A text-based tool that is excellent for developers who want to "code" their diagrams.
This was an open-source project under the GPL license.If you need a modeling tool that is 100% free forever with no watermarks, you can still download the original V1. While it lacks modern features like SysML or AWS architecture icons, it handles core UML (Class, Sequence, State diagrams) perfectly. 3. StarUML Official Pricing & Discounts
This is commercial software developed by MKLabs. Staruml License Key Free--------
Simple one-time payment, use forever. No monthly or annual fees. One-time payment for each device, use it forever. No hidden fees, UML diagramming software which is free for students?
StarUML doesn’t technically "lock you out" after its 30-day trial expires. According to the official StarUML download page , you can start with a 30-day free trial. A text-based tool that is excellent for developers
An open-source UML modeling tool that has been around for years.
If you're buying for a small team, the price drops significantly (e.g., $99 for 100+ devices). 4. Why You Should Avoid "Free Key" Sites No monthly or annual fees
For professional or corporate use, using an unlicensed key can lead to audits and fines for your company. Top Free Alternatives to StarUML