How Speechify Serves 500,000 Dynamic Pages to 60 Million Users Through Vercel

Speechify, which started as a tool for people with dyslexia, has now grown into an AI work platform used by 60 million users. After experiencing a security hack in the past, the tech team completely rebuilt their infrastructure stack based on Next.js and Vercel.

As a result, Speechify achieved the following outcomes:

• Serving over 500,000 pages in more than 40 languages
• 50% cost reduction through automatic scaling with Fluid compute
• Maintaining 99.99% uptime with zero security incidents
• Tripling global user reach

Speechify's website consists of constantly changing, experimental content such as onboarding funnels and landing pages, making static generation difficult. To address this, they combined dynamic rendering and caching using Vercel Data Cache, ISR (Incremental Static Regeneration), and Next.js Cache Components.

Additionally, to respond to rapid market changes, they use the Instant Rollbacks feature to minimize deployment risk. Through this, they built an environment where a small growth team can continuously ship new AI features at a pace fitting a large-scale service, without a separate platform engineering team.