Crosspost from Threads to Bluesky Automatically
Auto post Threads to Bluesky instantly — no downloads, no re-uploads, no manual work. Just publish on Threads and your content appears on Bluesky.
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Threads and Bluesky: two text platforms, zero native bridge
! Both are text-first microblogging platforms — the most compatible format pair
+ ! Threads is Meta/centralized; Bluesky is AT Protocol/decentralized — different philosophies
+ ! No native integration between the two despite format similarity
+ ! Multiple third-party apps (OpenVibe, Croissant, Fedica) specifically handle this pair
↓ There's an easier way
What You Need to Know
How creators keep Threads and Bluesky in sync
The tooling for this pair is better than most.
OpenVibe, Croissant, and Fedica all support simultaneous Threads + Bluesky posting.
Write once, publish to both.
For manual workflows: Threads posts up to 500 characters and Bluesky allows 300 — so Bluesky requires a trim or a tighter edit.
Copy your Threads post, cut to 300 characters for the key idea, and post it as a skeet.
CNET, Fedica, and Pocket-lint all covered this workflow specifically when Bluesky surged in late 2024, reflecting how common this pairing has become.
Making your Bluesky posts feel like native skeets
Bluesky users are skeptical of content that feels algorithmically syndicated.
A Threads post that ends with Instagram-native markers ('save this post,' 'follow for more') will stick out badly.
Strip the call-to-action language.
Bluesky's culture rewards directness and genuine takes — not engagement-bait.
The AT Protocol angle means Bluesky users care about open-web topics; if your Threads post touches on platform independence, digital rights, or creator ownership, it will land better on Bluesky than on Threads itself.
PostOnce keeps your Threads and Bluesky audiences updated simultaneously
PostOnce connects Threads and Bluesky and handles cross-platform publishing automatically.
Post on Threads — PostOnce syncs the content to Bluesky without any manual effort.
For creators maintaining presence on both text platforms, PostOnce eliminates the duplicate work entirely.
One post, both communities.
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Features
How PostOnce Handles It
Set up Threads to Bluesky crossposting once. PostOnce automates the rest.
Easy Threads Crossposting Setup
Connect your Threads and Bluesky accounts, choose your crosspost rules, and you're done.
Setup takes under 60 seconds. After that, everything runs automatically in the background.
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Native Video Upload to Bluesky
When you crosspost Threads to Bluesky, PostOnce uploads the actual video file — not a link, not a preview.
Your Threads content appears as a native Bluesky post, indistinguishable from content uploaded directly.
Start your free trialCustom Crosspost Rules
Not every Threads post belongs on Bluesky. Set hashtag filters, content type rules, or account-level controls to choose what gets crossposted.
Only the content you want on Bluesky ends up there.
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Auto Post to Multiple Platforms
Don't stop at Threads to Bluesky crossposting. Auto post your Threads content to YouTube Shorts, Facebook, LinkedIn, Threads, and more — all at once.
One post, everywhere. Each platform gets a native upload with adapted formatting.
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Real-Time Automation
PostOnce monitors your Threads account and automatically crossposts new content to Bluesky.
No scheduling, no batching. Publish on Threads and it appears on Bluesky within minutes — fully automated Threads to Bluesky posting.
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Threads vs Bluesky at a Glance
| Spec | Threads | Bluesky |
|---|---|---|
| Caption Limit | 500 chars | 300 chars |
| Max Video Length | 5min | 1min |
| Preferred Aspect Ratio | 9:16 | 16:9 |
| Max Video File Size | 1GB | 50MB |
| Carousel Support | Up to 20 items | Up to 4 items |
| Hashtag Strategy | Up to 1 | Unlimited |
| Link Support | Yes | Yes |
| Primary Audience | 18-34 | 20-40 |
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Under 60 seconds. Connect both your Threads and Bluesky accounts, choose your filter rules, and you're done. New Threads posts will automatically appear on Bluesky.
PostOnce automatically adapts your 9:16 Threads videos to Bluesky's preferred 16:9 format, ensuring they look native.
Yes. Use hashtag filters to control which posts crosspost. For example, add #crosspost to Threads captions and only those posts will go to Bluesky. Or exclude specific hashtags to skip certain content.
PostOnce intelligently adapts your captions from Threads's 500 character limit to fit Bluesky's 300 character limit, preserving your key message.
Start Crossposting Threads to Bluesky
Connect your Threads and Bluesky accounts and start crossposting in minutes. No technical setup required.
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