BESSER vs Umple
BESSER
besser-pearl.orgUmple
umple.orgSide by side
| Figure | BESSER | Umple |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 0 |
| Spec score · UML Modeling Software | 9.0 (#1) | 7.3 (#18) |
| Audience | BESSER is built by a research-led team at LIST and SnT / University of Luxembourg for low-code and AI-assisted software engineering. | The site says Umple can be used in real industry systems and has also helped students learn software design in the classroom. |
| Integrations | Documented generation targets include Python, FastAPI, Django, SQLAlchemy, SQL, Java, React, PyTorch and TensorFlow. | The manual describes support for Visual Studio Code, BBEdit, Zed, Neovim, Sublime, the command line, and an Eclipse plugin that has not been maintained recently. |
| License | BESSER is open source under the MIT license. | The manual says all use of Umple and UmpleOnline is subject to the Umple MIT license. |
| Online editor | The hosted editor lets users model, generate and deploy in a browser without installing software. | UmpleOnline lets users edit models in text or diagrams, generate code, and save examples in the cloud. |
| Support | The project offers an on-page assistant without an account, email support, and GitHub bug triage weekly. | The site links to the user manual, question and help mailing lists, and GitHub issue reporting for help and problem reports. |
| What it does | BESSER is an open-source low-code platform that turns models into APIs, databases, agents and deployment artifacts. | Umple is a modeling tool and programming language family for model-oriented programming that adds abstractions such as associations, attributes, and state machines to object-oriented languages. |
Plans
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.