What are the Open5GS license terms?

Open5GS is licensed under the GNU Affero General Public License (AGPL), Version 3.0.

Are there any companies providing commercial support for Open5GS?

sysmocom is providing commercial services around Open5GS, including support, development, consulting, training and system integration.

Please contact Harald Welte <sales@sysmocom.de> for any related inquiries.

Are there any success stories about Open5GS deployments?

See https://github.com/acetcom/open5gs/issues/360