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PhotoStructure vs Damselfly: catalog facts
PhotoStructure	Damselfly
Freemium Check the developer's site for current plans and what the free version includes.	Free Free to use; the developer accepts donations through Buy Me a Coffee.
Self-hosted	Web, Self-hosted
Finds duplicates, edits and resized copies even when names and dates differ Leaves files in your own folders and original formats	Works on an existing folder-based photo collection Face, object detection and image classification built in
Not open source Details of pricing and supported platforms are not listed in the fetched page	Full facial recognition depends on an Azure Face Services account Needs a server to run
Self-hosted	Self-hosted
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.