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Comparison · Infra & APIs

Prometheus Alertmanager vs Dashy

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

Shared themes:security

Prometheus Alertmanager vs Dashy: at a glance

FeaturePrometheus AlertmanagerDashy
SectorInfra & APIsInfra & APIs
Velocity score2.55.0
Sparks · 30d00
Top themesalerting, prometheus, observability, breaking-changesself-hosted, dashboard, homelab, security
Last editorial update4h ago1h ago
WebsiteVisit →Visit →

What is Prometheus Alertmanager?

Alertmanager 0.34.2 turns off CORS by default, breaking cross-origin API calls.

Alertmanager handles deduplication, grouping, silencing and routing of Prometheus alerts. 0.34.2 (October 29) stops sending CORS headers by default, so cross-origin calls to api/v2 now fail unless --web.cors.origin is set, and rebuilds with Go 1.26.10 to distrust the compromised eMudhra intermediates. 0.34.1 fixed inhibitions that could un-mute alerts, and 0.34.0 split auth and rate-limit failures out of the clientError metric reason.

Read the full Prometheus Alertmanager trajectory →

What is Dashy?

Dashy shipped ten releases in five days; one fixes how auth headers trust origins

Dashy ships one release per merged PR. From October 26 to 31 that meant ten releases: six were Dependabot bumps, and the rest were fixes, including accepting IPv6 connections by default, a workspace header and search fix, an icon color fix, and a security fix for auth headers used with lookalike origins.

Read the full Dashy trajectory →

Prometheus Alertmanager vs Dashy: editorial side-by-side

P2.5

Alertmanager 0.34.2 turns off CORS by default, breaking cross-origin API calls.

◆ Current state

Alertmanager handles deduplication, grouping, silencing and routing of Prometheus alerts. 0.34.2 (October 29) stops sending CORS headers by default, so cross-origin calls to api/v2 now fail unless --web.cors.origin is set, and rebuilds with Go 1.26.10 to distrust the compromised eMudhra intermediates. 0.34.1 fixed inhibitions that could un-mute alerts, and 0.34.0 split auth and rate-limit failures out of the clientError metric reason.

◆ Where it's heading

The 0.3x line keeps shipping breaking changes outside major versions: metric reason splits in 0.34.0, per-group markers in 0.33.0 and now a CORS default in a patch. Operators need to read every release note, not just minors.

◆ Prediction

Expect 0.35.0 to carry further breaking changes in the vein of 0.33 and 0.34, though the entries do not say what it will contain.

D
Dashy
INFRA · APIS
5.0

Dashy shipped ten releases in five days; one fixes how auth headers trust origins

◆ Current state

Dashy ships one release per merged PR. From October 26 to 31 that meant ten releases: six were Dependabot bumps, and the rest were fixes, including accepting IPv6 connections by default, a workspace header and search fix, an icon color fix, and a security fix for auth headers used with lookalike origins.

◆ Where it's heading

The cadence stays automated and small-grained, with the maintainer's own fixes interleaved with dependency updates.

◆ Prediction

More single-PR releases will follow; the entries give no sign of a larger feature release.

Alternatives to Prometheus Alertmanager and Dashy

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 Prometheus Alertmanager or Dashy.

See all Prometheus Alertmanager alternatives → · See all Dashy alternatives →

Recent activity from Prometheus Alertmanager and Dashy

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

  1. 1d agoDashyDashy 4.9.12 fixes auth-header trust of lookalike origins
  2. 2d agoDashyDashy 4.9.11 bumps brace-expansion for security
  3. 2d agoDashyDashy 4.9.10 fixes icon color bleeding into text
  4. 3d agoDashyDashy 4.9.9 bundles three dependency updates
  5. 4d agoPrometheus Alertmanager0.34.2: CORS off by default, eMudhra CAs distrusted
  6. 6d agoDashyDashy 4.9.8 fixes workspace header and search
  7. 6d agoDashyDashy 4.9.7 bundles three dependency updates
  8. 1mo agoPrometheus Alertmanager0.34.1: inhibition fixes stop alerts being wrongly un-muted
  9. 2mo agoPrometheus AlertmanagerNotification failure reasons split; templatable route labels added
  10. 4mo agoPrometheus AlertmanagerSilence snapshot legacy matchers field restored
  11. 4mo agoPrometheus AlertmanagerPer-group alert markers replace the global one; event recorder lands ⚡
  12. 4mo agoPrometheus AlertmanagerDispatcher goroutine leak on alertgroup swap fixed

Frequently asked questions

What is the difference between Prometheus Alertmanager and Dashy?

Both compete on the same themes — security — within Infra & APIs. Dashy is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 Prometheus Alertmanager better than Dashy?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Dashy is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 Prometheus Alertmanager?

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

What are the best alternatives to Dashy?

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