The Vercel adapter may get some more attention and features first (like ISR[1]), but local development only requires NodeJS. So I think you can self-host SvelteKit anywhere that supports NodeJS. SvelteKit is designed to be serverless-first, but still supports traditional servers-based deploys.
And there are several non-Vercel adapters that should just work (Node, Cloudflare Pages, Cloudflare Workers, Netlify, static site generation)[2].
Comments
The Vercel adapter may get some more attention and features first (like ISR[1]), but local development only requires NodeJS. So I think you can self-host SvelteKit anywhere that supports NodeJS. SvelteKit is designed to be serverless-first, but still supports traditional servers-based deploys.
And there are several non-Vercel adapters that should just work (Node, Cloudflare Pages, Cloudflare Workers, Netlify, static site generation)[2].
And even more unofficial adapters[3]!
[1]: https://kit.svelte.dev/docs/adapter-vercel#incremental-stati...
[2]: https://kit.svelte.dev/docs/adapters
[3]: https://sveltesociety.dev/components#adapters