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Comparison · Analytics
Apache Druid vs Calibre
A side-by-side editorial comparison of Apache Druid and Calibre — release velocity, themes, recent moves, and the top alternatives to consider.
Apache Druid vs Calibre: at a glance
What is Apache Druid?
Druid 38 drops Java 17, recommends Java 25 and took longer to arrive than its predecessors
Druid 38.0.0 shipped on October 1 with over 250 changes from 37 contributors. It adds Java 25 support, drops Java 17, and introduces Historical tier aliases and a realtimeSegmentsMode query context that replaces realtimeSegmentsOnly. MSQ workers now fetch input files in the background by default, and Druid 38 is the last major that reads legacy ZSTD frames.
What is Calibre?
Lighthouse 13.6 shifts Calibre's scores and adds audits for how AI agents read your pages
Calibre's Test Agents moved to Chrome 156 and Lighthouse 13.6.0, which fixes how simulated throttling calculates LCP and FCP, so scores on PageSpeed Desktop and PageSpeed Mobile Test Profiles should mostly improve with no site change. Snapshots also gained Lighthouse's Agentic Browsing audits, covering the accessibility tree, WebMCP, llms.txt and ARD manifests, a category Google marks as under development. In September the free Core Web Vitals Test added four experimental CrUX ad metrics. August's work attached deployment markers to RUM charts and added all-pages Synthetic aggregates.
Apache Druid vs Calibre: editorial side-by-side
Apache Druid
0.0ANALYTICSINFRA · APIS
Druid 38 drops Java 17, recommends Java 25 and took longer to arrive than its predecessors
◆ Current state
Druid 38.0.0 shipped on October 1 with over 250 changes from 37 contributors. It adds Java 25 support, drops Java 17, and introduces Historical tier aliases and a realtimeSegmentsMode query context that replaces realtimeSegmentsOnly. MSQ workers now fetch input files in the background by default, and Druid 38 is the last major that reads legacy ZSTD frames.
◆ Where it's heading
The release is operator-focused: tier aliases and segment-mode controls target blue/green deployments and large clusters, and background fetching and Dart prefetching chase throughput. Compatibility remains a stated part of shipping, with explicit deprecations and upgrade notes. The gap from 37.0.0 was nearly five months, against about three for the release before, so the quarterly rhythm has loosened.
◆ Prediction
A 39 release candidate is the next visible step, and removal of legacy ZSTD frame support is already announced for a future release. Timing is less certain now that the last gap ran past a quarter.
Calibre
2.5ANALYTICS
Lighthouse 13.6 shifts Calibre's scores and adds audits for how AI agents read your pages
◆ Current state
Calibre's Test Agents moved to Chrome 156 and Lighthouse 13.6.0, which fixes how simulated throttling calculates LCP and FCP, so scores on PageSpeed Desktop and PageSpeed Mobile Test Profiles should mostly improve with no site change. Snapshots also gained Lighthouse's Agentic Browsing audits, covering the accessibility tree, WebMCP, llms.txt and ARD manifests, a category Google marks as under development. In September the free Core Web Vitals Test added four experimental CrUX ad metrics. August's work attached deployment markers to RUM charts and added all-pages Synthetic aggregates.
◆ Where it's heading
Calibre remains focused on explaining why a metric moved, and this release shows the hard case: the number can move because the test changed. Tracking new browser and Lighthouse data quickly is part of the product, as the same-day CrUX ad metrics showed. Agentic Browsing audits add a new question to a performance tool, whether agents can use a page, which is still early.
◆ Prediction
Expect deployment attribution to grow into alerting, since a regression tied to a commit is the natural trigger. Agentic Browsing audits should keep changing with Lighthouse, so Calibre's treatment of them depends on Google's direction.
Alternatives to Apache Druid and Calibre
Other Analytics 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 Apache Druid or Calibre.
Apache Pinot
Pinot 1.6 adds SQL DDL and vector backends, and now needs Java 25 to run its services.
Displayr
Displayr's Chat can now apply and write Rules, so it changes tables as well as explaining them.
Tinylytics
Tinylytics is cleaning its numbers and adding an AI-ranked SEO audit for Ultra customers
Mode Analytics
Mode resurfaces after almost five quiet months with per-user Snowflake sign-in
Superwise
Superwise now measures the tokens it saves and can shorten model replies to save more
See all Apache Druid alternatives → · See all Calibre alternatives →
Recent activity from Apache Druid and Calibre
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoCalibreChrome 156 & Lighthouse 13.6.0
- 1mo agoApache DruidDruid 38.0.0
- 1mo agoApache DruidDruid 38.0.0 release candidate 1 tagged
- 1mo agoCalibreCore Web Vitals Test, now with ad metrics
- 2mo agoCalibreSee the performance impact of every website deployment
- 2mo agoCalibreSynthetic Metrics: All pages, segmented by Test Profile and Deployment
- 3mo agoCalibreMonitor Single Page App performance with soft navigations
- 3mo agoCalibreSynthetic site scan, a new way to import and monitor your site
- 5mo agoApache DruidDruid 37.0.0
- 6mo agoApache Druiddruid-37.0.0-rc1
- 8mo agoApache DruidDruid 36.0.0
- 9mo agoApache Druiddruid-36.0.0-rc1
Frequently asked questions
What is the difference between Apache Druid and Calibre?
They serve adjacent needs but don't currently overlap on shipped themes. Calibre is currently shipping more aggressively (velocity 2.5 vs 0.0), 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 Apache Druid better than Calibre?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Calibre is currently shipping more aggressively (velocity 2.5 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to Apache Druid?
Top Apache Druid alternatives in Analytics are ranked by recent ship velocity. Browse the "Apache Druid alternatives" section above for the current picks, or visit /alternatives/apache-druid for the full list with editorial commentary on each.
What are the best alternatives to Calibre?
Top Calibre alternatives in Analytics are ranked by recent ship velocity. Browse the "Calibre alternatives" section above for the current picks, or visit /alternatives/calibreapp for the full list with editorial commentary on each.