[jameslk]

Isn't trackerless astrophotography one of the main use cases for software that can do stacking like Siril [0] and similar tools [1] out there?

0. https://siril.org/

1. https://www.reddit.com/r/AskAstrophotography/comments/1b7fz3...

[bhouston]

Siril is for integrating a lot of images together that are tracked and then removing the background. While you may be able to use it untracked it is primarily for tracked images.

[polishdude20]

Yes those software do align the images based on the stars so it can compensate for movement.