Sure, I can provide you with a list of top DevOps companies. Keep in mind that my information is based on data available up to September 2021, so there might have been changes since then. Here are some notable DevOps companies:

1. Amazon Web Services (AWS): AWS provides a wide range of cloud services and has a strong focus on DevOps practices to help customers deploy and manage applications efficiently.

2. Google Cloud Platform (GCP): Google’s cloud services also emphasize DevOps and offer tools for continuous integration, delivery, and deployment.

3. Microsoft Azure: Azure is Microsoft’s cloud platform, which offers DevOps tools and services to facilitate collaboration between development and operations teams.

4. Docker: Docker revolutionized containerization, making it easier to package applications and their dependencies for consistent deployment across various environments.

5. Jenkins: An open-source automation server, Jenkins is widely used for continuous integration and continuous delivery (CI/CD) pipelines.

6. GitLab: GitLab provides a complete DevOps platform, including version control, CI/CD, and more, all in a single application.

7. Atlassian (Bitbucket, Bamboo): Atlassian offers tools like Bitbucket for version control and Bamboo for CI/CD, allowing teams to manage their DevOps processes.

8. HashiCorp: Known for tools like Terraform, Vault, and Consul, HashiCorp focuses on infrastructure automation and management.

9. Red Hat: Red Hat provides open-source solutions, including Ansible for automation and OpenShift for container orchestration.

10. New Relic: New Relic offers monitoring and observability tools that help teams gain insights into application performance and troubleshoot issues.

11. PagerDuty: PagerDuty specializes in incident response and management, ensuring that DevOps teams can quickly address and resolve problems.

12. Splunk: Splunk offers a platform for data analysis and monitoring, aiding in DevOps processes by providing insights into various aspects of application performance.