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Threads & Bluesky

Threads (Meta) and Bluesky (AT Protocol) are both text-first networks that also support images, video, and reply chains. They share a family resemblance but differ in their limits and their extras — this page covers each.

Threads

Formats and limits

Setting Limit
Caption Up to 500 characters
Formats Single post, carousel, thread
Carousel 2–20 items
Video 1 per post, up to ~1 GB, up to 5 minutes
Alt text Up to 1,000 characters
Thread Up to 25 posts

Media rules

  • Carousels hold 2–20 items — more generous than Instagram's 10. Attach several images (or images and a video) and Buzzator publishes them as a carousel.
  • Only one video per post. If a carousel contains more than one video, the extra videos are dropped — build carousels with a single video at most.

Thread mode

Set the format to thread to publish a chain of posts, each replying to the one before. A thread can run up to 25 posts. If a post mid-chain fails, Buzzator flags the thread as partially published and links you to the first post.

Reply control

Choose who can reply to a Threads post:

Option Who can reply
Everyone Anyone (the default)
Accounts you follow Only people you follow
Mentioned only Only users tagged in the post

Reply control applies to the first post of a thread; the replies in the chain inherit it.

Bluesky

You connect Bluesky with your handle and an app password (generated in your Bluesky settings) rather than a normal OAuth login — Buzzator never sees your main password.

Formats and limits

Setting Limit
Caption Up to 300 characters
Formats Single post, thread
Images Up to 4
Video 1 per post, up to ~50 MB, up to 60 seconds
Alt text Up to 2,000 characters
Languages Up to 3

Bluesky video is small and short

Bluesky's video ceiling is tight — about 50 MB and 60 seconds. Trim or compress longer clips before you attach them, or the upload is rejected.

Rich text: links, mentions & hashtags

Bluesky doesn't render inline Markdown. Instead, Buzzator scans your post text and turns @mentions, links, and #hashtags into real, tappable links automatically — you just type them into the caption. No special syntax needed.

Languages

Tag a post with up to 3 languages. Setting the language helps Bluesky surface your post to the right audiences; posts default to English when you don't specify.

Content labels

Apply a self-label so Bluesky-aware clients render a content warning over your post. The available labels are:

  • Pornographic content
  • Sexually suggestive
  • Nudity
  • Graphic media

Thread mode

Set the format to thread to publish a chain of reply posts. Each post obeys the 300-character cap. As with Threads and X, a mid-chain failure is reported as a partial publish rather than a clean success.