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Comparison · Analytics
Calibre vs Glances
A side-by-side editorial comparison of Calibre and Glances — release velocity, themes, recent moves, and the top alternatives to consider.
Calibre vs Glances: 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 with nothing to install. It lands days after Test Agents moved to Chrome 156 and Lighthouse 13.6.0, which added audits for how AI agents read pages. Admins can disable MCP per organisation and revoke connections, and the Company-plan audit log records them.
What is Glances?
After a year of CVE fixes, Glances 4.5.7 turns to making its alerts tell the truth.
Most Glances releases this year carried security patches: 4.5.2 alone corrected eight CVEs, and 4.5.3 to 4.5.6 kept going, ending with a credential leak through URL config values. 4.5.7 in September broke the pattern with a long list of correctness fixes, many of them alerts that fired on the wrong value or never fired, plus WebUI colouring bugs and a fix for --enable-mcp under mcp 2.0. 4.5.8 in October fixed export edge cases.
Calibre vs Glances: 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 with nothing to install. It lands days after Test Agents moved to Chrome 156 and Lighthouse 13.6.0, which added audits for how AI agents read pages. Admins can disable MCP per organisation and revoke connections, and the Company-plan audit log records them.
◆ 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.
Glances
5.0ANALYTICS
After a year of CVE fixes, Glances 4.5.7 turns to making its alerts tell the truth.
◆ Current state
Most Glances releases this year carried security patches: 4.5.2 alone corrected eight CVEs, and 4.5.3 to 4.5.6 kept going, ending with a credential leak through URL config values. 4.5.7 in September broke the pattern with a long list of correctness fixes, many of them alerts that fired on the wrong value or never fired, plus WebUI colouring bugs and a fix for --enable-mcp under mcp 2.0. 4.5.8 in October fixed export edge cases.
◆ Where it's heading
Hardware coverage keeps widening alongside the fixes (Intel, AMD and ARM GPUs, Rockchip NPUs, LXC containers), and a v4 cutover tag in October suggests repository restructuring ahead. The security run appears to have eased since August.
◆ Prediction
Unclear what the v4 cutover changes for users; until it is explained, expect more 4.5.x maintenance releases.
Alternatives to Calibre and Glances
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 Glances.
Holistics
Holistics lets admins put a key dashboard on everyone's Home page.
Apache Cloudberry
Apache Cloudberry ships 2.2.0 after three release candidates.
Rho
Rho 0.5.3 lets Claude sessions run without Rho's own step and time caps.
Displayr
Displayr moves custom visualizations to their own domain, so videos, maps and saved settings work.
Plausible
Plausible removes the goal setup step from funnels.
See all Calibre alternatives → · See all Glances alternatives →
Recent activity from Calibre and Glances
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoCalibreCalibre MCP: connect your coding agent to your performance data ⚡
- 4d agoCalibreChrome 156 & Lighthouse 13.6.0
- 23d agoGlancesGlances 4.5.8
- 23d agoGlancesPre-cutover tag before the v4 migration
- 1mo agoGlancesGlances 4.5.7 fixes dozens of wrong or silent alerts
- 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
- 3mo agoGlancesCredential leak via URL values in /api/4/config
- 3mo agoCalibreMonitor Single Page App performance with soft navigations
- 4mo agoGlancesContainer API latency, ARM GPU monitoring, AMP command-execution fix
- 6mo agoGlancesRockchip MPP and NPU monitoring, plus three CVE corrections
Frequently asked questions
What is the difference between Calibre and Glances?
They serve adjacent needs but don't currently overlap on shipped themes. Calibre is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 Glances?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Calibre is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 Glances?
Top Glances alternatives in Analytics are ranked by recent ship velocity. Browse the "Glances alternatives" section above for the current picks, or visit /alternatives/glances for the full list with editorial commentary on each.