Peanut Labs is an innovator in market research that provides access to a global sample of over 15 million diverse and engaged online panelists. It builds relationships with publishers and partners to attract high traffic. Peanut Labs uses a panel sample approach where detailed profiles of panelists are maintained with their demographics and survey behaviors. This allows targeting specific groups of pre-identified panelists for surveys and evaluating their data quality over time. In contrast, river sampling relies on banner ads to recruit unknown respondents without profiles for one-time surveys. Peanut Labs enhances panel sampling by not using email invitations and instead notifying targeted panelists of available surveys when they login to their survey site.