Do I need Kubernetes for multi cloud portability?

Not necessarily.

Kubernetes can help with multi-cloud portability, but it does not guarantee it.
Whether you need it depends on what you want to make portable.

When Kubernetes helps

Kubernetes is useful if you want to port:

• Containerized apps
• Deployment patterns across cloud providers
• Scaling, service discovery, config, and rollout workflows
• Some infrastructure assumptions via standardized APIs

It’s often a good choice if your goal is:

• Run the same app on AWS, Azure, GCP, or on-prem
• Avoid tying your app to one provider’s container service
• Standardize how teams deploy across environments

When Kubernetes is not enough

Even with Kubernetes, you can still get locked in by:

• Managed databases like RDS, Cloud SQL, Cosmos DB
• Cloud-specific networking or identity services
• Storage classes, load balancers, secrets managers
• Observability tools and IAM integrations
• Serverless functions or proprietary messaging services

So the app may be portable, but the surrounding platform may not be.

When you might not need Kubernetes

If your application is:

• Small or simple
• Mostly stateless
• Deployed as a few services or functions
• Better served by platform-managed services

then Kubernetes may add unnecessary complexity. In that case, portability might be better achieved with:

• Containers without Kubernetes
• Terraform / OpenTofu for infrastructure
• 12-factor app design
• Portable data layers and abstraction around cloud services

Practical rule of thumb

Use Kubernetes if you need:

• Consistent deployment across clouds
• A large microservices platform
• Strong operational standardization

Skip it if:

• You mainly want to avoid one or two cloud-specific services
• Simplicity matters more than portability
• Your workload fits managed app platforms well

Bottom line

Kubernetes is a portability tool, not a portability requirement.
It can reduce cloud coupling, but true multi-cloud portability also depends on your app architecture, data layer, and use of cloud-specific services.

If you want, I can give you a decision matrix for “Kubernetes vs. no Kubernetes” for multi-cloud.