Platform support
What each platform accepts, generated from the connectors actually registered in the app. A platform absent from the first table cannot be connected or published to, whatever else you may have read.
Publishing
| Platform | Connect | Post kinds | Caption limit | Max media | Notes |
|---|---|---|---|---|---|
| Bluesky | Paste credentials | text, images | 300 | 4 | — |
| Facebook Pages | OAuth | text, link, image, carousel, story | 63,206 | 10 | Publishing stays dry-run gated until Meta app review passes. |
| Google Business | OAuth | text, image | 1,500 | 1 | — |
| OAuth | image, carousel, reel, story | 2,200 | 10 | — | |
| OAuth | text, image, multi_image, document, video | 3,000 | 20 | Post analytics are unavailable: LinkedIn gates that API behind business verification. | |
| Mastodon | OAuth | text, image, video | 500 | 4 | — |
| OAuth | image, video | 800 | 1 | — | |
| OAuth | text, image | 40,000 | 1 | — | |
| Threads | OAuth | text, image, carousel | 500 | 20 | Publishing stays dry-run gated until Meta app review passes. |
| TikTok | OAuth | video | 2,200 | 1 | — |
| X | OAuth | text, images, video | 280 | 4 | — |
| YouTube | OAuth | video | 5,000 | 1 | Uploads are forced to private visibility until Google audit passes. |
Not available
None.
Inbox
What each platform gives your Inbox and whether you can reply to it from Postlyra.
| Platform | Reaches the Inbox | How it arrives | Reply from Postlyra |
|---|---|---|---|
| Bluesky | DMs, replies, mentions | Read every few minutes | Yes |
| Facebook Pages | DMs, comments | Live | Yes |
| Google Business | Nothing | Not available | No |
| DMs, comments | DMs live, the rest read every few minutes | Yes | |
| Nothing | Not available | No | |
| Mastodon | DMs, replies, mentions | Read every few minutes | Yes |
| Nothing | Not available | No | |
| Nothing | Not available | No | |
| Threads | replies | Read every few minutes | Yes |
| TikTok | Nothing | Not available | No |
| X | Nothing | Not available | No |
| YouTube | comments | Read every few minutes | Yes |
Video requirements
A video is checked against these before it can be scheduled, so a misfit shows up in the composer rather than failing hours later at the slot.
| Platform | Max size | Duration | Container | Video codec | Audio codec | Max dimension |
|---|---|---|---|---|---|---|
| 315 MB | 3s to 15 min | mov, mp4, m4a, 3gp, 3g2, mj2 | h264 | aac | 1920px | |
| 524 MB | 3s to 30 min | mov, mp4, m4a, 3gp, 3g2, mj2 | h264 | aac | — | |
| Mastodon | 40 MB | 0s to 1 min | mp4 | h264 | aac | — |
| 2 GB | 4s to 15 min | mov, mp4, m4a, 3gp, 3g2, mj2 | h264 | aac | — | |
| TikTok | 4 GB | 1s to 10 min | mov, mp4, m4a, 3gp, 3g2, mj2 | h264 | aac | — |
| X | 537 MB | 0s to 2 min | mp4, mov | h264 | aac | — |
| YouTube | 4 GB | 1s to 12 h | mov, mp4, m4a, 3gp, 3g2, mj2 | h264 | aac | — |
Reading the table
Connect is how you link the account. "One-click OAuth" redirects you to the platform and back. "Credentials you paste" means you generate a token or app password on the platform's own site and paste it into Postlyra.
Post kinds are what the connector can publish. A platform without text needs media on every post.
Caption limit is the platform's own character cap. The composer enforces it before you can schedule.
Max media is how many images or slides one post can carry.
Caveats that are not in the table
Things that will surprise you
Threads and Facebook Pages have working connectors that post through the platforms' own APIs. What limits them in practice is Meta's own app review of the permission, not anything in Postlyra.
YouTube uploads are forced to private visibility, regardless of what you pick, until Google's audit completes.
LinkedIn and Google Business have no post metrics driver. LinkedIn gates that API behind business verification; Google Business Profile has none in Postlyra today. Every other platform above reports its own post metrics and follower count.
X posts for real, but connecting one needs a paid plan: it is gated behind the x_connection plan feature, not free on every plan the way the rest of this table is.
Studying other people's posts works by saving them, on every platform. Save a post into Inspiration from the Chrome extension, a pasted link or the phone's share sheet, and Postlyra analyses it.
Reddit and Google Business have no Engage support: replies, DMs and mentions on those platforms never reach your Inbox.
Per-platform guides
Adding a platform
A platform is publishable when a connector for it is registered. There is no configuration flag, no beta list, and no per-account toggle. If it is in the table above, it works. If it is not, it does not exist yet.