Filestack, WoodWing Assets, ImageKit, ResourceSpace

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.

Filestack

WoodWing Assets

Yes

ImageKit

ResourceSpace

Yes

Everything else

Filestack

WoodWing Assets

ImageKit

ResourceSpace

Verdict

A file upload, transformation, and delivery API with a drop-in picker for 20+ sources, for developers adding file handling to web and mobile apps.

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

An image and video CDN with an API-first asset library, built for fast developer integration, billed on flat monthly tiers with per-GB overage once bandwidth or storage limits are exceeded.

An open-licence, self-hosted DAM for teams with in-house server admin capability, trading a free licence for the time to run upgrades, tune dependencies and troubleshoot it themselves.

Price published

Yes

Billed on

Monthly subscription tiers with bundled resource allowances (bandwidth in GB, uploads counted per file, transformations per file/image operation, storage in GB, number of team members), plus per-unit overage fees once a tier's allowance is exceeded (e.g. Start plan overage is $0.2/GB bandwidth).

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.

Bandwidth, storage and user seats, with published per-unit rates above the limits

Self-hosted: no licence fee. Hosted: a user ceiling per tier

Deployment

Cloud

Cloud, On-premise

Cloud

Cloud, On-premise

Free plan

Yes

Free trial

Yes

Transparency index

Not checked

70%

60%

Most common complaint

Not checked

Several units are metered at once: bandwidth, storage, video units and seats

The free route is genuinely free of licence fees but moves hosting, upgrades and support onto you

“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.

ImageKit Several units are metered at once: bandwidth, storage, video units and seats — ask them to answer this in writing before the trial.

ResourceSpace The free route is genuinely free of licence fees but moves hosting, upgrades and support onto you — ask them to answer this in writing before the trial.

No email required — the page prints as it stands.