DevOps tooling covers the systems that build, test, ship and run software: source hosting, CI/CD pipelines, infrastructure as code, container registries, secrets management, monitoring and incident management. Engineering teams use them to turn code changes into running services and to keep those services observable. GitHub, GitLab and Datadog are common reference points.
These tools are trusted with some of the most powerful assets a company has: signing keys, deployment credentials and the ability to change production. A compromised pipeline or build runner can insert code into every release, which is why software supply-chain security has become a policy theme. Hosted runners also execute your code on infrastructure you do not control. Pipelines written in a vendor's own syntax, with proprietary integrations and actions, turn migration into a rewrite rather than an export.
When choosing a European option, check whether you can self-host or use dedicated runners in your own network, how secrets are stored and who at the vendor can read them, and what audit logs exist for pipeline changes. Prefer open-source cores and portable pipelines, look at support for signed builds and software bills of materials, and check that registries and monitoring data stay within the EU.