One time I stayed on the line and they hung up after about 45 seconds - I had spoken.