Samphire

Samphire is the most complete SvelteKit kit we have tested. It includes Supabase Auth with email, OAuth and magic links, teams with invites and roles, Stripe subscriptions with a pricing table driven from config, an admin area for users and plans, transactional emails through Resend and English and French translations via Paraglide. Svelte 5 runes are used throughout.

It is opinionated about form actions: almost every mutation is a SvelteKit action with Superforms validation, which keeps client JavaScript small. The docs are short but accurate. The limitation: background jobs are left to you. The README suggests Supabase cron or an external queue, but nothing is wired, so dunning emails and cleanup tasks need your own setup.