What do Svelte development services from Miracuves include?
A Svelte engagement covers the whole web product, not just the components. We scope the routes, build the UI in Svelte 5 with runes, write the server side in SvelteKit (load functions, form actions and +server.ts API endpoints), connect your database and auth, and deploy through the adapter that fits your hosting - Vercel, Cloudflare or a Node server. At handoff you get the repository, the environment setup and a runbook.
- New SvelteKit apps: SaaS dashboards, storefronts, marketplaces, content sites
- Migrations from React, Next.js or Svelte 4 to Svelte 5
- Performance and SEO audits of an existing Svelte codebase
- Ongoing retainer work: new features, version upgrades, maintenance
Svelte or SvelteKit - which one do you actually need?
Svelte is the component framework: it compiles .svelte files into JavaScript that updates the DOM directly. SvelteKit is the application framework built on top of it, much as Next.js sits on React. It adds file-based routing, server-side rendering, prerendering, data loading, form handling and deployment adapters.
If you are adding interactive widgets to an existing site, Svelte with Vite on its own is enough. If you are building anything with several pages, logins, search traffic or an API, you want SvelteKit - and the Svelte team itself recommends SvelteKit as the default way to start a new project. Nearly every Svelte product we build for clients is a SvelteKit app.
When is Svelte the right choice, and when is it not?
Svelte suits products where load speed and JavaScript weight matter: content and marketing sites, storefronts, dashboards opened on mid-range phones, and embeddable widgets. Runes keep real-time screens such as live charts, order boards and notification feeds short to write, because a $state value updates only the parts of the page that read it.
It is a weaker fit when your team already ships React and hires for it, when you depend on a component library or SDK that only exists for React, or when the main product is a native mobile app. Svelte's ecosystem and hiring pool are smaller than React's, and we say so when that trade-off would cost you more than the speed gain.
Should you hire Svelte developers in-house or work with an agency?
Experienced Svelte developers are harder to find than React developers, and one hire rarely covers SvelteKit server code, database design, auth, hosting and QA together. Hiring in-house makes sense once the product is stable and needs someone full time.
Before that point, a team that has already set up runes, adapters, svelte-check and CI on other SvelteKit projects gets you to launch sooner and leaves a codebase your first hire can pick up on day one. That is why Miracuves hands over the full repository, documentation and environment guide, and why the monthly retainer exists to cover the gap until you hire.
How do you migrate a React or Svelte 4 app to Svelte 5?
From Svelte 4, the path is incremental. Svelte 5 still runs most Svelte 4 component syntax, so we upgrade the packages, run the official migration script (npx sv migrate svelte-5), then convert $: statements, export let props and event directives to runes and callback props, one route at a time with tests between steps.
From React or Next.js, it is a rewrite of the UI layer, not a port. Components, hooks and context map to Svelte components, runes and Svelte's context API, while your backend and APIs usually stay as they are. We move one route or feature at a time and keep the same URLs, so search rankings and users are not disrupted.
Is SvelteKit good for SEO and page speed?
Yes, when it is set up for it. SvelteKit renders pages on the server by default, so search engines and AI crawlers receive full HTML rather than an empty shell. Pages that rarely change can be prerendered to static files at build time, chosen per route with export const prerender, and code is split per route so each page loads only the JavaScript it needs.
What still needs deliberate work: titles and meta tags per route through svelte:head, structured data, a sitemap endpoint, correctly sized images, and keeping third-party scripts off the critical path. We check Core Web Vitals with Lighthouse on the production build, never the dev server, before launch.
What does a SvelteKit app cost to run after launch?
Running costs depend on the rendering mode more than on Svelte itself. A fully prerendered site can be served as static files from a CDN for very little. Server-rendered routes need a Node server or a serverless or edge platform such as Vercel or Cloudflare, billed by requests and compute time, and the database and auth provider are often the larger line items.
Because SvelteKit lets you mix modes route by route, we prerender what we can and server-render only the pages that need fresh data, so the hosting bill tracks real traffic instead of paying to render the same page again for every visitor.
