ShareX vs Lightshot

Designed as file uploader in the first place, ShareX supports overhelming amount of services for you to upload your files to and the list is expanding.

ShareX is licensed under GPL with source code available on GitHub.

You can choose what shortcut key to bind your command to, as well what host it uploads the file to.

When you enter a capture mode, the screen content is preserved as it was when you started capturing by default. However there is a special "Light" mode where the screen does not freeze.

Apart from still images, ShareX allows the user to record unlimited video with all the options available for normal image capture.

Capturing (screen, video, a window, etc.) with annotation + automation makes for some powerful workflows.
Annotation is key for research on any project size. Capturing screenshots, editing them ("annotating"), converting to a PNG, removing the background to make a transparent version, saving to google drive, creating large+med+sm sizes, uploading thumbnails, is an example of a workflow you could create. The list goes on...

You'll find the same strength & depth in features for image handling also for text, videos, other files by type, and on and on..

It has its own screen editing tool.

It is great for creating software tutorials or highlighting new features in a sales function - nothing beats a well-placed animated GIF in an email.

In spite of some drawbacks, the clean and easy to use interface is awesome.