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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.
Shared themes:mcp
Calibre vs Fulcrum: at a glance
| Feature | Calibre | Fulcrum |
|---|---|---|
| Sector | Analytics | Analytics |
| Velocity score | 6.3 | 6.3 |
| Sparks · 30d | 1 | 0 |
| Top themes | web-performance, mcp, coding-agents, rum | field data collection, gps, mcp, mobile |
| Last editorial update | 4d ago | 21h ago |
| Website | Visit → | — |
What is Calibre?
Calibre MCP lets your coding agent read RUM and Lighthouse data, then fix the slow code
Calibre now ships a read-only MCP server that gives Claude Code, Cursor, Codex, Copilot, Claude and ChatGPT access to an account's RUM, CrUX and Synthetic data, included on every plan. It came days after Test Agents moved to Chrome 156 and Lighthouse 13.6.0. The latest entry is a design tidy-up that places each page's Guide link in the same top-right spot.
What is Fulcrum?
Fulcrum ships Follow Mode to iOS and Android and tightens MCP sign-in.
Fulcrum, a field data collection platform, released Follow Mode on iOS and Android 2611.0.0, keeping the map centred on the collector, and Android now accepts a required GPS accuracy as fine as 0.1 m. The weekly web release redesigned the MCP authorization page to show the requesting client and organization, and fixed blank Report Builder PDFs and App MCP form validation. The Insights AI assistant opened to all customers in October.
Calibre vs Fulcrum: editorial side-by-side
Calibre
6.3ANALYTICS
Calibre MCP lets your coding agent read RUM and Lighthouse data, then fix the slow code
◆ Current state
Calibre now ships a read-only MCP server that gives Claude Code, Cursor, Codex, Copilot, Claude and ChatGPT access to an account's RUM, CrUX and Synthetic data, included on every plan. It came days after Test Agents moved to Chrome 156 and Lighthouse 13.6.0. The latest entry is a design tidy-up that places each page's Guide link in the same top-right spot.
◆ Where it's heading
Calibre is turning its monitoring data into something agents act on rather than something people read in dashboards. The summer work on deployment markers, all-pages aggregates and the audit log built the context and governance an agent needs: which deploy, which page, who connected. Expect the remaining surface to follow the same path, with agents both querying performance and being measured by it.
◆ Prediction
The likely next step is write access or deploy-linked workflows over MCP, such as an agent opening a fix tied to a regression marker, since the current server is explicitly read-only and the launch frames fixing as the goal.
Fulcrum
6.3ANALYTICS
Fulcrum ships Follow Mode to iOS and Android and tightens MCP sign-in.
◆ Current state
Fulcrum, a field data collection platform, released Follow Mode on iOS and Android 2611.0.0, keeping the map centred on the collector, and Android now accepts a required GPS accuracy as fine as 0.1 m. The weekly web release redesigned the MCP authorization page to show the requesting client and organization, and fixed blank Report Builder PDFs and App MCP form validation. The Insights AI assistant opened to all customers in October.
◆ Where it's heading
Two tracks continue: precision GPS for field crews, with external receivers and accuracy settings, and controlled access for outside AI assistants through the MCP server. Most releases are fixes on a weekly mobile and web cadence.
◆ Prediction
Expect the GPS integration to leave beta and the MCP server to move past alpha with OAuth as the default sign-in.
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.
Dovetail
Dovetail lets admins choose which connectors members can plug into the workspace.
Dagster
Dagster drops Python 3.10 and lets agents run schedules and sensors through MCP.
OpenHouse
OpenHouse adds time-zone-aware retention and per-database table caps.
Countly
Countly 25.03.59 defaults to Node 26, supports MongoDB 9 and tightens app scoping.
Kubecost
Kubecost cuts three 3.3.2 release candidates in two days, still without notes.
See all Calibre alternatives → · See all Fulcrum alternatives →
Recent activity from Calibre and Fulcrum
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoFulcrumWeb: clearer MCP consent page, blank PDF and form fixes
- 1d agoFulcrumiOS 2611.0.0 brings Follow Mode and a rebuild for iOS 27
- 1d agoFulcrumAndroid 2611.0.0 adds Follow Mode and 0.1 m accuracy setting
- 2d agoFulcrumNew! Follow Mode
- 4d agoCalibreDeploys: see which release made your site slower
- 5d agoCalibreGuides: everything in its right place
- 8d agoFulcrumWeb: MCP sign-in with OAuth (alpha), GPS capture on repeatables
- 9d agoFulcrumAndroid 2610.3.0: Follow Mode rotation and photo stability fixes
- 11d agoCalibreCalibre MCP: connect your coding agent to your performance data ⚡
- 14d agoCalibreChrome 156 & Lighthouse 13.6.0
- 1mo agoCalibreCore Web Vitals Test, now with ad metrics
- 2mo agoCalibreSynthetic Metrics: All pages, segmented by Test Profile and Deployment
Frequently asked questions
What is the difference between Calibre and Fulcrum?
Both compete on the same themes — mcp — within Analytics. Calibre and Fulcrum are shipping at a similar cadence (velocity 6.3 vs 6.3, 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 Calibre better than Fulcrum?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Calibre and Fulcrum are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). 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.