Editions | URL Shortener

URLShortener follows an open-core model. The Community Edition is a complete, production-ready URL shortener under the EUPL-1.2 — links, redirects, statistics, users and roles, REST API, import and export. Nothing is time-limited, nothing phones home, and nothing is disabled to sell you an upgrade.

The Enterprise Edition is an optional plug-in layer on top of it. It does not fork, patch, or replace the community code — it plugs into published extension points at runtime.

Open source

Community Edition

The complete shortener. Self-hosted, EUPL-1.2, free forever.

Links, custom aliases, expiration, redirects
Click statistics with device, referrer and bot detection
Users, roles and permissions
REST API, Java client SDK, Vaadin admin UI
Bulk create, import and export

EUPL-1.2 · Maven Central · GitHub

★ Commercial

Enterprise Edition

Optional plug-ins for teams that need campaign management, AI access and audit exports.

Campaigns, tags and placement labels
MCP server for AI agents
Command-line client
Audit export
Commercial license and support by jSentinel Ltd

Commercial license · private registry

How the two fit together

Enterprise features register themselves through Java’s ServiceLoader at startup. The community modules publish two extension seams — one for the REST server, one for the Vaadin UI — and the plug-in jars simply sit on the classpath.

flowchart TB
  subgraph CE["Community Edition · EUPL-1.2"]
    core["core
domain · DTOs · validation"]
    server["server
REST API · redirects"]
    ui["ui
Vaadin admin"]
    client["client
Java SDK"]
  end
  subgraph SPI["Plug-in seams (published SPI)"]
    hspi["HandlerContribution
ServerContext · lifecycle hooks"]
    fspi["FeatureContribution
routes · menu · form sections"]
  end
  subgraph EE["Enterprise Edition · commercial"]
    lm["link-meta
campaigns · tags · labels"]
    ae["audit-export"]
    mcp["MCP server"]
    cli["CLI"]
  end
  server --- hspi
  ui --- fspi
  hspi -.plugs into.- lm
  fspi -.plugs into.- lm
  hspi -.plugs into.- ae
  fspi -.plugs into.- ae

What this means in practice

No fork, no patched build. Community sources are never modified for a commercial feature. A build-time boundary test fails the build if community code ever references an enterprise package.
Graceful degradation. Without a license the plug-in endpoints answer 403 license required and their menu entries and views disappear. The community application keeps running unchanged.
Your data stays yours. Data written by an enterprise feature stays in your store. If a license lapses, that data lies dormant — and comes back the moment a license is present again. Nothing is deleted and nothing is held hostage.
One version number. Both editions are built and released from the same version, so a community upgrade never leaves the plug-ins behind.