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Comparison · DevOps
NSD vs Prometheus
A side-by-side editorial comparison of NSD and Prometheus — release velocity, themes, recent moves, and the top alternatives to consider.
NSD vs Prometheus: at a glance
What is NSD?
NSD's 4.15 line is being shaped by outside researchers' bug reports.
NLnet Labs shipped two NSD releases in October. 4.15.3 fixed four CVEs in the simdzone zone-file parser that only crafted zone files can trigger, a risk mainly for multi-tenant setups where third parties feed zone data. 4.15.4 adds a report-channel EDNS option, a catalog-group-pattern setting that limits which patterns catalog member zones may use, and the UNECE and ISO record types, alongside a long list of fixes credited to researchers at Palo Alto Networks and Tsinghua University.
What is Prometheus?
Prometheus 3.16 turns query cost into a setting while its smoothed selectors go stable
Prometheus is working toward 3.16, with rc.2 dated 27 October. The candidate makes Smoothed and Anchored vector selectors stable and always-on, adds experimental query cost estimation with configurable execution limits behind --enable-feature=query-cost, and brings metadata-wal-records to Agent mode. The patch tracks are moving separately: 3.15.1 and 3.13.5 both distrust two root CAs after the eMudhra key compromise and rebuild on patched Go releases.
NSD vs Prometheus: editorial side-by-side
NSD
5.0DEVOPS
NSD's 4.15 line is being shaped by outside researchers' bug reports.
◆ Current state
NLnet Labs shipped two NSD releases in October. 4.15.3 fixed four CVEs in the simdzone zone-file parser that only crafted zone files can trigger, a risk mainly for multi-tenant setups where third parties feed zone data. 4.15.4 adds a report-channel EDNS option, a catalog-group-pattern setting that limits which patterns catalog member zones may use, and the UNECE and ISO record types, alongside a long list of fixes credited to researchers at Palo Alto Networks and Tsinghua University.
◆ Where it's heading
Most of the 4.15 cycle is reactive: four security or bug-fix releases since August, with outside researchers finding parser overflows, crashes on malformed catalog zones and IXFR edge cases. Features still arrive, and at least one, catalog-group-pattern, was suggested by a researcher who also reported bugs. Catalog zones and zone-file parsing are where the attention is concentrated.
◆ Prediction
Expect more fixes in catalog zone and zone-file parsing as outside fuzzing continues, likely in another 4.15 patch. The entries give no sign of a 4.16 feature release.
Prometheus
5.0DEVOPS
Prometheus 3.16 turns query cost into a setting while its smoothed selectors go stable
◆ Current state
Prometheus is working toward 3.16, with rc.2 dated 27 October. The candidate makes Smoothed and Anchored vector selectors stable and always-on, adds experimental query cost estimation with configurable execution limits behind --enable-feature=query-cost, and brings metadata-wal-records to Agent mode. The patch tracks are moving separately: 3.15.1 and 3.13.5 both distrust two root CAs after the eMudhra key compromise and rebuild on patched Go releases.
◆ Where it's heading
The 3.16 notes spend most of their length on correctness and cost rather than new surface: TSDB out-of-order sample loss, exemplar handling in OTLP and OpenMetrics 2.0, and a long list of parser and memory reductions. Query cost limits are the one addition aimed at operators of shared servers, since a limit on execution is a control that sample counts alone never gave them. Start-timestamp handling also keeps widening, now with a per-query header and counter-reset detection on anchored and smoothed selectors, though it stays behind its feature flag.
◆ Prediction
A 3.16.0 final is the next move, given this candidate has reached rc.2. Query cost and start-timestamp handling both remain behind flags in these notes, so expect feedback on those before either becomes a default.
Alternatives to NSD and Prometheus
Other DevOps 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 NSD or Prometheus.
Nominatim
Nominatim 5.3.3 turns off its debug view by default because it can leak server details.
GraphHopper
GraphHopper 11.1 is a security release, and 12.0 prerelease tags have started.
Apache Syncope
Syncope runs two IAM branches in lockstep, but ships announcements with no change detail.
RaspAP
RaspAP folded its Insiders-only features into the open release, then rebuilt its VPN handling.
Exoscale
Exoscale is filling in cloud basics: VPC, lifecycle rules and cheaper IPv6 load balancing.
See all NSD alternatives → · See all Prometheus alternatives →
Recent activity from NSD and Prometheus
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 4d agoPrometheus3.16.0-rc.2: query cost limits, smoothed selectors go stable
- 11d agoPrometheus3.15.1: distrusts two root CAs, patches Go and HTTP/2
- 11d agoPrometheus3.13.5: LTS gets the CA distrust and Go security rebuild
- 12d agoNSDNSD 4.15.4 released
- 18d agoNSDNSD 4.15.4rc1 pre-release
- 18d agoNSDNSD 4.15.3 security release
- 1mo agoPrometheus3.13.4: gRPC fix, native histogram corrections on LTS
- 1mo agoPrometheus3.13.3 / 2026-09-07
- 1mo agoNSDNSD 4.15.2 released
- 2mo agoNSDNSD 4.15.2 release candidate
- 2mo agoNSDNSD 4.15.1 security release: four CVEs fixed
- 2mo agoPrometheus3.14.0 / 2026-08-17
Frequently asked questions
What is the difference between NSD and Prometheus?
They serve adjacent needs but don't currently overlap on shipped themes. NSD and Prometheus are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is NSD better than Prometheus?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. NSD and Prometheus are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
What are the best alternatives to NSD?
Top NSD alternatives in DevOps are ranked by recent ship velocity. Browse the "NSD alternatives" section above for the current picks, or visit /alternatives/nsd for the full list with editorial commentary on each.
What are the best alternatives to Prometheus?
Top Prometheus alternatives in DevOps are ranked by recent ship velocity. Browse the "Prometheus alternatives" section above for the current picks, or visit /alternatives/prometheus for the full list with editorial commentary on each.