Product limits#

This page describes some of the product limits that apply to Mattermost, including hard and recommended limits.

Feature	Hard Limit	Recommended Limit
Group messages	8 participants	If 8 isn’t enough, create a private channel
Call participants	Unlimited	50
Custom brand text	500
Custom site description	1024
Advanced log output	500 MB file size, 1000 audit records
Custom status	100 characters
Channel name	64 characters
Channel purpose	250 characters
Channel header	1024 characters
Bookmarked links & files	50
Message acknowledgement response time	5 minutes
Custom user group notifications	256 users per group
Emoji reactions per message	50
Custom emoji uploads	6000
Team description	50 characters
SSO user session duration	30 days
Mobile user session duration	30 days
Attachments per message (files or images)	10
Attachment file size	100 MB	Configurable
Attachment image file size	253 MB	Configurable
Attachment dimensions	7680 pixels x 4320 pixels	Configurable
Attachment image resolution size	33 MP (mega pixels) or 8K resolution	Configurable
User nickname	64 characters
Message length	16,383 characters
Teams per deployment	10,000
Users per team	No enforced limit	Dependent on infrastructure