> For the complete documentation index, see [llms.txt](https://docs.senmo.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.senmo.io/segment-ledger/core-concepts/ledger.md).

# Ledger

A ledger is an isolated accounting environment.

Every ledger contains its own accounts, balances, transactions, and entries. Data is never shared between ledgers, making them ideal for multi-tenant applications.

For example:

* One ledger per customer
* One ledger per business
* One ledger per merchant
* One ledger per platform
* One ledger per organization