Discord

You can search for these on Discord. Examples:

• OSINTOPIA (FR)

• Hack This Site

• Hackfest.ca (mainly FR)

• Red Team Village​

• ​SIMPLY CYBER

• HacktBack (FR)

• PolyCyber (FR)​​​​

• MontréHack (mainly FR)

For Bug Bounty:

• Bug bounty HackerOne

• Bugcrowd Hacking Community

An exhaustive list of cybersecurity related servers.​