Social scheduling
The scheduler that tells you a post will fail before you schedule it
Compose once, aim it at seven networks, and let postfast name every reason a post would be rejected while you are still writing. Join the waitlist for early access.
Publishes to
Seven networks, one composer, one calendar. Each connected account is its own delivery with its own status, so one platform failing never takes the rest with it.
What you can do
Compose
Draft a post or a whole thread, aim it at as many connected accounts as you like, and see what each network will make of it as you type.
Schedule
Pick a publish minute or send it now. postfast holds the post and hands it over when it is due, on every network — including the ones with no scheduling of their own.
Publish
Every target succeeds or fails on its own, with the network’s real error kept verbatim and a retry that resumes a thread rather than reposting it.
What makes it different
Every scheduler has a calendar. The part nobody solved is what happens between pressing schedule and the post going out.
Publish Guard
One pass over the composed post against every network you selected, at compose time. What will be rejected blocks the schedule; what only might be is a warning you can walk past.
Per-target delivery
A post to six accounts is six independent deliveries, each with its own status, its own error and its own retry count. Partial failure stays partial.
Resumable threads
postfast records which parts of a thread a network already accepted, so a retry continues from there. That is the difference between a retry and a duplicate.
An honest X meter
X charges per post — twenty times more with a link in it. postfast passes that price list through instead of averaging it, and tells you the cost before you commit.
Tenancy that is enforced once
Workspaces are applied centrally on every read and write, not remembered screen by screen. One client’s world never leaks into another’s.
Credentials sealed at rest
Every token, app password and instance secret is encrypted under the application secret and returned by no endpoint, to anybody.
Free tools, no account
Some of what postfast does works perfectly well without a login, so it runs here in your browser instead. Nothing you paste into these leaves the page.
Publish Guard
Paste a post, pick the networks, and see every reason it would be rejected.
Character counter
One count, measured against all seven networks’ limits at the same time.
Thread splitter
Turn a long piece of writing into a thread that fits, split at sentence boundaries.
X API cost calculator
What X actually charges to publish a post — and why a link costs twenty times more.
UTM builder
Build a tagged campaign URL without hand-editing a query string.
Common questions
- Which social networks does postfast publish to?
- Seven: X, Bluesky, Threads, Instagram, Facebook Pages, LinkedIn and Mastodon. Every one of them is built and publishing today, not planned.
- Is there a free plan?
- No. There is a fourteen-day trial on the Pro tier that takes no credit card, and four paid plans after it. A free plan that quietly limits you is worse than a trial that does not.
- Is there a limit on how many posts I can schedule?
- No. Every paid plan schedules an unlimited number of posts. Plans differ on connected accounts, seats and workspaces — not on how much you publish.
- Can one post go to several networks at once?
- Yes. Compose once, aim it at as many connected accounts as you like, and each becomes its own delivery with its own status. Publish Guard tells you in advance which networks that body will not fit.
- What happens if one network rejects a post?
- Only that target fails, with the network’s own error kept verbatim, and it is retried. Everything else publishes as normal, and a retried thread resumes from the part that failed rather than starting over.
- When can I use it?
- postfast is pre-launch. Join the waitlist and you will hear from us when early access opens.
Early access opens soon
Leave an address and you will hear from us when it does. No newsletter, no drip sequence.