Travis CI, CircleCI, JetBrains TeamCity, Microsoft Team Foundation Server, Octopus Deploy, Earthly, Codeship, AppVeyor, Buildbot, Drone.io, Taskcluster, Screwdriver, Bitrise, TeamForge, GreenhouseCI, Shippable, Semaphore, IKAN ALM, Osdn.net, Razorops, Krosswall, Ansible Semaphore, Buildkite are some alternatives to Azure DevOps.