A perpetual license is a type of software license that allows the buyer to use a specific version of the software indefinitely. Once purchased, the user has the right to use the software without any time limitations, although they may need to pay for updates or support services separately. This licensing model contrasts with subscription-based licenses, where users pay a recurring fee to access the software. With a perpetual license, users typically make a one-time payment, which can be more cost-effective in the long run for those who do not require frequent updates or new features.