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Comparison · Analytics

Calibre vs Microsoft Clarity

A side-by-side editorial comparison of Calibre and Microsoft Clarity — release velocity, themes, recent moves, and the top alternatives to consider.

Shared themes:mcp

Calibre vs Microsoft Clarity: at a glance

FeatureCalibreMicrosoft Clarity
SectorAnalyticsAnalytics
Velocity score6.35.0
Sparks · 30d10
Top themesweb-performance, mcp, coding-agents, rumai-visibility, agent-traffic, bot-analytics, web-analytics
Last editorial update1d ago4d ago
WebsiteVisit →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 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.

Read the full Calibre trajectory →

What is Microsoft Clarity?

Clarity turns its AI-traffic work toward agents on sites, with a 5.2M-session study.

Microsoft Clarity's product releases sit almost entirely on AI visibility: citation topics, branded vs non-branded query splits, scrape-to-referral attribution, custom brand terms and page-type classification in Bot Activity. October has brought no product release so far, only two blog posts: a study of AI-powered visits across 5.2 million sessions, and an account of cutting clarity.js by 4.5% with an automated AI experiment loop.

Read the full Microsoft Clarity trajectory →

Calibre vs Microsoft Clarity: editorial side-by-side

C
Calibre
ANALYTICS
6.3

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.

M5.0

Clarity turns its AI-traffic work toward agents on sites, with a 5.2M-session study.

◆ Current state

Microsoft Clarity's product releases sit almost entirely on AI visibility: citation topics, branded vs non-branded query splits, scrape-to-referral attribution, custom brand terms and page-type classification in Bot Activity. October has brought no product release so far, only two blog posts: a study of AI-powered visits across 5.2 million sessions, and an account of cutting clarity.js by 4.5% with an automated AI experiment loop.

◆ Where it's heading

Each release adds another filter or segmentation layer to the same AI-visibility surface, moving it from raw counts toward per-page and per-brand reporting. The agent study extends the subject from AI crawlers and citations to agents acting on sites, including searches, forms and checkout. The MCP server posts suggest Clarity also wants this data queried by agents, not just read in dashboards.

◆ Prediction

Expect agent sessions to appear as their own segment in Clarity reporting, following the path from crawler data to scrape-to-referral. The entries don't confirm such a feature or show whether Clarity will charge for any of this.

Alternatives to Calibre and Microsoft Clarity

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 Microsoft Clarity.

See all Calibre alternatives → · See all Microsoft Clarity alternatives →

Recent activity from Calibre and Microsoft Clarity

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 1d agoCalibreCalibre MCP: connect your coding agent to your performance data ⚡
  2. 4d agoCalibreChrome 156 & Lighthouse 13.6.0
  3. 6d agoMicrosoft ClarityWhat AI Agents Do on Websites: Insights From 5.2 Million Sessions
  4. 6d agoMicrosoft ClarityHow We Made clarity.js 4.5% Smaller Without Sacrificing Compatibility
  5. 1mo agoMicrosoft ClarityHow We Use an AI Skill to Ship Clarity Releases with Confidence
  6. 1mo agoMicrosoft ClarityCustomize Your Brand Terms in Microsoft Clarity AI Visibility
  7. 1mo agoMicrosoft ClarityIntroducing Page Classification in Clarity Bot Activity
  8. 1mo agoCalibreCore Web Vitals Test, now with ad metrics
  9. 1mo agoMicrosoft ClarityHow SaaS Teams Can Use Clarity to Understand Monetization Behavior
  10. 2mo agoCalibreSynthetic Metrics: All pages, segmented by Test Profile and Deployment
  11. 2mo agoCalibreSee the performance impact of every website deployment
  12. 3mo agoCalibreMonitor Single Page App performance with soft navigations

Frequently asked questions

What is the difference between Calibre and Microsoft Clarity?

Both compete on the same themes — mcp — within Analytics. 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 Microsoft Clarity?

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 Microsoft Clarity?

Top Microsoft Clarity alternatives in Analytics are ranked by recent ship velocity. Browse the "Microsoft Clarity alternatives" section above for the current picks, or visit /alternatives/microsoft-clarity for the full list with editorial commentary on each.