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SPECIFICTION
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Kellnr vs Nexspence

Kellnr

kellnr.io

Nexspence

nexspence.com

Side by side

FigureKellnrNexspence
Price fromFree$5/mo
Free planYesYes
Free trial——
Open source—Yes
WebYesYes
WindowsYesYes
macOSYesYes
LinuxYesYes
APIYesYes
Self-hostedYesYes
Plans published18
Spec score · Artifact repository software8.0 (#29)9.0 (#2)
DeploymentDocumented deployment options include Docker, Kubernetes with Helm, bare metal, Cargo, and the Arch User Repository.Deployment options include Docker Compose, Helm/Kubernetes, and native packages or archives for Linux, macOS, and Windows.
DocumentationKellnr can generate and serve rustdocs for uploaded crates, and supports uploading pre-built rustdocs.The documentation covers installation, high availability, SSO, repositories, format guides, RBAC, webhooks, migration, monitoring, promotion, replication and REST APIs.
Identity integrationsOAuth2/OpenID Connect support includes Authentik, Keycloak, Okta, Azure AD, and other OIDC-compliant providers.Built-in OIDC/OAuth2 SSO supports Keycloak, Google, Microsoft Entra ID and Okta, with JIT provisioning and group-to-role mapping.
SupportThe contact page directs users to GitHub Issues for bugs, feature requests, or questions and GitHub Discussions for community discussion.The project directs users to Telegram for release and setup questions, GitHub issues for bugs and feature requests, and direct maintainer contact for private matters.

Plans

Kellnr

  • Free and open sourceFree

Kellnr pricing →

Nexspence

  • Free foreverFree
  • NexspenceFree
  • Supporter$5 a month
  • Supporter$5 a month
  • Backer$25 a month
  • Backer$25 a month
  • Sponsor$100 a month
  • Sponsor$100 a month

Nexspence pricing →

In their own words

Kellnr

Kellnr has no write-up on Specifiction yet; its figures are above.

Visit kellnr.io

Nexspence

Nexspence is a self-hosted artifact repository manager positioned as a replacement for other artifact repository managers. It supports 15 formats, including Maven, Docker, npm, PyPI, Go Modules, NuGet, Helm, Cargo, Apt, Yum, Conan, Raw, Conda, and Terraform. Hosted, Proxy, and Group repository types are available across formats, with format-specific exceptions. A one-command migration streams repositories, users, and artifacts from a live Nexus instance and is described as pausable and conflict-safe. Storage can use MinIO, AWS S3, Wasabi, or a local filesystem, with per-repository blob-store assignment. Identity options include OIDC/SSO providers, just-in-time provisioning, and group-to-role mapping. Security controls include LDAP, API tokens, JWT, fine-grained RBAC, and SSRF-protected outbound fetches. OSV.dev scanning covers Maven, npm, PyPI, and Cargo; Docker and OCI scanning requires an operator-supplied Trivy installation. Deployment options include Docker Compose, Helm/Kubernetes, and native packages or archives for Linux, macOS, and Windows. Nexspence is free at free and licensed under GNU AGPL v3 or later.

Visit nexspence.com