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Comparison · Analytics
Calibre vs Graphite
A side-by-side editorial comparison of Calibre and Graphite — release velocity, themes, recent moves, and the top alternatives to consider.
Calibre vs Graphite: at a glance
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 Graphite?
Graphite's answer to its own CVE backlog is a pre-release nobody calls official.
Graphite's release feed shows three entries across four years. The last tagged work is a pair of 1.2.1 pre-releases whose own notes decline to call them official: they exist, in the maintainer's words, as a master-branch milestone for people who want to avoid CVE checks against 1.1.x, with the second adding XSS fixes. Both point at a single open discussion thread about the state of the project.
Calibre vs Graphite: 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.
Graphite
0.0ANALYTICS
Graphite's answer to its own CVE backlog is a pre-release nobody calls official.
◆ Current state
Graphite's release feed shows three entries across four years. The last tagged work is a pair of 1.2.1 pre-releases whose own notes decline to call them official: they exist, in the maintainer's words, as a master-branch milestone for people who want to avoid CVE checks against 1.1.x, with the second adding XSS fixes. Both point at a single open discussion thread about the state of the project.
◆ Where it's heading
This is a project whose maintenance and its release process have come apart. The security fixes are real and are in master, but nothing has been promoted to a release users can adopt through normal channels, which leaves operators choosing between a version that fails CVE scans and an explicitly unofficial tag. The four-year gap since the 1.1.9 preparation commit is the clearest signal available.
◆ Prediction
Nothing in these entries supports a confident call on a 1.2.1 final; the maintainer has pointed the question at a discussion thread rather than a roadmap.
Alternatives to Calibre and Graphite
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 Graphite.
Dovetail
Dovetail opens its docs to Claude and ChatGPT as co-authors.
Apache SkyWalking
SkyWalking 11.1 builds service maps from OpenTelemetry traces, no SkyWalking agent required.
OpenReplay
OpenReplay's feed is Helm chart bumps behind its asset-cacher deny list.
Tinybird
Tinybird shrinks its Local image by a third after a run of observability updates.
OpenHouse
OpenHouse tightens view authorization and moves its optimizer schema to Flyway.
See all Calibre alternatives → · See all Graphite alternatives →
Recent activity from Calibre and Graphite
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoCalibreGuides: everything in its right place
- 7d agoCalibreCalibre MCP: connect your coding agent to your performance data ⚡
- 10d 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
- 2mo agoCalibreSee the performance impact of every website deployment
- 7mo agoGraphiteUnofficial master milestone adding XSS fixes
- 1y agoGraphiteUnofficial master milestone for avoiding 1.1.x CVE checks
- 4y agoGraphiteMerge commit preparing the 1.1.9 release
Frequently asked questions
What is the difference between Calibre and Graphite?
They serve adjacent needs but don't currently overlap on shipped themes. Calibre is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 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 Graphite?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Calibre is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 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 Graphite?
Top Graphite alternatives in Analytics are ranked by recent ship velocity. Browse the "Graphite alternatives" section above for the current picks, or visit /alternatives/graphite for the full list with editorial commentary on each.