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Zapier makes it easy to integrate Slack with Mattermost - no code necessary. See how you can get setup in minutes.
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Slack
Slack
1. Choose trigger event
Mattermost
Mattermost
2. Choose action
1. Select the event
Setup
Test
Slack
Choose a trigger event
Choose a trigger
A trigger is the event that starts your Zap—like a "New Public Message Posted Anywhere" from Slack.
Add your action
An action happens after the trigger—such as "Post Message" in Mattermost.
You’re connected!
Zapier seamlessly connects Slack and Mattermost, automating your workflow.
Supported triggers and actions
Zapier helps you create workflows that connect your apps to automate repetitive tasks. A trigger is an event that starts a workflow, and an action is an event a Zap performs.
Create a new record or update an existing record in your app.
Conversation ID
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Users
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Title
Content
Channel ID
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Send Multi Message
Message Text
Required
Send as a bot?
Include a link to this automation?
Attach Image by URL
Auto-Expand Links?
Link Usernames and Channel Names?
Schedule At
Zap_id
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Allowed_edit_copy
Conversation ID
Required
Message TS (ID)
Required
Posted By
Content Type
Reply Broadcast
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Add Zapier app to channel automatically?
Message Text
Required
Send as a bot?
Bot Name
Bot Icon
Include a link to this automation?
Attach Image by URL
Auto-Expand Links?
Link Usernames and Channel Names?
Schedule At
Zap_id
File
Thread
Send Channel Message?
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Topic
Required
Topic set by
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Status Text
Status Emoji
Expiration Time
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Remove User from Channel
This action removes a specified user from a specified channel in Slack.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Edit Message
This action updates a specific message sent by the same Authenticated user on Slack. You need to provide the Channel ID, the Timestamp of the message to be edited, and the new text for the message.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Find Public Channel
This action will find a public channel in Slack using either the channel's ID or name.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Delete Message
This action deletes an existing message in a specific channel on Slack. You need to provide the channel ID and the message timestamp as inputs.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Conversation ID
Required
Action
This is an event a Zap performs.
Search
Find existing data in your app
Conversation ID
Required
Message ID (ts)
Required
Action
This is an event a Zap performs.
Search
Find existing data in your app
Search Query
Required
Sort By
Sort Direction
Include Bot Messages in Search Results?
Action
This is an event a Zap performs.
Search
Find existing data in your app
ID
Required
Return Raw Results?
Action
This is an event a Zap performs.
Search
Find existing data in your app
Guidance_copy
Username
Required
Return Raw Results?
Action
This is an event a Zap performs.
Search
Find existing data in your app
For AI agents & developers
Use Slack and Mattermost with AI agents and code
Beyond Zap workflows. Call Slack and Mattermost actions directly from your AI client or your codebase, using the same 9,000+ app integrations Zapier already runs.
No code
Connect via Zapier MCP
Expose Slack and Mattermost actions as tools in any MCP client. Authenticate once, then call them in natural language.
Example actions on this page
Add Reaction
Post Message
Works with
Claude · ChatGPT · Cursor · any MCP-compatible client
There is no Python package yet. SDK is TypeScript-only (@zapier/zapier-sdk). The MCP server URL is personal to your account; get it at zapier.com/mcp.
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Customers have created over 25 million Zaps on the platform
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The average user takes less than 6 minutes to set up a Zap
Practical ways you can use Slack and Mattermost
Monitor team communication seamlessly.
When a specific Slack channel receives a new message, Zapier posts it to a Mattermost channel of your choice. This provides centralized communication, ensuring no messages are missed and making collaboration smoother.
When a customer mentions your support team in Slack, Zapier automatically triggers a message in a relevant Mattermost channel to notify teammates for faster response times.
When a new public message is posted in Slack, automatically post it as a message to a designated Mattermost channel. This keeps teams updated across both platforms, eliminating the hassle of checking multiple locations for updates.
Level up your Slack to Mattermost integration with AI. Extract, summarize, and transform your integration data with leading AI models like OpenAI, Anthropic, and more.
Frequently Asked Questions about Slack + Mattermost integrations
New to automation with Zapier? You're not alone. Here are some answers to common questions about how Zapier works with Slack and Mattermost
How can we integrate Slack with Mattermost?
Integrating Slack with Mattermost involves using a service like ours to create Zaps that allow the two platforms to communicate. You'll set up triggers in Slack, such as when a new message is posted in a channel, and actions in Mattermost, like creating a post or sending a message to a specific channel.
What are some common triggers for connecting Slack and Mattermost?
Common triggers when connecting Slack with Mattermost include receiving new channel messages, mentions of specific keywords, or changes in user status. These can be set up to automatically perform certain actions, like posting updates or messages in Mattermost channels.
Can we customize the actions taken in Mattermost based on Slack events?
Yes, you can customize actions in Mattermost based on various Slack events. For example, you might set an action to create detailed posts or alerts in designated Mattermost channels whenever there’s a new file upload or channel invitation event on Slack.
Are there limitations when syncing messages between Slack and Mattermost?
While syncing messages between Slack and Mattermost is robust, there are limitations such as potential delays due to API call limits or discrepancies in formatting between the platforms. Our integration minimizes these issues but it's important to be aware of them.
Is it possible to use reactions from Slack as triggers for actions in Mattermost?
Yes, reactions added to messages in Slack can be used as triggers. For instance, adding a specific emoji reaction could trigger an action that sends an alert or logs the message content into a designated channel within Mattermost.
How do we ensure secure data exchange when integrating Slack with Mattermost?
We ensure secure data exchange by using encrypted connections and following best practices for authentication. Additionally, setting permissions carefully within both platforms helps maintain data integrity and security throughout the integration process.
What happens if there's an error during the integration process?
If there's an error during the integration process between Slack and Mattermost, our system provides detailed logs and alerts to help identify and correct issues quickly. You can also configure automatic retries for certain failed tasks.
About Slack
Slack is a platform for team communication: everything in one place, instantly searchable, available wherever you go. Offering instant messaging, document sharing and knowledge search for modern teams.
