MergeMe sends GitHub pull request and GitLab merge request notifications to Slack for code review. Each PR or MR gets one Slack card that updates in place when status changes (opened, in review, approved, merged, and more) instead of posting a new Slack message for every event like the official GitHub and GitLab Slack apps.
Review comments appear as thread replies on that same card. GitLab and GitHub @mentions in comments can be mapped to Slack @mentions. Route different repos or projects to different Slack channels, with optional label-based routing. One workspace can connect GitHub.com, GitLab.com, and self-hosted GitLab at the same time.
Supported sources: - GitLab.com (OAuth, automatic webhook setup) - GitLab self-hosted (webhook URL and signing token you add in GitLab) - GitHub.com (GitHub App install)
Optional CI status on each card shows GitHub checks or GitLab pipeline rollup (e.g. CI: Running (2/5)) when enabled in Routing preferences.
Website: https://mergeme.dev Docs: https://mergeme.dev/docs
A startup from the United Kingdom.
Single updating Slack card
One Slack message per PR or MR; status changes update the same card instead of posting a new notification every time.
Threaded review comments
GitHub/GitLab review comments post as replies on that card so the conversation stays in one place.
Channel routing
Send different repos or projects to different Slack channels from one workspace.
User mention mapping
Map GitLab/GitHub usernames to Slack users so @mentions in comments notify the right people.
Multi-git workspaces
Connect GitHub.com, GitLab.com, and self-hosted GitLab in the same MergeMe workspace.
Self-hosted GitLab
Works with on-prem GitLab via webhook URL and signing token; no need to expose GitLab to extra SaaS beyond MergeMe.
Label routing
Optional rules to route or filter notifications based on merge request labels.
CI status on cards
Optional rollup of GitHub checks or GitLab pipelines on the Slack card (e.g. CI: Running (2/5)).
Engineering teams and engineering managers who use Slack for day-to-day communication and GitHub or GitLab for code review, especially when:
MergeMe started from a practical problem: teams loved Slack for collaboration but hated how official GitHub and GitLab Slack integrations treated every MR/PR event as a separate message. Channels became noisy, threads broke apart, and it was hard to see what actually needed review.
The idea was simple - treat each pull request or merge request as one living Slack card that updates as review state changes, with comments as thread replies. From there it grew into routing, mention mapping, multi-git workspaces, and self-hosted GitLab support for teams that cannot or do not want to rely on the default apps.
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