Ship your SaaS in days, not months.

A production-ready Next.js kit with auth, billing, multi-tenant orgs, AI chat, and the boring parts already wired up. We're putting the final polish on it - join the waitlist for early-bird pricing and first access.

Launching soon · One-time payment · Lifetime updates

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Jan Marshal
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Acme Inc · Production
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Past due

Six pillars. One starter kit.

SyntaxKit ships the boring-but-critical parts of a SaaS so you can spend day one on the thing that actually makes your product different.

Authentication & Identity

Better Auth with everything a B2B product needs on day one.

Email + OAuthTOTP 2FAPasskeys

Multi-Tenant Orgs & RBAC

Organizations, invitations, and role hierarchy enforced in the database.

Owner / admin / memberSeat limitsLast-owner guard

Stripe Billing

Subscriptions, trials, and a webhook pipeline that never drifts.

Checkout + PortalIdempotent webhooksGrace periods

AI Chat, Streaming

Vercel AI SDK and Gateway, with usage ledgers and entitlement gates.

Streaming responsesMulti-model gatingUsage ledger

Type-Safe API Layer

oRPC end-to-end with TanStack Query on the client and Zod everywhere.

oRPC + TanStack QueryZod validationOpenAPI reference

Production Ops

Analytics, observability, rate limiting, and health probes wired up.

PostHog + OTelUpstash rate limitsHealth endpoints

Lock in early-bird pricing.

Join the waitlist and we'll email you the moment the kit goes on sale - with a launch discount for everyone on the list.

No spam. Unsubscribe any time.