HashiCorp VaultvsAWS Secrets Manager
A detailed comparison of HashiCorp Vault and AWS Secrets Manager for secrets management and data protection. Covers dynamic secrets, encryption, access control, multi-cloud support, and operational complexity to help you choose the right secrets solution.
HashiCorp Vault
A secrets management and data protection platform that provides dynamic secrets, encryption as a service, PKI management, and identity-based access control. Runs self-hosted, on Kubernetes, or as a managed service via HCP Vault.
Visit websiteAWS Secrets Manager
A fully managed AWS service for storing, retrieving, and rotating secrets. Integrates natively with RDS, Redshift, DocumentDB, and other AWS services. Uses IAM for access control and KMS for encryption.
Visit websiteHardcoded secrets in source code, plaintext credentials in config files, shared passwords in Slack - if any of these sound familiar, you need a secrets management solution. The two most common choices in 2026 are HashiCorp Vault and AWS Secrets Manager, and they solve the problem at very different levels of ambition.
HashiCorp Vault is a full-featured secrets management and data protection platform. It goes far beyond storing key-value pairs - it generates dynamic, short-lived credentials for databases and cloud providers, handles encryption as a service, manages PKI certificates, provides SSH certificate signing, and supports OIDC-based authentication. Vault is cloud-agnostic and runs anywhere: self-hosted, on Kubernetes via the Vault Helm chart, or as a managed service through HCP Vault. The trade-off is operational complexity. Running Vault in production requires understanding unsealing, storage backends, HA configurations, and audit logging.
AWS Secrets Manager is a managed service that stores and rotates secrets with tight integration into the AWS ecosystem. It does one thing well: you put secrets in, you get secrets out, and it can automatically rotate credentials for RDS, Redshift, and DocumentDB. There is no infrastructure to manage, no unsealing ceremony, and no HA to configure. IAM policies control who can access what. For teams running entirely on AWS, it removes nearly all the operational burden of secrets management.
The gap between these tools is not just about features - it is about what kind of problem you are solving. If you need a centralized secrets platform that works across AWS, GCP, Azure, on-prem data centers, and Kubernetes clusters, Vault is the only realistic option. If you need to store API keys and database passwords for an AWS-native application and want zero operational overhead, Secrets Manager gets the job done with minimal fuss.
This comparison covers the key differences across dynamic secrets, encryption, access control, multi-cloud support, pricing, and operational complexity. We aim to help you decide which tool fits your team's security requirements and operational capacity.
Feature Comparison
| Feature | HashiCorp Vault | AWS Secrets Manager |
|---|---|---|
| Secrets Management | ||
| Dynamic Secrets | Generates short-lived credentials on demand for databases, AWS, GCP, Azure, SSH, and more | No dynamic secret generation; stores static secrets with optional scheduled rotation |
| Secret Rotation | Dynamic secrets expire by TTL; static secrets rotated via policies or external triggers | Built-in rotation for RDS/Redshift/DocumentDB; custom Lambda for other services |
| Data Protection | ||
| Encryption as a Service | Transit engine encrypts/decrypts data without exposing keys; supports key rotation and versioning | Not available; use AWS KMS separately for encryption operations |
| PKI / Certificate Management | Full PKI engine for issuing, renewing, and revoking TLS certificates | Not available; use AWS Certificate Manager (ACM) separately |
| Access Control | ||
| Access Control Model | Path-based ACL policies, namespaces, Sentinel policy engine (Enterprise) | IAM policies, resource-based policies, tag-based access control |
| Authentication Methods | OIDC, LDAP, Kubernetes service accounts, AWS IAM, GitHub, AppRole, tokens, and more | AWS IAM roles and users only |
| Platform Support | ||
| Multi-Cloud Support | Works across AWS, GCP, Azure, on-prem, and Kubernetes; cloud-agnostic by design | AWS only; cross-region replication within AWS |
| Kubernetes Integration | Vault Agent sidecar, CSI driver, Vault Secrets Operator for native K8s secret sync | External Secrets Operator or ASCP (AWS Secrets and Config Provider) for CSI driver |
| Operations | ||
| Operational Complexity | High - requires unsealing, storage backend management, HA configuration, monitoring | Zero - fully managed service with no infrastructure to operate |
| Audit Logging | Detailed audit logs with request/response data for every operation | CloudTrail integration for API call logging |
| Cost | ||
| Pricing Model | Open-source (self-hosted) is free; HCP Vault starts at ~$0.03/hr per cluster | $0.40/secret/month + $0.05 per 10,000 API calls; no upfront cost |
| Reliability | ||
| High Availability | Integrated storage (Raft) or Consul for HA; requires configuration and monitoring | Built-in HA across multiple AZs; AWS manages all redundancy |
Secrets Management
Data Protection
Access Control
Platform Support
Operations
Cost
Reliability
Pros and Cons
Strengths
- Dynamic secrets with automatic TTL-based expiration for databases, cloud providers, and more
- Encryption as a service (Transit engine) - encrypt data without managing keys yourself
- PKI engine generates and manages TLS certificates automatically
- Cloud-agnostic - works across AWS, GCP, Azure, on-prem, and Kubernetes
- Fine-grained ACL policies with path-based access control and namespaces
- Extensive auth methods: OIDC, LDAP, Kubernetes, AWS IAM, GitHub, and more
- Open-source community edition available (BSL license since 2023)
Weaknesses
- Significant operational complexity - unsealing, storage backends, HA setup, upgrades
- Steep learning curve for teams new to secrets management
- Self-hosted Vault requires dedicated infrastructure and on-call expertise
- HCP Vault (managed) reduces ops burden but adds cost and has feature limitations
- BSL license change in 2023 limits competitive use; OpenBao is the community fork
- Performance tuning required at scale - token renewal storms can be painful
Strengths
- Fully managed - zero infrastructure to operate, no unsealing, no HA configuration
- Native integration with RDS, Redshift, DocumentDB for automatic credential rotation
- IAM-based access control uses your existing AWS permissions model
- Encrypted at rest with KMS (customer-managed or AWS-managed keys)
- Cross-region secret replication for disaster recovery
- Simple API and SDK support in every AWS SDK language
Weaknesses
- AWS-only - no support for GCP, Azure, or on-prem secrets management
- No dynamic secrets generation - only static secrets with scheduled rotation
- Limited to key-value storage; no encryption as a service or PKI
- Costs $0.40 per secret per month plus $0.05 per 10,000 API calls - adds up with many secrets
- Rotation Lambda functions for non-RDS services require custom code
- No fine-grained path-based policies - IAM policies can be complex for granular access
Decision Matrix
Pick this if...
Your infrastructure spans multiple cloud providers or includes on-prem
You run entirely on AWS and want minimal operational overhead
You need dynamic, short-lived database credentials
You need automatic RDS credential rotation with zero custom code
You need encryption as a service for application-layer data protection
Your team does not have capacity to operate additional infrastructure
You need PKI and TLS certificate management
You have fewer than 100 secrets and simple access patterns
Use Cases
Multi-cloud organization running workloads on AWS, GCP, and Azure that needs centralized secrets
Vault is the only option here. AWS Secrets Manager is AWS-only. Vault provides a single control plane for secrets across all clouds, with native auth methods for each cloud provider's identity system.
AWS-native startup with 10 engineers that needs to store API keys and database credentials
AWS Secrets Manager is the pragmatic choice. Zero operational overhead, native RDS integration for credential rotation, and IAM-based access control that your team already understands. Running Vault for this use case would be over-engineering it.
Security team implementing zero-trust with short-lived database credentials and automatic revocation
Vault's dynamic secrets engine generates database credentials with a TTL of minutes or hours, and they are automatically revoked when the lease expires. This eliminates long-lived credentials entirely - something Secrets Manager cannot do.
Platform team needing to issue and manage internal TLS certificates for service-to-service communication
Vault's PKI engine can act as an intermediate CA, issuing short-lived TLS certificates to services automatically. Combined with the Vault Agent or CSI driver, certificates are injected into pods and rotated before expiry. Secrets Manager has no PKI capability.
DevOps team managing secrets for 200+ microservices on EKS that wants minimal operational burden
Using Secrets Manager with the External Secrets Operator or ASCP syncs secrets into Kubernetes without running Vault infrastructure. For AWS-native K8s workloads where dynamic secrets are not required, this is significantly less operational work.
Application team needing to encrypt sensitive data at the application layer without managing encryption keys
Vault's Transit engine lets applications encrypt and decrypt data via API calls without ever handling raw encryption keys. This is useful for encrypting PII, payment data, or health records at the application level while keeping key management centralized.
Verdict
HashiCorp Vault is the more powerful tool by a wide margin, but that power comes with real operational cost. AWS Secrets Manager is the right choice for AWS-native teams with straightforward secrets storage needs who want zero ops burden. Vault is essential for multi-cloud environments, dynamic secrets, PKI, and encryption as a service. The decision comes down to whether your security needs justify the operational investment.
Our Recommendation
Choose Vault if you need dynamic secrets, multi-cloud support, PKI, or encryption as a service. Choose AWS Secrets Manager if you are AWS-only and want simple, managed secret storage with native service integration.
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