Crux organizes everything in a simple nesting structure. From the outside in:
company → workspace → project → suite → case
Company
Workspace
Project
Test suite
Test case
Run
passed
Company (organization) — your top-level account. Everything your team does lives inside one company. This is where billing and company-wide settings live.
Workspace — a space inside your company for a team, product, or area of work. A company can hold several workspaces. Members and branding are managed per workspace.
Project — a unit of work inside a workspace, usually mapping to one application or service you're testing. A workspace can hold many projects.
Test suite — a folder for grouping related test cases inside a project. Suites can be nested inside other suites, so you can build a tree that mirrors how you think about your product (for example: Checkout › Payments › Refunds).
Test case — a single thing to test, with a title, steps, and an expected result. Test cases live inside a project and can be filed under a suite.
Run — one execution of a set of tests. A run can be done by a person (a manual run) or sent in automatically by your test framework (an automated run). Each run contains a run result for every test case it covered, showing whether it passed, failed, was skipped, and so on.