Every limit here mirrors what PostWire enforces at publish time, not a guess. Publishing to X and Reddit is not available on PostWire yet; their limits are listed for reference.
| Network | Characters | Media | Hashtags | Approval |
|---|---|---|---|---|
| 10,000 | optional | none — Reddit has no hashtags | yes | |
| YouTube | 5,000 | a video (required) | 3-5 hashtags in the description, never more than 15 total | yes |
| Telegram | 4,000 | optional | not needed | no |
| 3,000 | optional | 3 hashtags (5 max) at the end | yes | |
| TikTok | 2,200 | a video (required) | max 5 hashtags, inside the caption (comments are invisible to the algorithm) | yes |
| 2,200 | a photo or video (required) | max 5 hashtags at the END of the caption | yes | |
| 2,000 | optional | 1-3 hashtags | yes | |
| Discord | 2,000 | optional | not needed | no |
| Mastodon | 500 | optional | 2-4 hashtags in CamelCase (#SocialMedia, not #socialmedia) for screen readers | no |
| Bluesky | 300 | optional | 1-2 specific hashtags | no |
| X | 280 | optional | 1-2 hashtags, zero is fine | yes |
PostWire takes one idea and publishes a version written for each network, in a single API call or a single MCP tool call from an AI agent.
PostWire takes one idea and publishes a version written for each network — the right length, hashtags and format per platform. It also refuses posts that would fail, like a video network with no video, before they are queued.
Free for one brand — 20 posts a month, 2 networks per post, no card. Starter is $9/month for three brands, 300 posts and every network in each post. There is a REST API and an MCP server if you would rather automate it.
Start free — no card →