The difference between commercial software and closed software is that the first often allows for end-user customization since it is open-source software while the second does not, leaving the developer to make changes at their discretion.
A perpetual software license is software that you pay a one-time upfront fee and keep the software. Additional fees are annual and include support and maintenances.
Free software is not the same as open-source software as they have different values. Free software means people’s freedom in what they do with the software.
Your choice of an Open-Source license will depend on your intended use, your legal jurisdiction and the laws applying to it, and the level of risk you prefer.
Perpetual license gives you the liberty to usage with a one-off payment while subscription license gives you right to usage for a monthly premium.
SaaS pricing models let customers pay for online apps and software on a monthly or annual basis.
The difference between Free and Open Source Licenses is the distribution of the software. Free software licenses originate from the Free Software Foundation which imposes restrictions on the modifications you can make to the software code.
Copyleft is an open-source software license that allows users to modify and reuse intellectual property without restrictions.
A software license is a legal document that guides software users on how to use and distribute software without violating ownership, distribution and control rights.
A permissive software license is a free software license that has minimal constraints on how you can use the software.