Security
Multi-Tenant Company Data Isolation Explained
Learn why company identity, database policies, server authorization, and audit controls must work together in multi-tenant software.
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Direct answer
Multi-tenant isolation means one company's records must not become visible or writable from another company's session. It requires consistent company scope across database policies, server actions, APIs, and user permissions.
Company scope is a security boundary
A company name shown in the interface is not enough to create isolation. Every business record needs a stable tenant relationship, and every data operation must verify that relationship.
This applies to operational records such as users, tasks, leave, overtime, expenses, announcements, salary configuration, and access history.
Defense in depth
A reliable model uses more than one enforcement layer.
- Database row-level policies restrict which tenant rows a valid identity can access.
- Server actions and APIs verify company membership and the requested permission.
- Role permissions and per-user overrides restrict capabilities within the tenant.
- Private routes remain excluded from search and AI crawling.
- Audit records help investigate access and changes without becoming a substitute for prevention.
Public product information remains separate
Marketing, feature, industry, solution, and educational pages can be public and crawlable. Authenticated company data must remain behind authorization and must not be included in public sitemaps, structured data, or AI discovery files.
This guide describes an architecture principle and does not claim a security certification or guarantee that no vulnerability can exist.
Key facts
- Tenant isolation must be enforced below the interface layer.
- Database scope and application permissions solve different parts of the problem.
- Public GEO content must never expose authenticated business records.