WhoSendsWhat

WhoSendsWhat is an email discovery and campaign research platform designed to help brands find inspiration for their marketing. Its searchable database includes more than 200,000 emails gathered from over 10,000 websites, offering a library of campaign examples across industries. Users can explore onboarding emails, newsletters, drip campaigns, re-engagement sequences, repeat campaigns, and other customer communications, then save examples for future reference.

The platform supports campaign planning and competitive research by letting users follow websites, compare email sequences, examine historical activity by domain, and track industry trends. Search filters include email subject, industry, and technology, with additional ways to explore campaign features such as emojis and GIFs. WhoSendsWhat is intended to help marketers study design, messaging, and sending patterns, curate ideas, and adapt useful approaches to fit their own brands. Rather than relying solely on trial and error, users can draw on established campaigns to inform content and improve the customer experience. The service also offers access options including sign-up and beta access requests.