SvelteKit SaaS starter with PostHog
Measure activation and conversion in your SvelteKit app with PostHog events already hooked into signup, billing, and core product actions. You get funnel data without sprinkling snippets in the wrong layouts.
The problem
Adding PostHog to SvelteKit is quick until signup, billing, and product events live in different layouts and your funnel data stops matching reality.
Building it yourself
Scaffold SvelteKit, find a PostHog 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
- Product analytics on day one
- Event hooks in auth and billing flows
- Swap to GA4 or Pirsch without rewrites
How teams ship with this kit
- 1
Clone and configure
Add your PostHog 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
- Auth and billing events
- SEO blog templates
- Sitemap generation
- Product analytics hooks
Common questions
Is this only about PostHog?
No. The SvelteKit kit is a complete SaaS foundation. PostHog 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 PostHog guides for Astro and SvelteKit too.