Analytics

Lito supports 6 analytics providers out of the box. Heavier scripts (Google Analytics, PostHog, Clarity) run off the main thread via Partytown, while lightweight providers (Plausible, Umami, Fathom) load with defer — so your Lighthouse scores stay perfect either way.

Supported Providers

Provider	Config Key	Weight	Privacy-Focused
Google Analytics 4	`google-analytics`	Heavy (Partytown)	No
PostHog	`posthog`	Heavy (Partytown)	Configurable
Microsoft Clarity	`clarity`	Heavy (Partytown)	No
Plausible	`plausible`	Lightweight (~1KB)	Yes
Umami	`umami`	Lightweight (~2KB)	Yes
Fathom	`fathom`	Lightweight (~2KB)	Yes

Google Analytics 4

{
  "integrations": {
    "analytics": {
      "provider": "google-analytics",
      "measurementId": "G-XXXXXXXXXX"
    }
  }
}

Field	Required	Description
`measurementId`	Yes	Your GA4 Measurement ID (starts with `G-`).

PostHog

{
  "integrations": {
    "analytics": {
      "provider": "posthog",
      "apiKey": "phc_XXXXXXXXXX",
      "apiHost": "https://us.i.posthog.com"
    }
  }
}

Field	Required	Description
`apiKey`	Yes	Your PostHog project API key.
`apiHost`	No	API host. Defaults to `https://us.i.posthog.com`.

Microsoft Clarity

{
  "integrations": {
    "analytics": {
      "provider": "clarity",
      "projectId": "XXXXXXXXXX"
    }
  }
}

Field	Required	Description
`projectId`	Yes	Your Clarity project ID.

Plausible

{
  "integrations": {
    "analytics": {
      "provider": "plausible",
      "domain": "docs.example.com"
    }
  }
}

Field	Required	Description
`domain`	Yes	Your site domain.
`scriptUrl`	No	Custom script URL for self-hosted Plausible.

Umami

{
  "integrations": {
    "analytics": {
      "provider": "umami",
      "websiteId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
    }
  }
}

Field	Required	Description
`websiteId`	Yes	Your Umami website ID.
`scriptUrl`	No	Custom script URL for self-hosted Umami.

Fathom

{
  "integrations": {
    "analytics": {
      "provider": "fathom",
      "siteId": "XXXXXXXX"
    }
  }
}

Field	Required	Description
`siteId`	Yes	Your Fathom site ID.
`scriptUrl`	No	Custom script URL for self-hosted Fathom.

Performance

Lito ensures analytics never degrade your site performance:

Partytown providers (GA, PostHog, Clarity) run in a web worker off the main thread, keeping the UI fully responsive.
Lightweight providers (Plausible, Umami, Fathom) load with defer and are only ~1-2KB — negligible impact.

Tip

If you care about visitor privacy and want the smallest footprint, choose Plausible, Umami, or Fathom. All three are cookie-free and GDPR-friendly by default.

Last updated: March 2, 2026

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