SvelteKit SaaS starter with Polar
Monetize your SvelteKit product with Polar checkout, webhooks, and paid-route gating already connected. Configure keys and pricing UI, then start collecting revenue instead of debugging billing plumbing.
The problem
Most SvelteKit founders spend the first two weeks on Polar webhooks, checkout state, and entitlement checks before they write a single product feature.
Building it yourself
Scaffold SvelteKit, find a Polar 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.
What you get out of the box
- Polar checkout wired on day one
- Webhook endpoint for entitlements
- Swap from Stripe without rewriting routes
How teams ship with this kit
- 1
Clone and configure
Add your Polar keys and provider settings to the included env template. The SvelteKit app boots with the integration active.
- 2
Customize product flows
Adjust pages, pricing, and onboarding on top of pre-wired routes. Auth, webhooks, and integration helpers stay intact.
- 3
Deploy with included configs
Use the bundled Vercel, Cloudflare Workers, or Node deployment setup. Sessions and webhooks are tuned for production, not just localhost.
- 4
Swap providers later
Client wants a different payment processor or database? Change adapters through config instead of rewriting your SvelteKit app.
Also ships with every SvelteKit kit
- Google OAuth login
- Protected routes
- Transactional email
- PostHog analytics
Common questions
Is this only about Polar?
No. The SvelteKit kit is a complete SaaS foundation. Polar 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 Polar guides for Astro and SvelteKit too.