Imagify always compresses through its own cloud API rather than locally, but the result is just a static image file by the time a crawl captures it — served static either way. CDN delivery, when enabled, rewrites image URLs the same way. WebP/AVIF delivery is the exception: it commonly relies on a server-level rewrite or a PHP-side Accept-header check that a plain static host doesn't perform on its own.
Same silent-regression risk as every optimizer on this list: a static host that doesn't replicate Imagify's format check will quietly serve the original, larger image to every visitor instead of WebP/AVIF.
Hybrid
Compressed image files, and CDN-rewritten image URLs when CDN delivery is enabled, are both served from the static release as-is.
WebP/AVIF format selection depends on a live per-request check (a server rewrite or a PHP Accept-header check) that a static host doesn't run unless it's separately configured at the host or CDN layer.
None needed — Imagify declares no public routes of its own. WebP/AVIF delivery isn't something a bridge route can fix; it needs to be replicated at the host or CDN layer instead.
No special setup — detected automatically once active. If WebP/AVIF savings matter, confirm the format is still actually being served once the site goes static.
Without that content-negotiation rule replicated at the host or CDN layer, every visitor silently gets the original, larger image format instead of WebP/AVIF — not a broken page, just a quiet performance regression. Pre-generated <picture>/srcset markup sidesteps the problem entirely if the savings matter for this site. None of this has been behaviorally validated against a live install — the classification is rule-derived, which is why WebP/AVIF confidence is capped lower than plain compression.
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