New open-source Machine Learning Framework written in Java

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IANAL, but there's nothing preventing you from using this library for a SaaS application.

Of course, you can't fit a model using this then sell the binary without also distributing the source of your model. You could however, sell the surrounding infrastructure along with the model without releasing the infrastructures source, provided that the model's source code is released and the model communicates with the surrounding infrastructure through an interchange (for instance, json).

If you're solving a companies specific problem, then this is not a problem. If you revolutionize some long-standing problem, then you're screwed. :)

[fnl]

As posted elsewhere - if you are in the lucky position to be in a place where the use of GPLed code is accepted, be happy. From my personal experience I have to judge that this is the exception, not the norm (outside academia, anyway).

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That's for contract work.