
The Nik Collection plug-ins are sold as a single unit. You can’t buy them separately, but you do use them separately. And although they are typically used as plug-ins for programs like Lightroom Classic and Photoshop, they also work as standalone programs and external editors for other programs, like Capture One. If you like to shoot raw, though, you will need a ‘host’ program to do your raw conversions before sending processed images to the Nik plug-ins for editing.
So even though Nik Collection is usually described as a plug-in suite, it actually offers a wide variety of workflows. This, and its huge creative range, make it one of the best photo-editing software applications for photographers.