<b>Scheduling Threads carousels: which tools handle multi-image right</b>

<b>Scheduling Threads carousels: which tools handle multi-image right</b>

Tested carousel posting across four tools for 13 days. This is where schedulers quietly fall apart.

The API allows up to 20 items per carousel, but each child must be uploaded as its own container first, then bundled. Most tools handle 1-2 images fine and break past that.

— Metricool: handled 10-image carousels, kept order, but capped its UI uploader at 10
— Publer: did the full set via media URLs, though re-ordering after upload was clumsy
— Buffer: technically supports it but the preview only shows the first image, so you're flying blind on order

The annoying limitation everywhere: you cannot mix video and image in a scheduled Threads carousel through these tools, even though the platform allows it natively.

Verdict: For image-only carousels, Metricool is <b>Worth it</b>. For mixed media, schedule it manually in-app — every tool is a <b>Skip</b> there.