Great question! Outline does not support end-to-end encryption (E2EE) or client-side encryption, even in the self-hosted version. The encryption it uses — TLS for data in transit and AES-256 for data at rest — applies at the server level, meaning the server (whether cloud-hosted or self-hosted) still has access to the unencrypted document contents. So, while data is securely transmitted and stored, it is not encrypted in a way that prevents server access, which is what true E2EE or client-side encryption would provide.