Supastarter

31SaaS feels like a project built by someone who actually ships products, not someone assembling a checklist of features. The whole thing runs on Next.js 14, and the structure is clean in a way that makes sense the moment you open the repo — the kind of layout you’d probably set up yourself after a few iterations, just without the wasted weekend. The authentication flow, Stripe setup, and email handling are already connected and working, not half-finished stubs. The UI is put together with shadcn and Tailwind, so it looks modern without being overdesigned, and it’s easy to extend without fighting the styling choices. What stands out is that you can start building real features almost immediately. There’s a proper dashboard, a place for marketing pages, a blog engine that doesn’t feel like an afterthought, and small touches like sensible error handling and clean form patterns. It’s not trying to reinvent the wheel — it’s just a solid, well-assembled foundation that saves you from the usual setup grind. If you want a boilerplate that stays out of your way and lets you move quickly without later regretting the shortcuts, 31SaaS is one of the more thoughtfully built options out there.

Achromatic is a Next.js 15–based SaaS starter that tries to cover most of the groundwork developers usually build themselves: authentication, organizations, role management, billing, email, and a consistent UI built on shadcn/ui and Tailwind. The appeal is that it doesn’t just drop in loose components — the pieces are wired together in a way that feels closer to a real application than a template. The onboarding flow, subscription logic, and organization system actually work out of the box, which makes it easy to jump into feature development without spending days on the usual boilerplate chores. There are a few things worth noting, though. The project is relatively new, and the ecosystem around it is still small, so you’re buying into a structure that depends heavily on the maintainer’s ongoing involvement. It’s an opinionated setup, which is great if you like the architecture as-is, but less ideal if you prefer a lighter, more minimal foundation. Achromatic positions itself as a time-saver for developers who want a polished starting point rather than assembling every piece manually, and it mostly succeeds at that. Still, it’s best suited for teams comfortable adopting someone else’s patterns and conventions anyone needing maximum flexibility might find it a bit heavier than they’d like.

BuilderKit.ai is a boilerplate / starter‑kit built with Next.js + Supabase + Tailwind CSS + TypeScript, aimed at helping developers launch AI‑powered SaaS/web applications quickly. Rather than being a minimal template, BuilderKit comes pre‑wired with modules and features that cover many needs for an AI SaaS: authentication (email, Google auth, magic‑link), payments (via Stripe or LemonSqueezy), email integrations, admin dashboard, SEO‑friendly landing pages & waitlist pages, and even pre-built AI‑app demos. On top of that, BuilderKit bundles 10‑15+ ready-to-use AI tools / applications: for example chat, image generation, PDF‑chat, voice transcription, image‑enhancing / upscaling, and more, so you don’t just get a skeleton, but a suite of working AI‑powered features you can build on or customize. he code is distributed via a GitHub repo, and once set up (with environment variables, dependencies installed, etc.) you can run and deploy the app commonly on platforms like Vercel.