The use of Userlike itself does not necessarily require the consent of the user. Rather, you can base the use of Userlike on your website on your legitimate interest in simple and customer-friendly communication. Please consult your data protection officer for advice on this.
For the proper function of Userlike on your website, the setting of a cookie is required, and for this you need the consent of your end users according to the current case law of the Court of Justice of the European Union.
However, as with all legal issues, the same applies here: The information provided here cannot replace legal advice in individual cases. Therefore, please speak with your legal counsel if you have questions about consent and data protection!