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Comparison · Next.js + Supabase
The best Supabase SaaS boilerplate: an honest comparison
If you want the biggest community and a generalist Next.js base, ShipFast. If you want the most features and don't mind paying for breadth, Makerkit. If you're on Supabase and want multi-tenant security proven by a test at the lowest entry price, that's the gap we built ShipSealed to fill.
01 What actually matters for a Supabase app
Most "best boilerplate" lists compare landing pages and Stripe buttons. For a Supabase app, the thing that decides whether you sleep at night is different: your Postgres sits on the internet behind the anon key, so your authorization lives in Row-Level Security policies, not just your app code. One table shipped with RLS off, or a policy that says using (true), and that table is public.
So the questions that matter are:
- Is it actually built for Supabase, or is Supabase one adapter among many?
- Does it ship correct multi-tenant RLS — and does it prove isolation with a test, or just hope?
- Will a future migration that loosens a policy get caught before it ships?
- Then the usual: auth, billing, tests, price, and how much you'll fight the code.
02 The comparison
Fair and high-level — feature sets and prices change, so verify current details on each vendor's site (links below). This is about focus and philosophy, which are stable.
| ShipSealed | ShipFast | Makerkit | Supastarter | |
|---|---|---|---|---|
| Built for | Next.js + Supabase, security-first | Next.js, generalist | Next.js + Supabase (also Remix) | Next.js + Supabase |
| Multi-tenant RLS | Yes — the core of the kit | Basic / your job | Yes | Yes |
| Tenant isolation proven by a test | Yes — an isolation test that runs against a real DB | No | Not as a headline | Not as a headline |
| CI gate for RLS drift | Yes — free tool (airlock-rls) + optional monitor | No | No | No |
| Free tools / try before buy | Yes — free starter + CLI + CI gate on npm | No | Limited | Limited |
| Feature breadth | Focused (auth, RLS, billing, admin, push) | Broad, marketing-heavy | Very broad / mature | Broad |
| Community size | New | Very large | Established | Established |
| Entry price | Lowest of the four ($119.99 one-time) | Higher (one-time) | Higher / premium tiers | Mid–high |
Check current pricing/features: ShipFast · Makerkit · Supastarter. We list ShipSealed's prices openly on our pricing page.
03 Where each one genuinely wins
ShipFast — the community and content are unmatched. If you want a huge network, a proven generalist base, and you're not tied to Supabase, it's a safe, popular pick.
Makerkit — the most mature and feature-complete. If you want every module already built (teams, roles, billing, admin, i18n) and breadth is worth the price, it's excellent.
Supastarter — a solid, focused Supabase option in the same family as Makerkit.
ShipSealed — we didn't try to out-feature Makerkit or out-community ShipFast. We picked one thing the others treat as an afterthought and made it the point: your multi-tenant data actually staying isolated, and proven by a test that fails your build if it ever isn't. Plus the lowest entry price, and free tools so you can try the security approach before paying a cent.
04 So which should you pick?
The honest version: you won't go wrong with any of them for the app scaffold. The difference is what happens the day you add a table and forget the policy. That's the day we built for.
Try the security approach free first
Before you buy anything, run airlock-rls on your Supabase project — it's a free CI gate that fails your build when a table ships exposed or a policy is permissive. Or clone the free nextjs-supabase-starter (auth + RLS + an isolation test). If you like how it thinks, the full boilerplate is the paid step up.
See ShipSealed pricing → — Base and Pro, per-seat, one-time, with the RLS isolation suite baked in.
Grab the Supabase RLS cheat sheet
The golden rules, the footguns that leak in prod, correct policy snippets, and the isolation test — on one page.
FAQ
What makes a Supabase SaaS boilerplate different from a generic Next.js one?
With Supabase your Postgres is reachable from the browser behind the anon key, so authorization lives in Row-Level Security policies, not just app code. A Supabase-specific boilerplate ships correct multi-tenant RLS and, ideally, a test that proves tenant isolation — a generic Next.js starter usually leaves that to you.
Is a cheaper boilerplate worse?
Not necessarily. Price mostly reflects breadth (how many modules) and brand. For a Supabase app, the thing that actually protects you is proven tenant isolation, which isn't a function of price. Pick on fit and on whether the security is tested, not on the sticker.
Are you biased — you're one of the options?
Yes, and we said so up top. We tried to be fair: ShipFast's community and Makerkit's breadth are real strengths we don't have. Our edge is narrow and specific — tenant isolation proven by a test, plus free tools so you can judge for yourself before paying.