On our cloud infrastructure hosted by Amazon Web Services, using Amazon S3 for document storage and Amazon RDS for application data.
If you need documents to stay inside your own network, Draftable API Self-Hosted runs the same comparison engine and can be deployed on your own infrastructure.
You decide. Data you submit is retained until you remove it, and the API gives you three ways to control that:
When a deletion is processed the data becomes immediately inaccessible. Copies in encrypted backups age out automatically within 30 days.