ShareX is described as 'Free and open-source tool for screen capture and recording; enables file uploads, annotation, dark mode, 4K support, and customizable themes' and is a leading screenshot capture tool in the photos & graphics category. There are more than 100 alternatives to ShareX for a variety of platforms, including Windows, Mac, Web-based, Linux and Google Chrome apps. The best ShareX alternative is Flameshot, which is both free and Open Source. Other great apps like ShareX are Greenshot, Lightshot, Snipping Tool and ScreenToGif.
Flameshot is a free, open-source screenshot tool that is cross-platform compatible, offering customization, editing features, CLI scripting, and direct Imgur uploads for seamless sharing. It provides an intuitive user experience through features like area selection, annotations, and saving options.
Lightweight screenshot tool offering OCR, exports to Office apps and online storage, integration with external commands, supporting 32 languages and minimal space requirement.
Captures selectable screen regions for Windows and Mac, offers instant uploading, quick editing, and sharing through short URLs, supports saving locally, annotating, clipboard copying, browser add-ons, upload history access, and operates without heavy system use.
Snipping Tool is a screen capture utility that allows users to take screenshots of specific objects or full screens, annotate them, and save or share the captured images or videos.
This tool allows you to record a selected area of your screen and save as a animated gif.
SimpleScreenRecorder is a Linux screen recorder that supports X11 and OpenGL. It is easy to use, feature-rich, and has a Qt-based graphical user interface. It can record the entire screen or part of it, or record OpenGL applications directly.
Ksnip is a Qt based cross-platform screenshot tool that provides many annotation features for your screenshots.
Provides versatile screen capture options, built-in image annotation, color picking and palette, precision measurement tools like ruler and protractor, hotkey customization, clipboard and multi-format support, simple tray access, sharing, and portable operation.
Open source screen recorder and annotation tool for Chromium browsers supporting local and offline storage, screen, tab, or camera capture, audio recording, cursor and click highlights, blur, zoom, countdowns, and UI controls. Source code available on GitHub.
Advanced screen capture and recording tool enabling image or video captures directly from your screen. Includes editing features like callouts, transparency, and effects to enhance visuals. Organize and easily share creations through documents, presentations, or favorite applications.
A powerful, lightweight, yet full-featured screen capture tool that allows you to easily capture and annotate anything on the screen including windows, objects, menus, full screen, rectangular/freehand regions and even scrolling windows/web pages.
VokoscreenNG is a user friendly screencaster for Linux and Windows. It is a continuation of the now discontinued Vokoscreen project that has been totally rewritten from scratch using Qt and GStreamer.
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In my experience, Flameshot has worked far quicker than ShareX. While ShareX does have more features, Flameshot works well as an alternative if you only require a good screenshot tool.