If you are using a Lansweeper On-prem installation you can link your On-prem installation to Lansweeper Sites at no additional cost.
The following article will prove to be helpful in linking your Lansweeper On-prem installation with Lansweeper Sites.
https://community.lansweeper.com/t5/sites/link-lansweeper-on-prem-with-lansweeper-sites/ta-p/64514