Platforms Supporting Signed Commits

Git Platform		Links
Azure DevOps	Supported but not visible in the user interface.	Feature Requests Show whether commits are verified with GPG key on UI
Atlassian Bitbucket Cloud		Roadmap https://www.atlassian.com/wac/roadmap/cloud/enforced-signed-commits?p=d704eead-54 Feature Requests: [BCLOUD-3166] Support signed commits for Git [BCLOUD-22536] Add Verify Committer option
Atlassian Bitbucket Data Centre	Available using a Commit Hook but not indicated on the user interface.	Roadmap https://www.atlassian.com/wac/roadmap/data-center/signed-commits-visibility?search=Signed%20Commits&p=6e398105-b5 Feature Requests [BSERV-9983] Show whether or not commits are signed in commit log Documentation Using GPG keys \| Bitbucket Data Center and Server 8.11
GitHub	Supported and indicated in the user interface.	Documentation Signing commits - GitHub Docs
GitLab	Supported and indicated in the the user interface.	Documentation Sign commits with GPG \| GitLab
Others	See your platform’s documentation