# Vercel — How GitBook serves 30,000 sites with sub-second content updates

- Company: Vercel (vercel.com)
- Announced: 2026-05-01T04:00:00+00:00
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://vercel.com/blog/how-gitbook-serves-30000-sites-with-sub-second-content-updates
- Record: https://forck.live/items/20714-how-gitbook-serves-30-000-sites-with-sub-second-content-updates
- Subject: v0 / AI SDK / AI Gateway

GitBook hosts 30,000 documentation sites on a single Vercel deployment, serving 120 million monthly page views. The platform processes 40,000 cache invalidations daily, each resolved in under 300 milliseconds, using tag-based invalidation triggered by merge events. AI-driven traffic now accounts for 41% of all page views, having surged 5x year-over-year in 2025.

## Evidence

Verbatim from https://vercel.com/blog/how-gitbook-serves-30000-sites-with-sub-second-content-updates:

> Today, when a change is merged, updated content becomes visible globally within 300 milliseconds. GitBook processes 40,000 of these invalidations daily.

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Record: https://forck.live/items/20714-how-gitbook-serves-30-000-sites-with-sub-second-content-updates
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