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PhotoPrism, Islandora, Nextcloud, Dash

Side by side on what we have verified on each vendor’s own pages. Where a fact was not checked, the table says so rather than leaving a blank that reads as “no”.

What decides it · Runs on your own servers

If the files genuinely cannot leave your infrastructure, this is not a close race — the platforms marked No below should not be on the call at all.

PhotoPrism

Yes

Islandora

Yes

Nextcloud

Yes

Dash

No

Everything else

PhotoPrism
Islandora
Nextcloud
Dash
Verdict
A self-hosted, single-container photo indexer under AGPL/commercial licensing, for people who want a private on-hardware archive without Google-Photos-level AI tagging or mobile app polish.
An open-source, community-governed digital repository platform on Drupal, for libraries, archives, and museums to manage digital collections.
A self-hosted file-sync and collaboration platform some organisations stretch into asset-library duty; tagging, batch metadata editing and dynamic tag-based collections are still limited or missing.
A cloud asset library for small-to-mid ecommerce and DTC brands, priced as a flat monthly fee with unlimited users, tiered by storage and downloads.
Price published
Yes
No
Yes
Yes
Billed on
Subscription per edition, billed annually
No published price on islandora.ca — the core software is free open source ("free to use and always will be"). Paid options are hosting/installation/migration/support/training contracts sold by independent third-party service providers listed on islandora.ca/service-providers (e.g. Born-Digital, discoverygarden); islandora.ca itself does not publish their rates or billing units.
Subscription per user per year, cheaper at volume
Flat price per account; users are unlimited, tier set by storage and downloads
Deployment
On-premise, Cloud
On-premise, Cloud
On-premise, Cloud
Cloud
Free plan
Yes
No
Yes
No
Free trial
No
No
No
No
Transparency index
100%
Not checked
80%
60%
Most common complaint
The gap between the free edition and the first paid one is wide: €200 a month
Not checked
It is a file platform with DAM features rather than a DAM: asset-level metadata and rights are thinner
The tier is capped by download count as well as volume, which is a less familiar unit to budget against

“Not checked” means exactly that: we have not verified it, not that the platform lacks it. Every other value was read off the vendor’s own pages on the date shown on each platform page.

What to ask on the demo

One question per platform, drawn from what actually goes wrong with it — not a generic checklist. Vendors run the demo; this hands the agenda back to you.

PhotoPrism The gap between the free edition and the first paid one is wide: €200 a month — ask them to answer this in writing before the trial.
Nextcloud It is a file platform with DAM features rather than a DAM: asset-level metadata and rights are thinner — ask them to answer this in writing before the trial.
Dash The tier is capped by download count as well as volume, which is a less familiar unit to budget against — ask them to answer this in writing before the trial.

No email required — the page prints as it stands.