---
title: "SvelteKit SaaS starter with Facebook Login - LaunchFast"
description: "SvelteKit starter with Facebook Login, session handling, protected routes, and email auth included. Launch sign-in without OAuth glue work."
source: "https://www.launchfa.st/use-cases/sveltekit-facebook-oauth-saas-starter"
framework: "SvelteKit"
integration: "Facebook Login"
keywords: "SvelteKit, Facebook Login, SaaS starter, Authentication, LaunchFast"
---

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# SvelteKit SaaS starter with Facebook Login

Ship Facebook Login in your SvelteKit app with sessions, protected routes, and email auth working together. Skip the callback wiring, cookie edge cases, and deploy surprises that stall most OAuth rollouts.

## The problem

Rolling your own Facebook Login in SvelteKit means OAuth callbacks, session storage, CSRF edges, and protected routes that break the first time you deploy to production.

Scaffold SvelteKit, find a Facebook Login tutorial, wire env vars, fix auth sessions, then repeat for billing and email. Most teams lose weeks before the stack deploys cleanly or handles real users.

## Why LaunchFast

LaunchFast is a production SvelteKit repo where Facebook Login already talks to auth, billing, and deployment. Add your keys, customize the UI, and ship while the cross-cutting SaaS plumbing stays done.

### Benefits

- Facebook Login wired with server-side sessions
- Protected routes and admin headers included
- Combine with Google, GitHub, or email auth in one app

## How it works

### Clone and configure

Add your Facebook Login keys and provider settings to the included env template. The SvelteKit app boots with the integration active.

### Customize product flows

Adjust pages, pricing, and onboarding on top of pre-wired routes. Auth, webhooks, and integration helpers stay intact.

### Deploy with included configs

Use the bundled Vercel, Cloudflare Workers, or Node deployment setup. Sessions and webhooks are tuned for production, not just localhost.

### Swap providers later

Client wants a different payment processor or database? Change adapters through config instead of rewriting your SvelteKit app.

## FAQ

### Is this only about Facebook Login?

No. The SvelteKit kit is a complete SaaS foundation. Facebook Login ships alongside auth, billing, email, analytics, storage, and deployment so you are not assembling the stack from scattered tutorials.

### Can I see it working before I buy?

Yes. The live demo runs the same SvelteKit starter with real auth and billing flows. Open the demo, click through signup and checkout, then compare with your timeline.

### What if I need Astro or SvelteKit instead?

LaunchFast ships the same integration surface in all three frameworks. Related links on this page point to the Facebook Login guides for Astro and SvelteKit too.