Depending on the package you will find the licensed Pilz ROS packages under Apache License Version 2.0 or GNU Lesser General Public License version 3 (LGPL).
You can find more information about the Pilz ROS package on ROS Wiki:
Robotics
What licences do I need to use the Pilz ROS packages?
Contact
Pilz lndia Pvt Ltd
6th Floor, ‘Cybernex’, Shankar Seth Road, Swargate,
Pune - 411037
India
Telephone: +91 20 49221100/101/102
E-Mail: info@pilz.in
Technical Support
Telephone: +91 20 49221100/101/102
E-Mail: info@pilz.in