BESSER vs Modelio
BESSER
besser-pearl.orgModelio
modelio.orgSide by side
| Figure | BESSER | Modelio |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 3 |
| Spec score · UML Modeling Software | 9.0 (#1) | 7.5 (#17) |
| Support | The project offers an on-page assistant without an account, email support, and GitHub bug triage weekly. | Technical support is offered to customers who purchase it with a solution and can assist by email or phone with migration, repository recovery, licensing, and upgrades. |
Plans
Modelio
- Modelio Open SourceFree
- Modelio SaaS PremiumPriced on request
- Modelio SaaS StandardPriced on request
In their own words
BESSER
BESSER is an open-source low-code platform for building smart applications by modeling once and generating APIs, databases, agents, and deployments. Its 15+ generators cover databases, REST APIs, web apps, AI agents, and deployment manifests. Built-in modeling includes class diagrams, state machines, object diagrams, agents, and deployment specifications. The GUI Creator deterministically generates complete React frontends from platform-independent GUI models, and AI-assisted modeling supports software with embedded AI components. BESSER connects through an MCP server to Claude Desktop, Cursor, and other MCP-aware clients; BESSER Skills also integrate with Claude Code, Cursor, and Copilot for model and code-generation workflows. Generated Docker components can be used to deploy a running application from a model. The project is MIT-licensed and free, with no freemium tier or hidden fees. It runs on the web, Linux, macOS, and Windows. The Python package installs with pip, and the full codebase can run locally for extensions and generators. It is tested on Python 3.10, 3.11, and 3.12; Python 3.13 is not supported yet. Support includes an on-page assistant, email, and weekly GitHub bug triage.
Modelio
Modelio is a modeling environment for enterprise architecture, process modeling, software development, and systems engineering. It supports UML, BPMN, ArchiMate, SysML, and TOGAF, with consistency checks to help identify issues across models. BPMN work can be integrated with other supported standards, including UML. The free Modelio Open Source plan provides the modeling environment, though downloadable extensions may require separate licenses. Modelio 5.4.1 adds ArchiMate 3.2 support, diagram thumbnails, and diagram traceability. The desktop app runs on Windows and Linux, with listed packages for Windows 8.1/10/11 and several Linux distributions. XMI is available for import and export, and diagrams can be exported to HTML. Extensibility includes a Java API, Jython macros, extension modules, and Eclipse integration.