How Fern runs multi-tenant docs for Webflow and ElevenLabs on Vercel
By Steven Van ·
Fern moved 65% of its docs platform from Pages Router to App Router in seven days, cutting page load times by up to 80%.
Fern, which builds developer documentation and SDKs, runs customer docs for Webflow, ElevenLabs and other companies across custom domains from a single Next.js app on Vercel. Partway through migrating the platform from the Pages Router to the App Router, Fern's team moved 65% of it in seven days rather than taking on a months-long engineering project, as described in the case study.
- Time to first byte is 3x faster
- Page load times are cut by up to 80%
- The platform serves 6 million+ page views a month from 1 million+ unique visitors
- Deploys now take five minutes and go out multiple times a day
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