There are several open source platforms that perform similar functions to Kubernetes, including:

- Docker Swarm
- Apache Mesos
- Hashicorp Nomad
- OpenShift
- Rancher

Each of these similar platforms has its own strengths and weaknesses, and the best choice for your use case may depend on factors such as the size and complexity of the application, the required level of customization and control, and the overall goals and constraints of the deployment.
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