Apps similar to Markedfile include DocSend. It's paid, but InvisibleWatermark.net and JWProtect are free. Other options are IMATAG. In total there are four Document Managers like Markedfile for the web and self-hosting.
DocSend makes business communication with documents more effective and actionable by providing analytics, feedback, and control for the documents you send. Hundreds of companies use DocSend for everything from sales and marketing to fundraising.
United States
Invisible watermarks are a way to hide text or images inside of photographs. This is most often used as a way to protect your photographs from being copied.
Protect your business from unwanted use of your images and videos.
Identify the sources of leaks with our invisible digital watermark Before sharing sensitive assets, secure them with an invisible ID. Easily detect the source of leakage
Track copies of your photos and video.
France
EU