Choose Netlify when previews, forms, and redirects are the job. Choose Vercel when Next.js caching and previews are the job. Both start on a free tier and charge once commercial or team features apply.
Netlify
Static sites with built-in builds and previews
Free tier, then paid
Strengths
Preview deploys on pull requests
Forms and redirects are built in
Limits
Bandwidth and build minutes are capped on the free tier