Best for dynamic secrets and credential rotation
Try HashiCorp VaultHashiCorp Vault is the enterprise-proven platform for dynamic secrets: short-lived database credentials, dynamically minted AWS access keys, PKI certificates rotated per request. Vault OSS (BSL licensed since 2024) is free for self-hosting with limits; HCP Vault (managed) starts at $0.03 per client per hour. For teams whose pain point is long-lived credentials sitting in env vars, Vault generates per-request credentials that expire in minutes. The trade vs Doppler: dramatically more operational complexity, Vault Operator certifications expected on enterprise teams.
Strengths
- +Dynamic secrets (DB credentials, AWS keys, PKI) that expire in minutes
- +Most enterprise-proven platform in this category
- +OSS self-hosted option for full control
- +HCP Vault for managed without ops overhead
Trade-offs
- −Steep learning curve (Vault Operator role exists for a reason)
- −BSL license replaces MPL since 2024 (commercial-use limits)
- −HCP Vault per-client-hour pricing harder to predict than per-user
- OSS
- BSL, self-hosted
- HCP Vault
- $0.03 per client/hour
- Enterprise
- Custom (~$50K+/yr)
- Dynamic secrets
- DB, AWS, PKI, SSH
Migration steps
- Self-host Vault via Helm or sign up for HCP Vault.
- Configure auth method (AppRole, K8s, IAM).
- Migrate static secrets from Doppler via Vault CLI import.
- Roll out dynamic secrets engines (database, AWS) gradually; cancel Doppler once stable.
Not for: Vault is the wrong fit for small teams that only need static API key storage; Doppler or Infisical fit that better at lower complexity.