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Comparison · Analytics
Calibre vs Fulcrum
A side-by-side editorial comparison of Calibre and Fulcrum — release velocity, themes, recent moves, and the top alternatives to consider.
Calibre vs Fulcrum: at a glance
| Feature | Calibre | Fulcrum |
|---|---|---|
| Sector | Analytics | Analytics |
| Velocity score | 5.0 | 6.3 |
| Sparks · 30d | 0 | 0 |
| Top themes | web-performance, rum, deployment-attribution, core-web-vitals | field-data-collection, mobile-releases, gps, maps |
| Last editorial update | 4d ago | 4d ago |
| Website | Visit → | — |
What is Calibre?
Calibre is tying every performance number back to the deploy that caused it.
The August release brings deployments into Real User Monitoring: deploy markers run along the bottom of charts, hovering one reveals the commit, author, and time, and clicking through opens the commit in source control, with each deployment compared against the previous. The same day, Synthetic metrics moved from one page at a time to median aggregates across all pages, segmented by test profile, deployment, and page — so a regression can be identified as site-wide or isolated. Before that: automatic measurement of soft navigations in single-page apps, a site-scan crawler that discovers and maintains the monitored page list on its own, self-service SAML SSO with SCIM on the Team plan, and an organisation-wide audit log that exports as NDJSON or streams to a SIEM over signed webhooks.
What is Fulcrum?
Fulcrum ships to four platforms a week and says almost nothing in each note.
Releases arrive in near-daily pairs across iOS, Android and web, each carrying one or two fixes. The newest iOS build stops the GPS accuracy banner covering MBTiles map popups and repairs an intermittent failure in the USERFULLNAME() data event function. The surrounding releases are the same shape: duplicate-save and HEIC-in-PDF corrections, an Android GPS tracking crash, list filter performance.
Calibre vs Fulcrum: editorial side-by-side
Calibre
5.0ANALYTICS
Calibre is tying every performance number back to the deploy that caused it.
◆ Current state
The August release brings deployments into Real User Monitoring: deploy markers run along the bottom of charts, hovering one reveals the commit, author, and time, and clicking through opens the commit in source control, with each deployment compared against the previous. The same day, Synthetic metrics moved from one page at a time to median aggregates across all pages, segmented by test profile, deployment, and page — so a regression can be identified as site-wide or isolated. Before that: automatic measurement of soft navigations in single-page apps, a site-scan crawler that discovers and maintains the monitored page list on its own, self-service SAML SSO with SCIM on the Team plan, and an organisation-wide audit log that exports as NDJSON or streams to a SIEM over signed webhooks.
◆ Where it's heading
Calibre is closing the loop between a metric moving and someone knowing why. Deployment attribution supplies the cause, the all-pages segmentation supplies the scope, and soft-navigation measurement fills the blind spot that made SPA numbers untrustworthy in the first place. Running alongside that is a distinctly enterprise track — SSO, SCIM, and an audit log with SIEM streaming are procurement requirements, and putting SAML on the Team plan rather than reserving it for Company is a deliberate move down-market with them.
◆ Prediction
Expect deployment attribution to grow into alerting — a regression tied to a specific commit is the natural trigger for a notification, and the pieces are now all in place. How far the site-scan crawler is meant to replace manual page management is not yet clear from these entries.
Fulcrum
6.3ANALYTICS
Fulcrum ships to four platforms a week and says almost nothing in each note.
◆ Current state
Releases arrive in near-daily pairs across iOS, Android and web, each carrying one or two fixes. The newest iOS build stops the GPS accuracy banner covering MBTiles map popups and repairs an intermittent failure in the USERFULLNAME() data event function. The surrounding releases are the same shape: duplicate-save and HEIC-in-PDF corrections, an Android GPS tracking crash, list filter performance.
◆ Where it's heading
This is a field data collection product maintained by continuous small correction rather than by feature releases, with the mobile clients versioned in lockstep and rolled out in phases. Nothing in this window changes what Fulcrum does; the work is keeping capture reliable on hardware and in conditions the team cannot fully control. The notes are honest about that, including the phased-rollout caveat that not every user is on the latest build.
◆ Prediction
Expect the pattern to continue — paired mobile releases every few days, each a short fix list, with substantive changes surfacing in the web release notes rather than the app builds.
Alternatives to Calibre and Fulcrum
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 Calibre or Fulcrum.
Chord
Chord is turning its analytics assistant into something with memory, and now feeding it more sources
Datawrapper
Datawrapper ships one small fix at a time, each named for the chart it touches
Holistics
After a summer fencing in its AI layer, Holistics points it at the question analysts get asked most.
dbt Core
Fusion's 2.0 train has become adapter work: Exasol from scratch, ClickHouse toward parity.
AgencyAnalytics
Reporting tool turning itself into the place agencies prove AI visibility to clients
See all Calibre alternatives → · See all Fulcrum alternatives →
Recent activity from Calibre and Fulcrum
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoFulcrumiOS: MBTiles popups and USERFULLNAME() fixes
- 5d agoFulcrumDuplicate-save, HEIC-in-PDF and role-permission fixes
- 5d agoFulcrumAndroid: crash fix while tracking GPS location
- 5d agoFulcrumAndroid location editor dims surrounding records
- 8d agoFulcrumAndroid: faster list filters, external-GPS marker fix
- 8d agoFulcrumiOS: geometry-editor clarity and photo-annotation memory
- 8d agoCalibreSynthetic Metrics: All pages, segmented by Test Profile and Deployment
- 8d agoCalibreSee the performance impact of every website deployment
- 1mo agoCalibreMonitor Single Page App performance with soft navigations
- 1mo agoCalibreSynthetic site scan, a new way to import and monitor your site
- 1mo agoCalibreSelf-service SAML Single Sign-On, now available on the Team plan
- 2mo agoCalibreAudit log: a complete record of security and admin activity
Frequently asked questions
What is the difference between Calibre and Fulcrum?
They serve adjacent needs but don't currently overlap on shipped themes. Fulcrum is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 Calibre better than Fulcrum?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fulcrum is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 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.
What are the best alternatives to Fulcrum?
Top Fulcrum alternatives in Analytics are ranked by recent ship velocity. Browse the "Fulcrum alternatives" section above for the current picks, or visit /alternatives/fulcrum for the full list with editorial commentary on each.