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SikkerKey

sikkerkey.com

From $29/mo Free plan WebWindowsmacOSLinuxAPI
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Spec score 8.0 #14 of 46 in Secrets Management Tools

What it is

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.

Spec sheet

Product
SikkerKey is a secrets manager and vault for application and infrastructure credentials.Read 30 Sep 2026 · sikkerkey.com
Integrations
SikkerKey integrates through its CLI, SDKs or signed HTTP with CI/CD, containers, app platforms, serverless functions, servers and on-premise systems.Read 30 Sep 2026 · sikkerkey.com
Compliance
The service processes data in the EEA and states that GDPR safeguards apply to its processing and transfers.Read 30 Sep 2026 · sikkerkey.com
Support
Direct in-dashboard support is included on every plan.Read 30 Sep 2026 · sikkerkey.com
Headquarters
DenmarkRead 28 Sep 2026 · sikkerkey.com
AI access
Its MCP server gives AI agents a separate identity class that cannot retrieve plaintext secret values.Read 30 Sep 2026 · docs.sikkerkey.com
CLI platforms
The packaged CLI supports Linux x64 and ARM64, macOS Intel and Apple Silicon, and Windows x64.Read 30 Sep 2026 · sikkerkey.com
Encryption
Secrets use three-layer envelope encryption with per-secret AES-256-GCM data keys, per-project master keys and a separate root key.Read 30 Sep 2026 · docs.sikkerkey.com
EU hosting
SikkerKey says its vault, secrets and audit trail stay in the European Union and are operated from Denmark.Read 30 Sep 2026 · sikkerkey.com
Machine authentication
Machines authenticate by signing each request with an Ed25519 private key that remains on the host.Read 30 Sep 2026 · docs.sikkerkey.com
SDKs
Official SDKs are available for Go, Python, Node.js, .NET, Kotlin and PHP.Read 30 Sep 2026 · sikkerkey.com
Secret types
The platform supports standard, structured, managed, leased, certificate, canary and TTL secrets.Read 30 Sep 2026 · sikkerkey.com
Target users
The service is designed for software engineers, DevOps teams and organizations managing application secrets.Read 30 Sep 2026 · sikkerkey.com
Usage limits
Secret count, project count, read volume and rotation frequency are unlimited on every plan.Read 30 Sep 2026 · sikkerkey.com

Plans and prices

Developer Free 10 machines included · 1 month audit retention · 20 webhook deliveries/day · +$5 per additional machine/month Read 30 Sep 2026 · sikkerkey.com
Teams $29 a month monthly 25 machines included · 12 months audit retention · 1,000 webhook deliveries/day · +$4 per additional machine/month · 5 private-infrastructure tunnels Read 30 Sep 2026 · sikkerkey.com
Teams Pro $79 a month monthly 75 machines included · 24 months audit retention · 5,000 webhook deliveries/day · +$3 per additional machine/month · 10 private-infrastructure tunnels Read 30 Sep 2026 · sikkerkey.com

Every SikkerKey plan and price →

Strong points and limits

Strong points

  • Supports a wide range of secret types.
  • Integrates with CI/CD and infrastructure systems.
  • Official SDKs cover six languages.
  • Direct in-dashboard support on every plan.
  • Secret, project, read, and rotation counts are unlimited.

Limits

  • Developer plan includes 10 machines.
  • Additional Developer machines cost $5 per month each.
  • Teams plan includes 25 machines.
  • Cloud deployment model.

Who it suits

SikkerKey is aimed at software engineers, DevOps teams, and organizations managing application secrets. It may suit teams connecting credentials to development and infrastructure systems, including those that need SDK or CLI access.

Verdict

SikkerKey combines credential storage with machine authentication, integrations, and audit logs. Compare machine allowances, retention, webhook limits, and tunnel counts across plans before selecting one.

Where Specifiction places it

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