The Short Answer
Cloud Run if you have stateless HTTP services and don't want to manage infrastructure. GKE if you have complex multi-service architectures, stateful workloads, GPU requirements, or specific networking needs. Most organisations actually need both.
Cloud Run — When to Use It
- Stateless HTTP APIs or microservices
- Event-driven workloads triggered by Pub/Sub, Cloud Storage, or Eventarc
- Variable or spiky traffic (scales to zero, scales to thousands instantly)
- Small teams who don't want Kubernetes operational overhead
- Rapid prototyping and internal tools
Pricing: Pay per request + CPU/memory while handling requests. True scale-to-zero means $0 when idle.
GKE — When to Use It
- Stateful workloads (databases, message brokers running in cluster)
- GPU/TPU workloads for ML inference or training
- Complex service meshes requiring Istio or Anthos Service Mesh
- Workloads requiring fine-grained scheduling (node affinity, taints, tolerations)
- Organisations already invested in Kubernetes tooling and expertise
- Multi-cloud or hybrid requirements (Anthos)
Pricing: Pay for nodes (VMs) regardless of utilisation. GKE Autopilot charges per pod resource requests — closer to Cloud Run economics but with more control.
The Decision Matrix
| Factor | Cloud Run | GKE |
|---|---|---|
| Operational overhead | Very low | Medium–High |
| Cold start latency | ~200ms–2s | None (pods always warm) |
| Scale to zero | ✓ Native | Only with KEDA + extra config |
| GPU support | ✗ | ✓ |
| Stateful workloads | Limited (Cloud Run Jobs) | ✓ |
| Min baseline cost | $0 | ~$70/mo (GKE Autopilot minimum) |
My Recommended Starting Point
For most startups and SMBs: start with Cloud Run for all new services. Introduce GKE only when you have a concrete need it can't meet. GKE Autopilot is a good middle-ground if you're ready for Kubernetes but not ready to manage nodes.
Not sure which fits your workload? Let's talk through it.
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