Connect Slack
Share posts and updates into Slack channels. Plan it in the same calendar as every other channel, with AI captions sized to fit.
7-day free trial on every plan. Cancel anytime.
What you can publish to Slack
Every format is previewed before it goes out, so what you see is what your audience gets.
Message
Posts that always fit Slack
Each network has its own rules. PostRocket knows them, sizes AI captions to match and warns you before a post would be rejected.
Slack limits
- Caption length
- 4,000 characters
- Media per post
- Up to 10 files
- Media required
- No, text-only works
The composer checks these as you type and flags anything that won't fit before you schedule.
Up and running with Slack
Create your free account
Start a 7-day trial and set up your first brand.
Choose Slack under Channels
Follow the prompts to authorise PostRocket, then pick the Slack accounts you want to post to.
Write, schedule, done
Draft with AI or by hand, preview it, and pick a time. PostRocket publishes for you.
Also connects with
Run every channel from the same calendar, inbox and brand settings.