Medusa vs Quemsi

Medusa is a command-line backup system for Apache Cassandra that runs on Linux in a self-hosted deployment. It supports full and differential backups, single-node backup and restore, and cluster-wide restores in place or to a remote location. Backup destinations include local storage, Google Cloud Storage, Azure Blob Storage, AWS S3, and compatible S3 services. It supports clusters using either single tokens or vnodes. Its verify command checks backup completion, manifest and file presence, and file hashes; MD5 checks can be enabled, while file size is checked by default. Configuration documentation covers client SSL settings and S3 server-side encryption with KMS or customer-provided keys. Retention settings can purge backups by age or count. Installation instructions cover pip and Debian packages, including offline installation, and describe installing Medusa on each Cassandra node. It requires Python 3.9 or newer and is licensed under Apache-2.0. A stated constraint is that it does not support Cassandra deployments with multiple data-folder directories.

Quemsi is a hybrid tool for database backup and restore, with a web UI for tagged snapshots, timeline history, and one-click restoration. It supports MySQL, PostgreSQL, SQL Server, and MongoDB. Backup and restore flows can include custom steps such as stopping services or running scripts, and backups can go to AWS S3, Azure Blob, or local drives under the user's control. Its agent runs operations inside the user's infrastructure, while the cloud service handles metadata rather than database content. The agent is open source and can be audited, modified, or built from source. Agent-to-cloud communication uses TLS 1.3, agents use certificate-based mutual TLS, and SHA-256 checksums verify backup integrity. Agents are available for Windows, Linux, and macOS, and can also run as a Java JAR or Docker container. The free Solo plan costs nothing and includes unlimited databases, environments, and flows for one user, with community support.