imgix, WoodWing Assets, Contentstack, CELUM

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.

imgix

WoodWing Assets

Yes

Contentstack

CELUM

Everything else

imgix

WoodWing Assets

Contentstack

CELUM

Verdict

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.

An enterprise digital asset management platform for newsrooms, publishers, museums, agencies, and manufacturers to organize and distribute digital assets.

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 enterprise DAM bundled with workflow and creative-review tools, aimed at mid-to-large manufacturing and consumer brands needing deep Adobe/PIM/CMS/e-shop integration and partner-led setup.

Price published

Yes

Billed on

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.

Not disclosed publicly. Pricing page shows three tiers (Starter, Advanced, Ultimate) all gated behind "Request a quote", billed annually; no per-user, per-GB, or credit figures are shown, so the actual billing unit cannot be confirmed from the vendor's site.

Quoted per customer

Deployment

Cloud

Cloud, On-premise

Cloud

Free plan

Yes

Free trial

Transparency index

Not checked

30%

Most common complaint

Not checked

A free start exists, but the terms for moving to a paid tier are not on the page

The pricing page contains neither tiers nor figures

“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.

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.

CELUM The pricing page contains neither tiers nor figures — ask them to answer this in writing before the trial.

No email required — the page prints as it stands.