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Self-hosted GitLab Slack integration
Self-hosted GitLab Slack notifications
Send merge request notifications from your own GitLab instance to Slack as one updating card per MR. MergeMe connects via webhook - no inbound access to your network required.
What is this?
MergeMe posts self-hosted GitLab merge request notifications to Slack as one updating card per MR. Status changes update the existing message in place. Review comments appear as thread replies, and GitLab @mentions can map to real Slack @mentions.
The problem with default GitLab Slack notifications
- The official GitLab Slack app posts a new message for every merge request event
- Busy channels fill up with duplicate MR posts as reviews progress
- Hard to see MR status at a glance when messages scroll away
- Self-hosted teams still need per-project webhook setup with basic integrations
How MergeMe helps
- One Slack card per merge request, updated in place as the MR moves through review
- Thread replies for GitLab review comments on the same card
- Per-project channel routing - different GitLab projects to different Slack channels
- Label routing to override the default channel when specific labels are present
- User mapping so GitLab @mentions become Slack @mentions
- Webhook payloads only - MergeMe does not read private source code
Setup overview (~10 minutes)
- Sign in at mergeme.dev and create a workspace with Self-Hosted GitLab as your main platform
- Connect Slack under Sources
- Copy your webhook URL and signing token from Sources → Self-hosted GitLab
- In GitLab: Settings → Webhooks on each project (or group on Premium/Ultimate) - paste URL and token, enable Merge request and Note events
- Add channel mappings in Routing → Channel mappings using each project ID
- Optionally map GitLab usernames to Slack users under Routing → User mappings
Full walkthrough: Install MergeMe for self-hosted GitLab.
FAQ
- Does MergeMe need inbound access to my GitLab server?
- No. Your GitLab instance sends outbound webhooks to MergeMe. MergeMe never connects into your VPC or firewall.
- What GitLab events does MergeMe need?
- Merge request events and note (comment) events. Register the webhook URL and signing token from the MergeMe dashboard on each project, or use group-level webhooks on GitLab Premium/Ultimate.
- Can I mix self-hosted GitLab with GitLab.com or GitHub?
- Yes. One MergeMe workspace can connect self-hosted GitLab, GitLab.com, and GitHub.com with per-source channel routing.
- Does MergeMe read my source code?
- No. MergeMe processes webhook payloads only. It does not clone repositories or read private code.
Start free on MergeMe
Hobby plan is free for small teams. Self-hosted setup takes about 10 minutes per project.