Duplicati is a free, open-source backup client that securely stores encrypted, incremental, and compressed backups on local, cloud, and remote file servers. Its key features include strong AES-256 encryption and efficient handling of bandwidth and storage usage through incremental backups. By supporting the S3 API, Duplicati integrates seamlessly with Impossible Cloud, allowing users to leverage a secure, GDPR-compliant European object storage for reliable and private data protection without vendor lock-in, making enterprise-grade security accessible to everyone.