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Islandora, Acquia DAM, Contentstack, imgix

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.

Islandora

Yes

Acquia DAM

No

Contentstack

No

imgix

No

Everything else

Islandora
Acquia DAM
Contentstack
imgix
Verdict
An open-source, community-governed digital repository platform on Drupal, for libraries, archives, and museums to manage digital collections.
A quote-only enterprise DAM (formerly Widen) built on configurable metadata and external sharing portals, for organisations already standardised on the Acquia stack.
An enterprise headless CMS and composable DXP for developer-led teams needing multi-channel content delivery, with a native asset-management module that's newer and thinly reviewed.
An image and video API for real-time resizing, compression, and format conversion via URL parameters, built for developers at ecommerce, media, and agency teams.
Price published
No
No
No
Yes
Billed on
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.
Organisation size, user count, storage volume and feature set
Quoted per customer
Consumption-based credits, sold in monthly tiers ($25–$500/mo self-serve, custom above that). Credits are spent on Management (2 credits/GB/month for stored assets), Delivery (1 credit/GB bandwidth), and Transformation (variable by operation). Per-credit rate drops as plan tier rises ($0.25 down to $0.12, monthly billing; slightly cheaper on annual commitment). Each plan also states an implied storage/bandwidth cap in GB.
Deployment
On-premise, Cloud
Cloud
Cloud
Cloud
Free plan
No
No
Yes
No
Free trial
No
Yes
No
No
Transparency index
Not checked
20%
30%
Not checked
Most common complaint
Not checked
Cost depends on four variables at once, none of them priced publicly
A free start exists, but the terms for moving to a paid tier are not on the page
Not checked

“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.

Acquia DAM Cost depends on four variables at once, none of them priced publicly — ask them to answer this in writing before the trial.
Contentstack A free start exists, but the terms for moving to a paid tier are not on the page — ask them to answer this in writing before the trial.

No email required — the page prints as it stands.