ShareX vs Greenshot is a common pick when Windows users want a free screenshot tool with annotation. ShareX is a free, open source capture and upload suite for Windows. Greenshot is a free, open source capture and annotate tool for Windows (with a separate Mac app). Algenius is a plug-and-play daily activity logging and screenshot app for Windows and Linux, so this page adds a third option when your team needs Linux, AI text tools, or daily work reports.
The real problem: two great free tools, one incomplete workflow
Both ShareX and Greenshot solve capture and markup well on Windows. The gap shows up when you need the same workflow on Linux, when you want screenshots pasted into spreadsheets, or when you also need proof of how the day was spent. Comparing only the two classics leaves those needs unanswered.
Ask three questions before you lock a tool in:
- Who captures on Linux? ShareX and Greenshot are built for Windows first.
- What happens after the shot? Annotate, blur, share a link, paste into Excel or Sheets, or extract text.
- Do you need a work log? Pure screenshot tools stop at the image. Activity reports are a different product for most vendors.
Platforms
ShareX's official site describes it as a free and open source screenshot tool for Windows. Maintainers have treated Linux as out of scope. Greenshot's FAQ states there are no plans for a Linux version (the Windows app is .NET with Windows Forms; a separate Mac app exists). Algenius runs on Windows and Linux with the same shortcuts, so mixed teams share one habit.
Capture and annotation
ShareX covers region, window, full screen, scrolling capture, screen recording, GIF, OCR via Windows OCR, image annotation, and uploads to many destinations. Greenshot focuses on region, window, and full screen capture, plus a practical editor for annotations, highlight, and obfuscation, with export to file, clipboard, printer, email, and office apps.
In Algenius, Alt+Q captures an area and Alt+A captures the full screen. The editor is the advanced premium editor, fully free: arrows, shapes, text, emoji, step counters, crop, and blur. Video recording is coming to Algenius with AI capabilities built in, and scrolling capture is on the way too.
Sharing, OCR, and work reports
ShareX shines at upload workflows and custom after-capture tasks, including OCR through Windows. Greenshot is lightweight and fast for annotate and export. Algenius shares to the clipboard, a file, or a share link, pastes into Excel and Google Sheets, and on Pro adds AI OCR, Alt+S AI Text Assistant, and a Daily Activity Logger with focus insights.
Price
Plan | ShareX | Greenshot | Algenius |
|---|---|---|---|
Free option | Free (open source) | Free on Windows (open source) | Free plan, unlimited screenshots |
Paid tier | None required | Windows free; Mac is a separate paid app | Pro $15.99/month |
Trial | N/A | N/A | 14-day Pro trial |
Exact Mac App Store pricing for Greenshot can change, so check their site if you need Mac. Algenius Free stays free forever for capture and editing.
Feature comparison
Feature | ShareX | Greenshot | Algenius |
|---|---|---|---|
Platforms | Windows | Windows (Mac separate) | Windows, Linux |
Annotation and blur | Yes | Yes | Yes, free |
Uploads and custom workflows | Strong | Export destinations | Share links |
Paste into Excel and Sheets | Via clipboard | Via clipboard | Built in |
OCR | Yes (Windows OCR) | Plugin / limited | Yes (Pro, AI OCR) |
Daily activity reports | Not listed | Not listed | Yes (Pro) |
Video recording | Yes | Not the focus | Coming soon (AI powered) |
Scrolling capture | Yes | IE scrolling | Coming soon |
Which one fits
Pick ShareX if you live on Windows and want deep upload automation and power-user workflows.
Pick Greenshot if you want a light free annotator on Windows and prefer a simple editor.
Pick Algenius if you need Linux, a free advanced editor for everyone, spreadsheet paste, or Pro AI and daily reports in the same app.
Developers and QA: Capture errors, blur secrets, and log evidence. See document bugs with screenshots.
Remote teams: Pair captures with daily reports. See daily activity reports for remote teams.
Common mistakes
- Ignoring Linux seats: One unsupported desktop splits the team's habits.
- Counting features you never use: Prefer the weekly workflow over the longest checklist.
- Skipping blur: Secrets in tickets are expensive. Blur before you share.
- Skipping a real trial: Run Algenius Pro on live work for the full 14 days.
Free vs Pro for this workflow
Feature | Free | Pro |
|---|---|---|
Unlimited Alt+Q / Alt+A capture | Yes | Yes |
Advanced premium editor | Yes | Yes |
Share links and Sheets paste | Yes | Yes |
AI OCR and Alt+S | No | Yes |
Daily Activity Logger and Focus insights | No | Yes |
Custom branding / watermark | No | Yes |
Pro is $15.99/month with a 14-day free trial. See pricing.
Related guides
Frequently asked questions
Is ShareX free?
Yes. ShareX is free and open source for Windows.
Does Greenshot run on Linux?
No. Greenshot's FAQ says there are no plans for a Linux version. Algenius runs natively on Linux and Windows.
Which is better for annotation, ShareX or Greenshot?
Both annotate well. Greenshot is often praised for a simple editor. ShareX offers a richer capture and upload pipeline. Algenius includes the advanced premium editor on Free.
Does Algenius replace ShareX uploads?
Algenius focuses on capture, editing, share links, spreadsheet paste, AI text tools, and activity logs. Video recording and scrolling capture are coming soon.
Can I try Algenius Pro before paying?
Yes. Pro includes a 14-day free trial, and the Free plan stays free.
Get started
Download Algenius for Windows or Linux, try free capture and the advanced editor today, and start your 14-day Pro trial on the pricing page when you want AI tools and daily reports.
