It's only source available: it is licensed under the BSL which is not a free software license. Use of the term open source is not appropriate.
A friend works there and tried to recruit me; I declined because of this sort of fake open source charlatan nonsense.
The software in TFA (VPNCloud) is indeed free software/open source: it is licensed under the GPL, just like Linux.
So, older versions are indeed open source, and new versions will eventually be so as well.
What’s your objection to the BSL? It seems like a great way to provide ongoing funding to open source, and guarantees popular commercially developed software won’t end up as abandonware.
It also makes it hard for a fork to develop traction, as a fork would have to start at a much older version that is Open Source, or the ecosystem would have to forgo the opportunity for third-party hosting services to support it.
The freedom to fork is an essential freedom. Without it, I would not feel comfortable contributing to the project. Nor would I feel comfortable basing critical business infrastructure on it.
Others may be fine with proprietary source-available software, and that is fine for them, but I strongly prefer Open Source for my needs, especially for core infrastructure.
> The Business Source License (this document, or the "License") is not an Open Source license.
https://github.com/zerotier/ZeroTierOne/blob/a7f652781faedfb...
Is the concern simply that governments can only use it to help people?
