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Comparison · Infra & APIs

Knock vs ZoneMinder

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

Knock vs ZoneMinder: at a glance

FeatureKnockZoneMinder
SectorInfra & APIsInfra & APIs
Velocity score6.32.5
Sparks · 30d10
Top themesnotification-infrastructure, data-sources, agent-native, workflow-orchestrationsecurity-hardening, rbac, api-authorization, maintenance-branch
Last editorial update5d ago6h ago
WebsiteVisit →

What is Knock?

Knock is wiring both ends of the messaging data loop, then putting an agent on top

Knock has spent the last month building around its notification engine rather than inside it. Two new inbound data sources, Amplitude and Clay, let product events, cohorts, and enriched account rows land in Knock without customers writing sync code, while message and engagement events flow back out to the warehouse. The dashboard work alongside it, a rebuilt template editor, saved views and tags, schema management, and passkeys, reads as hardening for teams rather than individual developers.

Read the full Knock trajectory →

What is ZoneMinder?

1.38.4 is a security release in all but name, closing ACL gaps across the API.

The 1.38 line is in maintenance, and 1.38.4 is almost entirely authorization work: per-monitor access control enforced on event, frame, zone, tag and media endpoints, two auth bypasses fixed in token validation, and SQL injection and overflow hardening. The 1.36 branch still receives backports, with 1.36.38 carrying its own SQL injection fix. The last feature release was 1.38.0 in February, which brought role-based access control, WebRTC and Go2RTC streaming, and the split of monitor function into separate capturing, analysing, and recording settings.

Read the full ZoneMinder trajectory →

Knock vs ZoneMinder: editorial side-by-side

K
Knock
INFRA · APIS
6.3

Knock is wiring both ends of the messaging data loop, then putting an agent on top

◆ Current state

Knock has spent the last month building around its notification engine rather than inside it. Two new inbound data sources, Amplitude and Clay, let product events, cohorts, and enriched account rows land in Knock without customers writing sync code, while message and engagement events flow back out to the warehouse. The dashboard work alongside it, a rebuilt template editor, saved views and tags, schema management, and passkeys, reads as hardening for teams rather than individual developers.

◆ Where it's heading

The direction is away from a notification API you call and toward the system that holds the messaging state. Ingesting cohort membership and enriched contact data is CDP-adjacent territory, and the wait-for-event function turns linear sequences into event-driven orchestration. The Knock agent then adds a natural-language layer over performance data, so the platform answers questions instead of only exporting rows.

◆ Prediction

Expect more data sources on the same pattern, warehouse and CRM-side connectors that keep audiences in sync without customer glue code. Whether the agent moves from reading analytics to editing workflows directly is the open question these entries do not yet answer.

Z
ZoneMinder
INFRA · APIS
2.5

1.38.4 is a security release in all but name, closing ACL gaps across the API.

◆ Current state

The 1.38 line is in maintenance, and 1.38.4 is almost entirely authorization work: per-monitor access control enforced on event, frame, zone, tag and media endpoints, two auth bypasses fixed in token validation, and SQL injection and overflow hardening. The 1.36 branch still receives backports, with 1.36.38 carrying its own SQL injection fix. The last feature release was 1.38.0 in February, which brought role-based access control, WebRTC and Go2RTC streaming, and the split of monitor function into separate capturing, analysing, and recording settings.

◆ Where it's heading

Every release since 1.38.0 has been consolidation of what that release opened up. RBAC shipped as a headline feature in February, and the four maintenance drops since have been finding the endpoints it did not cover — the familiar pattern when a permission model is retrofitted onto an API that predates it. Cadence is slow and irregular, months apart, with a 1.39 spec bump already visible in the repo but nothing from that series shipped.

◆ Prediction

Expect more per-endpoint ACL fixes on the 1.38 line before anything from 1.39 reaches release.

Alternatives to Knock and ZoneMinder

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 Knock or ZoneMinder.

See all Knock alternatives → · See all ZoneMinder alternatives →

Recent activity from Knock and ZoneMinder

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

  1. 1d agoZoneMinder1.38.4 closes API ACL gaps and two auth bypasses
  2. 6d agoKnockAmplitude data source
  3. 13d agoKnockAnalytics in the Knock agent
  4. 14d agoKnockWait for event function
  5. 15d agoKnockClay data source
  6. 20d agoKnockRedesigned template editor
  7. 27d agoKnockBranch rebasing
  8. 2mo agoZoneMinder1.38.3 supersedes 1.38.2 with RBAC and injection fixes
  9. 2mo agoZoneMinderchore: bump redhat spec version to 1.39.11
  10. 5mo agoZoneMinder1.36.38 backports a SQL injection fix to the legacy branch
  11. 5mo agoZoneMinder1.38.1 unifies four ONVIF control modules into one
  12. 6mo agoZoneMinder1.38.0 adds RBAC, WebRTC streaming, and a monitor function split

Frequently asked questions

What is the difference between Knock and ZoneMinder?

They serve adjacent needs but don't currently overlap on shipped themes. Knock is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 Knock better than ZoneMinder?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Knock is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 Knock?

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

What are the best alternatives to ZoneMinder?

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