Quemsi vs WAL-G

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.

WAL-G is a free, open-source archival and restoration tool for databases in cloud environments. It supports continuous backups and point-in-time recovery, with documented support for PostgreSQL, MySQL, MariaDB, and MS SQL Server; MongoDB and Redis are marked beta. Other listed database targets include Greenplum, Cloudberry, FoundationDB, and ETCD. Compression options are LZ4, LZMA, ZSTD, and Brotli, using multiple processors. PostgreSQL users can take non-exclusive base backups. Operators configure backup storage and interact with it through storage tools commands. Configuration accepts environment variables or JSON, YAML, and envfile formats. Encryption can use libsodium, OpenPGP, or Yandex Cloud KMS, but is disabled by default; envelope PGP configuration currently supports only Yandex Cloud KMS. Metrics can be sent best-effort over UDP to statsd or statsd_exporter. WAL-G runs on Linux, macOS, and Windows builds.