Comparisons
How Docker Secret Operator stacks up against other secret management solutions
External Secrets Operator (ESO)
DSO Advantage
✓ Simpler API, CLI-first
Their Advantage
✓ Kubernetes-native, declarative
Verdict: ESO if on Kubernetes
ESO is purpose-built for Kubernetes. DSO is purpose-built for Docker Compose. Choose based on your orchestration platform.
HashiCorp Vault
DSO Advantage
✓ Simpler setup, lighter weight
Their Advantage
✓ More features, audit logging, UI
Verdict: Vault if you need enterprise features
Vault is feature-rich and self-hosted. DSO is a lightweight client. Many teams run DSO with Vault as the backend.
AWS Secrets Manager
DSO Advantage
✓ Multi-provider, portable
Their Advantage
✓ AWS-native, tightly integrated
Verdict: Both, depending on lock-in tolerance
ASM is AWS-only. DSO lets you switch providers or use multiple providers. Neither is strictly 'better'.
Docker Secrets (Swarm)
DSO Advantage
✓ Works with Compose, modern
Their Advantage
✓ Built into Swarm, cluster-aware
Verdict: Docker Secrets in Swarm clusters
Docker Secrets are cluster-scoped (Swarm). DSO is container-scoped (Compose). Different use cases.
Sealed Secrets
DSO Advantage
✓ Simpler, no Kubernetes dependency
Their Advantage
✓ Kubernetes-native, GitOps-ready
Verdict: Sealed Secrets for Kubernetes GitOps
Sealed Secrets are for Kubernetes + GitOps. DSO is for Docker + CLI. Both have their place.
Environment Variables (.env files)
DSO Advantage
✓✓ Secure, zero-persistence, encrypted
Their Advantage
✗ Exposed via docker inspect, logged, not encrypted
Verdict: Always choose DSO over .env files
If you're using .env files, switching to DSO is a strict security upgrade with zero downsides.
Feature Comparison Matrix
| Feature | DSO | ESO | Vault | Sealed Secrets |
|---|---|---|---|---|
| Docker Compose Support | ✓ | ✗ | ✓ | ✗ |
| Kubernetes Support | ✗ | ✓ | ✓ | ✓ |
| Multi-Provider | ✓ | ✓ | ✓ | ✗ |
| Zero-Persistence | ✓ | ✓ | ✓ | ✓ |
| CLI-First | ✓ | ✗ | ✓ | ~ |
| Self-Hosted Option | ✓ | ✓ | ✓ | ✓ |
| Cloud-Native | ~ | ✓ | ~ | ✓ |
| Audit Logging | ~ | ~ | ✓ | ~ |
| Easy Setup | ✓ | ~ | ~ | ✓ |
| Learning Curve | ✓ | ~ | ~ | ✓ |
✓ = Full support, ~ = Partial support, ✗ = Not supported
When to Use DSO
DSO is Perfect For:
- ✓Docker Compose deployments
- ✓Container-first, non-Kubernetes teams
- ✓Multiple cloud providers (no lock-in)
- ✓Development with Local Mode
- ✓CLI-driven operations
- ✓Lightweight secret management
Consider Alternatives If:
- →You're on Kubernetes → Use ESO
- →You need advanced audit logging → Use Vault
- →You're AWS-only → Consider ASM directly
- →You need GitOps integration → Use Sealed Secrets
- →You need a central UI → Use Vault or cloud console
- →You're not using containers → Different tools apply
Decision Tree
Are you using Kubernetes?
→ YES
Use External Secrets Operator (ESO). It's purpose-built for Kubernetes clusters.
→ NO (Docker Compose)
Are you locked into one cloud provider?
→ YES (AWS-only)
Use AWS Secrets Manager directly, or DSO as an abstraction layer.
→ NO (Multi-cloud or flexibility)
Use DSO. It gives you provider flexibility, zero-persistence, and simple CLI workflows.
Ready to choose DSO?
Start with Local Mode for development, then explore cloud integrations when ready for production.