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Piwigo vs Flickr: catalog facts
Piwigo	Flickr
Freemium Self-hosted Piwigo is free; Piwigo Cloud is a paid service with a free trial.	Freemium Free to join; Flickr Pro adds unlimited storage and removes ads.
Web, Self-hosted	Web
Same open-source core for self-hosted and cloud versions Plugin system and API	Large photography community Unlimited storage with Pro
Self-hosting requires your own web server Paid support is separate from the free version	Free accounts show ads and have limits Hosted service with no self-hosting option
Self-hosted, Hosted service	Web application, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
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.