# How Fern delivers 6M+ monthly views and 80% faster docs with Vercel

By Steven Van · 2025-05-15

Fern serves API docs for Webflow and ElevenLabs from one Next.js app on Vercel, with deploys 83% faster and TTFB 3x quicker.

Fern, a documentation platform used by companies including Webflow and ElevenLabs, serves more than 6 million page views and 1 million unique visitors a month from a single Next.js application running on [Vercel](<https://creatorstoolbox.com/tools/vercel>), according to a [case study](<https://vercel.com/blog/how-fern-delivers-6m-monthly-views-and-80-faster-docs-with-vercel>) published by Vercel.

Instead of deploying a separate instance per customer, Fern routes traffic across customer domains from one codebase using Vercel Middleware. Its deployment setup spans three environments: a main multi-tenant stack at prod.ferndocs.com, a CDN-focused version at app.ferndocs.com, and a dev environment at dev.ferndocs.com. Customers can bring their own subdomains (docs.website.com) or subpaths (website.com/docs) by adding a single CNAME record.

- Migrating to Next.js App Router cut page load times by 50-80%, improving navigation speed and Lighthouse scores.

- Moving off AWS Fargate reduced deploy times by 83%.

- Time to first byte is now 3x faster.

![Vercel](<https://www.google.com/s2/favicons?domain=vercel.com&sz=128>)

Vercel

The platform for frontend developers — deploy, preview, and scale web apps and AI agents with zero config.

[View Vercel →](<https://creatorstoolbox.com/tools/vercel>)

[Original source](<https://vercel.com/solutions/multi-tenant-saas>)

[Read How Fern delivers 6M+ monthly views and 80% faster docs with Vercel on Creators Toolbox](<https://creatorstoolbox.com/blog/vercel-how-fern-delivers-6m-monthly-views-and-80-faster-docs-with-vercel>)

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Canonical source: https://creatorstoolbox.com/blog/vercel-how-fern-delivers-6m-monthly-views-and-80-faster-docs-with-vercel