Self-hosted E2E encryption via Matrix might be one way: https://matrix.org/docs/matrix-concepts/end-to-end-encryption/ https://matrix.org/docs/matrix-concepts/e

Self-hosted E2E encryption via Matrix might be one way: https://matrix.org/docs/matrix-concepts/end-to-end-encryption/ https://matrix.org/docs/matrix-concepts/end-to-end-encryptio...