Communities and chat
Slack Message Scheduler
Schedule Slack messages to any channel in your workspace, with pictures.
What you can post to Slack
- Messages
- Messages with pictures
- Replies
Settings for each message
- Channel
Slack limits
BrokenPost follows these rules and warns you before a message breaks one.
| Characters | 400,000 characters |
|---|---|
| Media | Pictures (PNG, JPG, GIF), no video |
| Video | Not supported |
| Channel | Pick one per post |
| Replies | Yes |
- Slack only takes pictures here, not videos.
- Pick the channel in the Slack settings of the post.
How to schedule a Slack message
- 1
Connect Slack. Add BrokenPost to your Slack workspace and pick a channel for each post.
- 2
Write your message. Post the same thing to other apps at once if you want.
- 3
Pick a date and time and click schedule. BrokenPost posts it for you, then shows it on your calendar.
Ways people use BrokenPost for Slack
Team updates
Post the weekly update in #general every Monday at 9am.
Community workspaces
Share news with a customer Slack community.
Launch notes
Tell the team what shipped at the same time you tell the world.
Common Slack errors and how to fix them
These are the messages BrokenPost shows when Slack turns a message down.
| What you see | How to fix it |
|---|---|
| No video support for Slack, only images | Remove the video and attach a PNG, JPG or GIF. |
Or ask your AI to post to Slack
Connect ChatGPT, Claude or another AI agent once. Then ask in plain words:
- “Post this weekly update in #team on Slack every Monday at 9am.”
- “Share our launch post in #announcements when it goes live on LinkedIn.”
- “Send this chart to #marketing on Slack tomorrow morning.”
What the Slack scheduler costs
Every plan includes Slack and every other app. Paid plans start with a 7-day free trial.
| Free | Free · 1 brand · 20 posts a month |
|---|---|
| Creator | $19/month or $12/month yearly · 3 brands · unlimited posts |
| Pro | $29/month or $19/month yearly · 10 brands · unlimited posts · +5 brands for $19/month |
| Team | $99/month or $49/month yearly · 25 brands · unlimited posts · +10 brands for $39/month |
Questions people ask
How do I schedule Slack messages?
Connect Slack in BrokenPost, write your message, pick a date and time, and click schedule. BrokenPost publishes it for you, even when your computer is off.
What is the Slack character limit?
BrokenPost lets you write up to 400,000 characters per message on Slack, the same limit Slack uses. The editor counts as you type.
Can I add pictures or videos to Slack messages?
Pictures (PNG, JPG, GIF), no video.
Is there a free Slack message scheduler?
Yes. The Free plan includes 1 account on every app and 20 posts a month. Paid plans start at $19 a month with unlimited posts.
Can AI schedule Slack messages for me?
Yes. Connect ChatGPT, Claude, Claude Code or another AI agent to BrokenPost and ask in plain words, like "Post this weekly update in #team on Slack every Monday at 9am."
How do I connect Slack?
Add BrokenPost to your Slack workspace and pick a channel for each post.
Can I post replies or comments on Slack?
Yes. Add more parts under your message and BrokenPost posts them as replies, right after the first one.
Schedule to more apps
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