ShareThis is a technology company based in the USA that provides social media sharing and engagement tools for websites and applications. While their exact headquarters location isn't explicitly stated on their primary website, their services and past press releases suggest a US-based operation. Their core function centers around facilitating the easy sharing of content across various social media platforms and via email. This is achieved through the integration of their tools – buttons, widgets, and APIs – into client websites and apps.

ShareThis doesn't focus solely on email marketing in the sense of managing email lists and sending bulk campaigns. Instead, their email functionality is integrated within their broader social sharing platform, allowing users to share content directly through email alongside other channels like Facebook, Twitter, and LinkedIn. Users can choose to include an email option when sharing content, enabling quick and easy forwarding of articles, videos, or other digital media to friends, colleagues, or contacts. This functionality plays a supporting role within their overall mission to increase content visibility and engagement.