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Comparison · DevOps
Prometheus vs QuestDB
A side-by-side editorial comparison of Prometheus and QuestDB — release velocity, themes, recent moves, and the top alternatives to consider.
Prometheus vs QuestDB: at a glance
What is Prometheus?
Prometheus 3.16 reaches rc.4 with an integral() function and stricter exemplar handling
Prometheus 3.16 is on its fourth release candidate, dated 3 November. Beyond rc.2's stable Smoothed and Anchored selectors and flag-gated query cost limits, rc.4 adds an experimental integral() PromQL function, per-query start-timestamp overrides via an HTTP header, and metadata-wal-records in Agent mode. It also tightens accounting: subquery samples now count toward query statistics, and exemplars with duplicate label names are rejected.
What is QuestDB?
QuestDB keeps proving its market-data case with reproducible benchmarks between releases.
QuestDB 10.1 and Enterprise 4.1 are the October product releases: merge-append partitions for late data, SUBSAMPLE and exact percentiles, then resource groups, audited views and OIDC for shared clusters. The newest entry is a benchmark rather than a release, replaying 354 million top-of-book events for a full US equities day as Arrow, with memory and throughput figures and rerunnable code. The rest of the feed is technical content on joins, Parquet and QWP compression.
Prometheus vs QuestDB: editorial side-by-side
Prometheus
5.0DEVOPS
Prometheus 3.16 reaches rc.4 with an integral() function and stricter exemplar handling
◆ Current state
Prometheus 3.16 is on its fourth release candidate, dated 3 November. Beyond rc.2's stable Smoothed and Anchored selectors and flag-gated query cost limits, rc.4 adds an experimental integral() PromQL function, per-query start-timestamp overrides via an HTTP header, and metadata-wal-records in Agent mode. It also tightens accounting: subquery samples now count toward query statistics, and exemplars with duplicate label names are rejected.
◆ Where it's heading
The 3.16 cycle is about making query cost measurable and controllable: accurate sample counts are a prerequisite for the cost limits rc.2 introduced. Remote Write 2.0 keeps shedding legacy metadata metrics, and the patch tracks (3.15.x, 3.13 LTS) keep moving separately on security rebuilds.
◆ Prediction
A 3.16.0 GA is the likely next entry, given four candidates in about a week; whether query-cost leaves its feature flag in that release is not yet visible.
QuestDB
5.0DEVOPS
QuestDB keeps proving its market-data case with reproducible benchmarks between releases.
◆ Current state
QuestDB 10.1 and Enterprise 4.1 are the October product releases: merge-append partitions for late data, SUBSAMPLE and exact percentiles, then resource groups, audited views and OIDC for shared clusters. The newest entry is a benchmark rather than a release, replaying 354 million top-of-book events for a full US equities day as Arrow, with memory and throughput figures and rerunnable code. The rest of the feed is technical content on joins, Parquet and QWP compression.
◆ Where it's heading
The release work and the content point the same way: QuestDB as the shared store for trading data, read by many teams and many engines. Enterprise features govern how a cluster is shared, while the posts show the data leaving QuestDB through Parquet and Arrow at volume.
◆ Prediction
Expect the next release to target read-out paths such as Arrow streaming or Parquet export, since the benchmarks are already measuring them; the entries do not show a date.
Alternatives to Prometheus and QuestDB
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 Prometheus or QuestDB.
HashiCorp
HashiCorp is rebuilding Terraform and Vault around AI agents as governed users
Elasticsearch
One Node.js Brotli bug and a compromised CA bundle force ten patches across the Elastic Stack.
Grav
Grav's 1.7 line keeps taking small patches after its security backport burst.
Z-Wave JS
Z-Wave JS v15.32.0 ships the findings of two full-codebase security reviews.
Sanity
Sanity moves agent settings onto the MCP endpoint, so every connected agent behaves alike.
See all Prometheus alternatives → · See all QuestDB alternatives →
Recent activity from Prometheus and QuestDB
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 21h agoQuestDBMarket data replay for backtesting: a full day of US equities from QuestDB
- 1d agoPrometheus3.16.0-rc.4: integral() function, stricter sample accounting
- 6d agoQuestDBOne table, three readers: QuestDB, Polars and DuckDB on the same Parquet
- 7d agoPrometheus3.16.0-rc.2: query cost limits, smoothed selectors go stable
- 8d agoQuestDBQuestDB Enterprise 4.1: governance for shared clusters
- 12d agoQuestDBQuestDB 10.1: less I/O for late data, and more analysis in SQL
- 13d agoQuestDBIngesting live market data from Databento into QuestDB
- 14d agoPrometheus3.15.1: distrusts two root CAs, patches Go and HTTP/2
- 14d agoPrometheus3.13.5: LTS gets the CA distrust and Go security rebuild
- 1mo agoPrometheus3.13.4: gRPC fix, native histogram corrections on LTS
- 1mo agoQuestDBQuestDB's QWP under the hood: Gorilla timestamp compression
- 1mo agoPrometheus3.13.3 / 2026-09-07
Frequently asked questions
What is the difference between Prometheus and QuestDB?
They serve adjacent needs but don't currently overlap on shipped themes. Prometheus and QuestDB 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 Prometheus better than QuestDB?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Prometheus and QuestDB 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 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.
What are the best alternatives to QuestDB?
Top QuestDB alternatives in DevOps are ranked by recent ship velocity. Browse the "QuestDB alternatives" section above for the current picks, or visit /alternatives/questdb for the full list with editorial commentary on each.