Secrets Manager vs SikkerKey
Secrets Manager
github.com
SikkerKey
sikkerkey.comSide by side
| Figure | Secrets Manager | SikkerKey |
|---|---|---|
| Price from | Free | $29/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 3 |
| Spec score · Secrets Management Tools | 8.3 (#7) | 8.0 (#14) |
| Encryption | The backend uses AES-256-GCM envelope encryption with a random data key per secret value, and the documentation says plaintext secret values are never stored in the database. | Secrets use three-layer envelope encryption with per-secret AES-256-GCM data keys, per-project master keys and a separate root key. |
| Integrations | The documented CLI workflow uses Node.js and shows app commands for Node.js, Python, npm, and Next.js; CI or deployment can use `SECRETS_API_URL`, `SECRETS_TOKEN`, and `ENVIRONMENT_ID`. | SikkerKey integrates through its CLI, SDKs or signed HTTP with CI/CD, containers, app platforms, serverless functions, servers and on-premise systems. |
| Support | The repository directs vulnerability reports to a private GitHub security advisory and says not to disclose exploitable issues publicly. | Direct in-dashboard support is included on every plan. |
Plans
In their own words
Secrets Manager
Secrets Manager is a free, open-source, self-hosted system for storing application secrets in encrypted form, managing them through a web interface, and injecting them into processes with a command-line tool. Users organize secrets by organization, project, and environment, import.env files, edit or reveal values, keep versions, roll back, and soft-delete entries. The `secrets run` command supplies environment secrets to a child process and its descendants without creating a.env file. Documented workflows cover Node.js, Python, npm, and Next.js; CI or deployment can use an API URL, token, and environment ID. User and service-account grants can be scoped to projects or environments, and revealing values requires explicit permission. AES-256-GCM envelope encryption uses a separate data key per value, while plaintext values are not stored in the database. Audit events include secret reveals, and values are withheld if audit writing fails. Docker Compose starts PostgreSQL, Redis, backend, and frontend; local Kubernetes manifests are also provided. A user-generated master key is mandatory and lost keys make secrets unrecoverable. The repository is MIT licensed.
SikkerKey
SikkerKey is a secrets manager and vault for application and infrastructure credentials. It supports standard, structured, managed, leased, certificate, canary, and TTL secrets, as well as secret rotation and dynamic secrets. Machines authenticate by signing each request with an Ed25519 private key that stays on the host. Teams can connect it to CI/CD, containers, app platforms, serverless functions, servers, and on-premise systems through its CLI, SDKs, or signed HTTP. Official SDKs are available for Go, Python, Node.js,.NET, Kotlin, and PHP. Its CLI supports Linux x64 and ARM64, macOS Intel and Apple Silicon, and Windows x64. The service describes a three-layer encryption design; its MCP server gives AI agents a separate identity class that cannot retrieve plaintext secret values. SikkerKey says its vault, secrets, and audit trail stay in the EU and are operated from Denmark. The free Developer plan is free and includes 10 machines; paid plans start at $29/mo. Every plan includes direct in-dashboard support and unlimited secret, project, read-volume, and rotation counts.