_hsenc?HubSpot's tracking family: _hsenc is an encrypted token identifying you as the specific email recipient, _hsmi names the email, and hsa_ tags mark ad clicks.
This page covers the family: _hsenc (encrypted recipient token), _hsmi (which marketing email), hsCtaTracking (which button), and the hsa_cam, hsa_grp, hsa_ad ad-click set.
HubSpot is a marketing platform used by hundreds of thousands of companies, and its links are instantly recognizable by the underscore-prefixed tokens. _hsenc is a long encrypted value that resolves, inside HubSpot, to the exact contact record that received the email: you. _hsmi identifies which email it was.
Click a link carrying them and HubSpot logs the click on your contact timeline, feeds it to lead scoring, and can trigger automated follow-up. The destination page, usually the customer's own site running HubSpot's tracking code, connects your visit to that same record.
The hsa_* parameters are a separate branch: campaign, ad group and ad identifiers HubSpot appends to paid ad clicks it manages.
Yes. Pages load identically without the entire family. The sender's click log and lead-scoring pipeline lose the event, which is rather the point.
Rather's Link Shortener strips _hsenc and hundreds of parameters like it, right in the address bar and in everything you copy or share. Free, open source, no account, no data collection, and the page you are on never breaks: the cleanup happens after the site has already loaded.