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Quemsi
The privacy policy gives Quemsi GmbH's postal address as Leopoldstraße 24, 12305 Berlin, Germany.
What it is
Quemsi is a hybrid tool for backing up and restoring databases through a web interface. Users can organize snapshots with tags, review them on a timeline, and restore with one click. It supports MySQL, PostgreSQL, SQL Server, and MongoDB. Backup and restore flows can include custom tasks, such as stopping services or running scripts, and backups can be kept in AWS S3, Azure Blob, or local drives under the user's control. The agent performs backup and restore operations within the user's infrastructure; the cloud service handles metadata rather than database content. Quemsi describes the agent as open source and says users can inspect, modify, or build it from source. Its architecture uses TLS 1.3 for agent-to-cloud communication, certificate-based mutual TLS for agents, and SHA-256 checksums to check 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 has no time limit and includes unlimited databases, environments, and flows for one user, with community support. Example REST endpoints are listed, but full API documentation is described as forthcoming.
For and against
For
- Supports four named database systems
- Backups can go to cloud storage or local drives
- Custom flows can stop services or run scripts
- Free Solo plan has unlimited databases and flows
- Open-source agent can be audited or modified
Against
- Solo plan is limited to a single user
- Solo support is community-based
- Full API documentation is not yet available
The verdict
Quemsi pairs local-infrastructure operations with cloud-managed metadata and gives users control over backup destinations. Its free Solo plan covers one user, while the listed Enterprise features are aimed at organizational needs.
Who it suits
Quemsi's Solo plan is described for individual developers who need database backup and restore flows. Companies can consider Enterprise, which lists detailed authorization, CI/CD integration, priority support, and additional organizational features.
Plans and prices
Solo
Unlimited databases · Unlimited environments · Unlimited flows · Core functionality
Read 21 Oct 2026 · quemsi.com
Enterprise
Everything in Solo · Detailed authorization · CI/CD integration · Extra functionality
Read 21 Oct 2026 · quemsi.com
On the record
- Agent architecture
- A locally deployed agent performs database operations while the cloud handles metadata, authentication and coordination.quemsi.com · read 21 Oct 2026
- Agent platforms
- The agent is available for Windows, Linux, and macOS, and can also run as a Java JAR or Docker container.quemsi.com · read 9 Oct 2026
- API
- The architecture page lists example REST endpoints for executing flows and querying agents and flow executions, and says full API documentation will be provided in the future.quemsi.com · read 9 Oct 2026
- API authentication
- Company API tokens use qsk-prefixed secrets with selectable scopes and optional agent binding.quemsi.com · read 21 Oct 2026
- API limitation
- The architecture page says complete API documentation is planned for a future release.quemsi.com · read 21 Oct 2026
- Audience
- The Solo plan is described as being for individual developers, while Enterprise is described as being for companies.quemsi.com · read 9 Oct 2026
- Automation
- Recurring flows can be scheduled with timers and triggered through the UI, CLI or API.quemsi.com · read 21 Oct 2026
- Backup flow model
- Backup flows require a source and destination, with optional processing steps such as Zip.quemsi.com · read 21 Oct 2026
- CI integration
- The documented API and CLI support snapshot-before-deploy and restore-before-tests workflows.quemsi.com · read 21 Oct 2026
- CLI
- Quemsi publishes a CLI for Linux, Windows and Java 21 JAR execution, with --wait enabled by default.quemsi.com · read 21 Oct 2026
- Cross-environment sharing
- Snapshots can be shared between development, testing and production environments while remaining in customer-controlled infrastructure.quemsi.com · read 21 Oct 2026
- Databases
- The product supports MySQL, PostgreSQL, SQL Server, and MongoDB.quemsi.com · read 9 Oct 2026
- Data residency
- Quemsi states that database contents and backups remain in the customer's environment and only metadata is sent to the cloud.quemsi.com · read 21 Oct 2026
- Demo
- The demo supplies preconfigured databases and flows, requires no installation or credit card, and resets every day at midnight.quemsi.com · read 21 Oct 2026
- Deployment options
- Agents can run as Windows, Linux or macOS services, standalone processes, Docker containers or Java JARs.quemsi.com · read 21 Oct 2026
- Developer stack
- The repository describes the agent as a Spring Boot and GraalVM project that can be built by users.github.com · read 21 Oct 2026
- Flow customization
- Backup and restore flows can include custom workflows such as stopping services and running scripts.quemsi.com · read 9 Oct 2026
- Free usage
- The site says the Solo plan has no time limit and includes core features without restriction.quemsi.com · read 9 Oct 2026
