How Exogi handles multi-deanery data isolation

Why data isolation matters

When multiple organisations use the same platform, data isolation is critical. Each deanery, school of anaesthesia, or training programme needs confidence that their data is private — visible only to their authorised users, and never accessible to another organisation.

This isn’t just a nice-to-have. For NHS-adjacent organisations handling trainee data, it’s an expectation.

How most platforms handle it

Many multi-tenant SaaS platforms store all customers’ data in the same database, using application-level logic to filter what each user sees. This works, but it means:

• A bug in the filtering logic could expose data across organisations
• Database administrators have access to everyone’s data
• A security breach in one account could theoretically affect others

How Exogi handles it

Exogi uses a fully isolated architecture. Each deanery operates in its own environment with its own database. There is no shared data store between organisations.

This means:

• No cross-contamination: One deanery’s data is physically separate from another’s
• No shared access: Database-level isolation, not just application-level filtering
• Independent backups: Each organisation’s data is backed up independently
• Clean data export: When you export your data, you get everything — and only your data

The trade-off

Full isolation is more complex to build and operate than shared-database multi-tenancy. It requires more infrastructure and more careful deployment processes. We believe the trade-off is worth it for the level of data governance that healthcare education demands.

In practice

When a deanery signs up for Exogi, their environment is provisioned as a completely separate instance. Users within that deanery can manage programmes, trainees, sessions, and reports — all within their isolated environment. No other organisation can see, access, or interact with their data.

For deanery leads considering Exogi, this is one of the most important architectural decisions we’ve made — and one we’re happy to discuss in detail. Contact us at hello@exogi.co.uk.