Building auth, billing, multi-tenancy, and a marketing site from scratch is roughly $7,500–$12,000 of developer time. A boilerplate is a one-time $0–$649. The savings concentrate exactly where the bugs live: team invitations, per-mutation role checks, and Stripe webhook reconciliation. This guide compares the main options by the two things that actually decide the purchase — price and multi-tenancy — and then tells you how to choose.
Decide multi-tenancy on day one. If there's any chance you'll sell to teams (organizations, invites, roles), you need it from the start. Retrofitting multi-tenancy onto a single-tenant kit is the most expensive rewrite in this space.
| Kit | Price (2026) | Multi-tenancy + RBAC | Best for |
|---|---|---|---|
| SaaS Starter (this site) | $99 one-time | ✅ org-scoped + RBAC | Multi-tenant B2B on a budget, latest stack |
| ShipFast | ~$199 one-time | ❌ none | Cheapest solo B2C launch |
| Makerkit | ~$299 Pro / $599 Teams | ✅ service-layer + RLS | Battle-tested B2B, plugins, tests |
| Supastarter | $349 → $1,499 all-access | ✅ deepest (RLS) | Feature-dense, DB-agnostic, multi-framework |
| ixartz | Free (MIT) / ~$99 Pro | ✅ in free tier | Zero budget; Next.js 16 + Tailwind v4 |
| Vercel starter | Free | ❌ none | Learning / reference |
Pricing synthesized from public 2026 roundups (see sources); Makerkit in particular varies between one-time and subscription across sources — confirm on their site.
Wins on price and simplicity, and explicitly does not do multi-tenancy — no teams, orgs, or RBAC. Perfect when you're one founder shipping one simple app to individual users. Watch the ceiling: the day you need teams or roles, you're building them on a codebase that wasn't designed for them, and founders often migrate off it at that point.
Shipping since 2022, so it's the most proven kit here. A plugin system (v3) lets you add AI chatbot, roadmap voting, changelog without fighting core updates, and it's the only kit that ships full end-to-end tests. Multi-tenancy is enforced in the service layer with RLS on core tables. If you want the safest, most-supported B2B foundation and the price is fine, this is the pick.
Despite the name it's not Supabase-locked — database-agnostic (Drizzle/Prisma over any Postgres), Better Auth, a Hono API layer, five payment providers, i18n, Playwright, and the deepest multi-tenancy (blanket RLS). Ships for Next.js, Nuxt, and TanStack Start. It's the most feature-dense option; the trade-off is price ($349+), which only pays off if you'll use the breadth.
MIT-licensed, and the free tier already includes multi-tenancy, RBAC, and i18n — genuinely generous. It's also the one running Next.js 16 + Tailwind v4. Uses Clerk + Drizzle; the ~$99 Pro adds landing pages and components. If budget is the only constraint, start here.
Maintained by the Next.js team, so it tracks the framework reliably: Auth.js + Stripe + a basic dashboard. No multi-tenancy, no admin, no i18n. Best as a reference implementation.
Where it fits: you want real org-scoped multi-tenancy + RBAC + signature-verified Stripe billing + hashed API keys + audit logs, on Next.js 16 with the async Request APIs, but you don't want to pay $299–$599 for it. That's the gap it targets — the feature set of the pricier B2B kits at $99 one-time. Honest trade-offs: it's newer and less battle-tested than Makerkit (which has three years and a large community), and less feature-dense than Supastarter (fewer payment providers, no multi-framework). If you need years of proven track record or maximum breadth, buy those. If you want the core multi-tenant B2B foundation, current stack, cheap — that's the trade this makes.
🛠 SaaS Starter — multi-tenancy + RBAC on Next.js 16, $99 →And the reality check every honest roundup lands on: a boilerplate is a starting point, not a finished product. Whichever you pick, you still code, patch, and maintain the rest.
Pricing and feature notes drawn from public 2026 comparisons, including Makerkit's roundup, Supastarter's roundup, BuildMVPFast, and StarterPick. These vendors are competitors; prices change — confirm on each official site.