Here's how to add your colleague to Leadfeeder:
NOTE: Please notice that only users with admin privileges can add new users.
STEP 1: Click on your name in the top right corner and choose Your settings from the menu.
STEP 2: Click on the tab Company and Users at the bottom of the left side menu.
STEP 3: Click Add new user. Fill the field Email and choose the wanted user level. Click then Invite users.