Yes, you do need license all Qlik Sense usage/viewing, for most environments this means assigning a analyzer/professional license for everyone who is accessing the object on that web page. However, Qlik do offer cpu based licensing model where you can publish without the need of authenticating every user. I do not have the details of this licensing model, so I recommend you to reach out to your local partner (or Qlik) to get the correct information about this licencing model and pricing.
