ISR vs SSG: Next.js Data Fetching Strategies for 2025

Jean-Eudes AssogbaJune 29, 2025

ISR vs SSG: Next.js Data Fetching Strategies for 2025

Next.js offers powerful data fetching methods. In 2025, choosing between SSG and ISR impacts both freshness and speed.

Static Site Generation (SSG)

• Builds pages at compile time.
• Ideal for truly static content and portfolio pages.
• Pros: Fast builds, perfect cache hits.

Incremental Static Regeneration (ISR)

• Revalidates pages at runtime based on TTL.
• Balances freshness with static performance.
• Pros: Always up-to-date, minimal rebuild overhead.

Choosing the Right Strategy

| Strategy | Use Case | |----------|-------------------------------------| | SSG | Documentation, blogs with infrequent updates | | ISR | News feeds, dynamic dashboards |