Vercel

Vercel hosts and deploys web applications. Connect a Git repository and every push builds a preview deployment with its own URL, while merges to the main branch go to production.

It's made by the team behind Next.js and supports it closely, along with many other frameworks such as SvelteKit, Nuxt and Astro. Beyond static hosting it runs serverless and edge functions, serves assets from a global network, and offers analytics, image optimisation and storage integrations. There's a free Hobby plan for personal projects and paid plans for teams, with usage-based billing for heavier traffic.