Terms of use

Version 2026-10-30

Research release

CivilOS, CulvertLab and BidLedger are a research release from Atlas. Calculations are deterministic and show their basis, but they have not been adopted or validated by a licensed professional engineer for your project. You remain responsible for checking every result and for any design you seal, submit or build.

Your account and your work

Keep your password and two-factor codes to yourself. Your projects and data belong to you or your organization. We use them only to run the service for you, and we do not sell them.

Free for now

Accounts are free while the service is in this release. If we introduce paid plans we will tell you before anything is charged, and nothing you made will be deleted because of a plan change.

Acceptable use

Don't try to get into other organizations' data, overload the service, or use it to break the law.

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