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Comparison · Infra & APIs

GLAuth vs Skipper

A side-by-side editorial comparison of GLAuth and Skipper — release velocity, themes, recent moves, and the top alternatives to consider.

GLAuth vs Skipper: at a glance

FeatureGLAuthSkipper
SectorInfra & APIsInfra & APIs
Velocity score5.06.3
Sparks · 30d00
Top themesldap, opentelemetry, authentication, embedded-pluginsapi-gateway, http-proxy, rfc9421, performance
Last editorial update1mo ago1h ago
WebsiteVisit →Visit →

What is GLAuth?

A small LDAP server that grew OpenTelemetry tracing, embedded plugins and RISC-V builds.

GLAuth's 2.5.0 in April was the substantial release: OpenTelemetry tracing wired through the handler and plugin packages plus otelsql, embedded plugins, RISC-V platform support, StartTLS and LDAPS brought to feature parity, and LDAP paging compatibility when proxying. The two releases since are corrective — rejecting disabled users on all backends during Bind, an arbitrary-password issue, and a release-time plugin compatibility check.

Read the full GLAuth trajectory →

What is Skipper?

Skipper adds RFC 9421 HTTP Message Signatures and delivers 21% RouteGroup load time improvement

Skipper v0.27 is shipping at a steady maintenance cadence with two functional additions of note: v0.27.96 adds native RFC 9421 HTTP Message Signatures filter support — a 2023 IETF standard for request signing gaining traction in financial services and regulated APIs. v0.27.95 delivers a shared parse cache across RouteGroups, producing a measured 21% load time reduction, 12% lower memory, and 26% fewer allocations on a 200-RouteGroup benchmark.

Read the full Skipper trajectory →

GLAuth vs Skipper: editorial side-by-side

G
GLAuth
INFRA · APIS
5.0

A small LDAP server that grew OpenTelemetry tracing, embedded plugins and RISC-V builds.

◆ Current state

GLAuth's 2.5.0 in April was the substantial release: OpenTelemetry tracing wired through the handler and plugin packages plus otelsql, embedded plugins, RISC-V platform support, StartTLS and LDAPS brought to feature parity, and LDAP paging compatibility when proxying. The two releases since are corrective — rejecting disabled users on all backends during Bind, an arbitrary-password issue, and a release-time plugin compatibility check.

◆ Where it's heading

The direction in 2.5.0 is toward being operable in production rather than merely functional: distributed tracing, a config watcher that notices files added to a directory, credentials no longer leaking at INFO log level, and a legacy behaviour mode so existing deployments can upgrade without changing semantics. The patches since suggest the authentication paths are getting scrutiny they had not previously had, with disabled-user handling inconsistent across backends until 2.5.1 fixed it.

◆ Prediction

Expect the 2.5 line to keep taking small authentication-correctness fixes, with the embedded plugin mechanism and the release-time compatibility check pointing toward more attention on how third-party backends are built and shipped.

S
Skipper
INFRA · APIS
6.3

Skipper adds RFC 9421 HTTP Message Signatures and delivers 21% RouteGroup load time improvement

◆ Current state

Skipper v0.27 is shipping at a steady maintenance cadence with two functional additions of note: v0.27.96 adds native RFC 9421 HTTP Message Signatures filter support — a 2023 IETF standard for request signing gaining traction in financial services and regulated APIs. v0.27.95 delivers a shared parse cache across RouteGroups, producing a measured 21% load time reduction, 12% lower memory, and 26% fewer allocations on a 200-RouteGroup benchmark.

◆ Where it's heading

Skipper is building out its security posture at the proxy layer: RFC 9421 request signing, Redis L2 cache (v0.27.92), and security header handling improvements (v0.27.88) suggest a consistent push toward production-grade security primitives without architectural breaks. The performance improvements in v0.27.95 address real-world Kubernetes clusters where large RouteGroup counts are common.

◆ Prediction

RFC 9421 support will likely get expanded configuration options — signing key rotation, policy enforcement modes, per-route key selection — as Zalando's internal adopters surface operational requirements for the filter.

Alternatives to GLAuth and Skipper

Other Infra & APIs products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either GLAuth or Skipper.

See all GLAuth alternatives → · See all Skipper alternatives →

Recent activity from GLAuth and Skipper

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 5h agoSkipperv0.27.97
  2. 7h agoSkipperSkipper adds native RFC 9421 HTTP Message Signatures filter
  3. 1d agoSkipperCross-RouteGroup parse cache cuts load time 21%, memory 12%
  4. 1d agoSkipperv0.27.94
  5. 1d agoSkipperv0.27.93
  6. 7d agoSkipperSkipper adds Redis as L2 cache storage alongside existing Valkey
  7. 1mo agoGLAuthv2.5.2 checks plugin compatibility at release time
  8. 1mo agoGLAuthv2.5.1 rejects disabled users on every backend during Bind
  9. 4mo agoGLAuthv2.5.0 wires OpenTelemetry tracing through GLAuth end to end

Frequently asked questions

What is the difference between GLAuth and Skipper?

They serve adjacent needs but don't currently overlap on shipped themes. Skipper is currently shipping more aggressively (velocity 6.3 vs 5.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.

Is GLAuth better than Skipper?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Skipper is currently shipping more aggressively (velocity 6.3 vs 5.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.

What are the best alternatives to GLAuth?

Top GLAuth alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "GLAuth alternatives" section above for the current picks, or visit /alternatives/glauth for the full list with editorial commentary on each.

What are the best alternatives to Skipper?

Top Skipper alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Skipper alternatives" section above for the current picks, or visit /alternatives/skipper for the full list with editorial commentary on each.