The only option that I know of is Dropbox. they're a classic player in this space with an acceptable track record (afaict). They have a nice app with auto-uploading of pictures, they dump them into a single folder with zero modification, preserving all metadata. Creating a photo album to share is as simple as putting all the jpegs into a folder and choosing "share" in their UI. You can create share links with the usual expected gradients of public accessibility, or you can share them with only specific authorized Dropbox users.