Acceptable Use Policy.

Last updated 2026-09-25. Questions: support@stackd.icu.

stackd is for learning. You agree to:

• Use challenges, labs and live instances only within the platform and for your own training.
• Never use techniques, tooling or infrastructure from stackd against systems, networks, accounts or people you are not explicitly authorised to test.
• Not attempt to break out of the isolation of arena instances, attack our infrastructure, or interfere with other users.
• Not share, resell or publicly post paid content, flags or writeups.
• Not create multiple or automated accounts, or manipulate the leaderboard.

Live lab instances are sandboxed (gVisor, no internet egress) and are monitored for abuse. Violations may lead to suspension and, where appropriate, reporting to the relevant authorities.