Buffer is the multi-network classic — it posts everywhere, and charges per channel for the privilege. ONYX goes the other way: BlueSky only, $7/mo flat for unlimited posts, with AI Voice trained on your own writing instead of a generic assistant.
| Feature | ONYX | Buffer |
|---|---|---|
| Price for unlimited posts | $7/mo flat | from ~$15/mo per channel |
| BlueSky-native | Yes — BlueSky-only | No — multi-network, BlueSky supported |
| AI that learns your voice | Yes — trained on your posts | Generic AI assistant |
| AI thread generator | Included | — |
| Insights suite (best times, audience, hashtags) | Included with Pro | Analytics on paid plans |
| Free tier | 5 posts/mo | Yes — limited |
Bufferdetails checked against their public pages, June 2026. Prices say "from" because tiers change — confirm on their site. A dash means we couldn't verify it as a core feature.
ONYX Pro is $7/mo for unlimited posts, full stop. Buffer's tiers start around $15/mo and scale per channel — fine for an agency, steep for one creator on one network.
Buffer's AI assistant writes generic social copy. ONYX trains on your past BlueSky posts and drafts in your actual voice.
Thread composer with auto-split, quote posts, best-times and audience insights — every feature exists because BlueSky creators need it, not because it ports from Instagram.
Buffer does the thing ONYX deliberately doesn't: post everywhere. If you're running Instagram, LinkedIn, X, and BlueSky from one dashboard, Buffer is built for exactly that, and its free tier is a fair way to test multi-network scheduling. If BlueSky is one channel among many for you, Buffer makes sense. If BlueSky is the channel — that's what ONYX is for.
If BlueSky is your main channel, yes. ONYX is BlueSky-native at $7/mo flat for unlimited posts with AI Voice, while Buffer is a multi-network tool that charges from around $15/mo per channel.
Buffer added BlueSky as one of many supported networks. ONYX is built only for BlueSky, so thread auto-split, best-time insights, and AI Voice are tuned specifically for it.
ONYX Pro is $7/mo flat for unlimited posts. Buffer's paid plans start around $15/mo and scale per channel. Confirm current pricing on each site.
5 free posts a month to start. $7/mofor unlimited when you're ready. 14-day money-back guarantee, no questions asked.
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