ShareX Alternatives for Linux
ShareX is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The most popular Linux alternative is 
Flameshot, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to ShareX and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to ShareX are 
VokoscreenNG (Free, Open Source), 
Ksnip (Free, Open Source), 
Spectacle (Free, Open Source) and 
GoFullPage (Formerly Full Page Screen Capture) (Freemium, Open Source).
- Powerful yet simple to use free and opensource screenshot software for Linux and Windows. View 24 alternatives to Flameshot
- Free • Open Source
- Windows
- Linux
I can't upload to custom server.Flameshot allows you to quickly take a screenshot, draw a couple boxes, and save it to your clipboard faster than any other software I've tried. For me, any additional UI after that point is also a dealbreaker, which flameshot doesn't have. Once you're done with your screenshot, you're done. Quick and simple.Too much clutter and many steps. ShareX is QUICKER, more lightweight. - VokscreenNG is a user friendly screencaster for Linux and Windows. View 123 alternatives to VokoscreenNG
- Ksnip is a Qt based cross-platform screenshot tool that provides many annotation features for your screenshots. View 30 alternatives to Ksnip
- Free • Open Source
- Mac
- Windows
- Linux
- Qt
bigbigboy ShareX is the best option for Windows, if you are using linux, then the best is Ksnip. Even more if you are using a qt based environment - KDE new screenshot program, replaced ksnapshot in current releases. View 192 alternatives to Spectacle
- Free • Open Source
- Linux
Its simple and included with KDE - Capture a screenshot of your current page in entirety and reliably—without requesting any extra permissions!. View 110 alternatives to GoFullPage (Formerly Full Page Screen Capture)
- Freemium • Open Source
- Mac
- Windows
- Linux
- Google Chrome
- Capture full web page screenshots in Firefox, Chrome, Opera, Pale Moon or Internet Explorer Quick screenshots and annotations!. View 110 alternatives to FireShot
- Freemium
- Windows
- Linux
- Internet Explorer
- Google Chrome
- Pale Moon
- Thunderbird
- Opera
- Firefox
- Hotshots is a screenshot tool with some editing features. View 126 alternatives to HotShots
Discontinued
The project seems no longer developed. Last version, 2.2.0, released in September 2014, can be still downloaded from SourceForge
- Free • Open Source
- Windows
- Linux
- This is a default screenshot app for Linux Deepin. View 142 alternatives to Deepin Screenshot
- The free and open source and cross platform screen sharing software. View 159 alternatives to KShare
Discontinued
According to the main developer's website this application has been discontinued. See https://arsenarsen.com/
- Free • Open Source
- Linux
Provides all the features that ShareX is famous for on Linux, OS X, and BSDCknight70 Best screenshot tool for Linux I've found. Good alternative to ShareX even on Windows. - Screenshots made simple. Capture and download screenshots without leaving Firefox. View 108 alternatives to Firefox Screenshots