What are some alternatives?
When comparing Lychee and Piwigo, you can also consider the following products
Flickr - image and video hosting website
Chevereto - Chevereto is a powerful and fast image hosting script that allows you to create your very own full featured image hosting website in just minutes.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.
MediaGoblin - MediaGoblin is a free software media publishing platform that anyone can run.
Adobe Bridge - Download Adobe Bridge CC digital asset management software when you get started with Adobe Creative Cloud. Start your free trial today.