You searched for a free or open-source Next.js SaaS starter. Good — you should, and I'm not going to bury the answer to sell you something. Free ones exist, they're on GitHub, and I've named the real repos below. What almost no page tells you is the second half: "free" is the download price, not the total. This page publishes the part that gets left off — an itemised, roughly-70-to-90-hour count of wiring Clerk, hardening Stripe webhooks, plugging in email and keeping the dependency tree alive.
Yes — there are free, open-source Next.js SaaS starters, and if free is a hard constraint you should use one. The two I'd hand a friend first are nextjs/saas-starter (MIT, from the Next.js team) and vercel/nextjs-subscription-payments (MIT, Next.js + Supabase Auth + Stripe). Both are readable, both are genuinely free for commercial use, and cloning either teaches you the moving parts. SaaS Starter — the paid kit this site sells — has no free tier. So if you leave for a free repo, no hard feelings; the rest of this page is here so you leave knowing the true cost, not to trap you.
The one thing I want you to take away: the gap between a free starter and something you can charge money on top of is measured in tens of hours of unglamorous wiring, not a weekend. Below, that gap is itemised so you can price your own time honestly and decide.
Most "free SaaS starter" articles are affiliate funnels that never actually link a free repo. Here are four that exist as of July 2026. Licenses change, so the honest instruction is: open each repo and check its LICENSE file before you build anything commercial on it.
The reference implementation from the Next.js team: Postgres, Drizzle ORM, Stripe checkout, and Owner/Member roles with an activity log — genuinely more team structure than the paid kit on this site. Its own README calls it "intentionally minimal and to be used as a learning resource". No transactional email, no admin metrics, no blog, no tests, no i18n. As of mid-July 2026 it carried roughly 15,957 stars and its most recent commit was a December 2025 CVE-2025-55182 security bump — after which keeping it current becomes your job. Best free pick for learning the plumbing.
vercel/nextjs-subscription-payments
MIT · free · VercelThe canonical "Next.js + Supabase + Stripe subscriptions" template. Supabase Auth handles users, Stripe handles recurring billing, and the two are kept in sync by a webhook. It's the fastest free on-ramp if you already want Supabase in the stack. It stops at subscriptions, though — no admin panel, no email templates, no i18n, no test suite. Best free pick if Supabase is your preferred database and auth. If you're weighing that route, we wrote a whole decision page: Clerk + Prisma vs Supabase for a Next.js SaaS starter.
A wider, enterprise-leaning open-source monorepo: Next.js, Clerk auth, Stripe, Prisma and a Turborepo layout — closest in shape to a paid kit while staying free. The trade is the usual one for ambitious open source: a bigger surface to understand, and maintenance that's on you. Read its license and recent commit history before committing; enterprise-scoped repos age faster than their READMEs admit.
Free and genuinely complete — auth, Stripe/Lemon Squeezy, admin dashboard, email — but the honest caveat is it's built on the Wasp full-stack framework (React + Node), not plain Next.js App Router. If you searched specifically for Next.js, that framework choice is a real fork in the road: you'd be learning Wasp's conventions, not Next's. Included here because it's the strongest "free and finished" option, provided the framework fits.
No affiliate links, no referral tags — these go straight to GitHub. If a repo has gone stale or changed license since this was written, trust the repo over this page.
This is where "free" stops being one word. A free repo and a paid one can both write "Stripe billing" in a bullet — the difference is whether that means a checkout button plus a TODO, or a signature-verified webhook that keeps plans in sync. The column that matters is how much is already finished.
| Capability | Free / open-source (typical) | SaaS Starter ($149) |
|---|---|---|
| Price | Free (MIT / OSS) | $149 one project · $299 unlimited |
| Read the source before using | Yes — public | Partial — npm run audit + live demo published |
| Auth wired end-to-end | Skeleton — you finish it | Yes — Clerk, protected routes, middleware |
| Stripe webhooks with signature verification + plan sync | Often partial / example-grade | Yes — verified, plan enum synced |
| Billing portal | Usually not | Yes |
| Transactional email templates | Rarely | Yes — Resend + 4 React Email |
| Admin panel with MRR metrics | No | Yes |
| i18n | No | Yes — 8 locales (next-intl) |
| Automated tests shipped | Rarely | Yes — 45 Vitest |
| Docs + AI agent configs | Varies | Yes — docs, CLAUDE.md, Cursor rules |
| Someone else maintains the deps | No — it's your fork | Yes — free updates for life |
| Multi-tenant teams / orgs | nextjs/saas-starter has Owner/Member | No — User/Admin only |
Note the last row: the free official starter beats the paid kit on team roles. "Paid" is not a synonym for "more". The paid kit's edge is that the finished rows are finished — and you can verify which via the published audit in the full comparison.
A free starter gives you a running Next.js app and a head start on one or two pieces. Everything else that separates "runs locally" from "I can charge a stranger's credit card and sleep" is manual wiring. Here's that gap, itemised. These are estimates from building this exact stack more than once, not a stopwatch reading — your speed varies, and if you already know a piece cold, subtract it.
| What "free" quietly bills you | Rough hours | Why it eats time |
|---|---|---|
| Wire Clerk (or finish the auth skeleton) + middleware + protected routes | ~10 | Session handling, social login, route matchers, syncing users into your DB on webhook. |
| Harden Stripe: checkout + billing portal + signature-verified webhooks + plan sync | ~18 | The example-grade webhook is the trap. Verifying signatures, handling subscription.updated/deleted, and keeping a plan enum in sync is where days go. |
| Prisma schema, Postgres, migrations, seed | ~6 | Modelling users, Stripe fields, running migrations cleanly across environments. |
| Admin panel + MRR / plan-split queries | ~10 | Nobody ships this free; you build the queries and the UI from nothing. |
| Resend + transactional email templates, wired to events | ~7 | Welcome + subscription emails, React Email templates, and testing they actually send. |
| next-intl scaffolding across locales | ~8 | Routing, message catalogues, and not breaking SSG in the process. |
| A test suite you trust + CI | ~8 | Writing 40+ meaningful tests, not snapshot filler, plus a green pipeline. |
| Rate limiting, security headers, glue, deploy config | ~5 | The unglamorous last mile that's invisible until it bites. |
| One-time total, roughly | ~72 hours | Before a single feature of your actual product. |
Call it 70-to-90 hours depending on how much you copy from memory — the same ballpark our build-vs-buy comparison reaches by a different route (~77h). At a $50/hour hobby rate that's about $3,500 of evenings; at a $100/hour contractor rate, roughly $7,000. That's also why this site's home page cites "160+ hours saved" — that figure is the whole build (plumbing plus design, marketing pages, deploy and polish), while the ~72 above is only the plumbing measured on its own. Different scopes, same honest direction: "free" is the cheapest line item and the most expensive one.
And the line that never stops: dependency maintenance. A free starter is a snapshot; the day after you clone it, Next, Clerk-or-Supabase, Stripe's API version and a dozen transitive packages start drifting. That December 2025 CVE-2025-55182 bump on the official starter is the pattern — someone has to notice, patch and re-test. On a free fork that someone is you, every quarter, forever. A paid kit with lifetime updates moves that recurring cost off your desk. It's not in the ~72-hour table because it's not one-time — it's rent.
You're learning
If the goal is to understand how auth and billing fit together, paying to skip the wiring defeats the purpose. Clone nextjs/saas-starter and read every line — the education is the value.
It's a side project with no deadline
No launch date, no client, evenings to spare. Your hourly value on this is near zero, so the ~72-hour tax is a hobby, not a cost. Free wins on the maths.
You want Wasp / Supabase / a stack we don't ship
If your architecture is decided and it's not "Next.js + Clerk + Prisma", a free repo built for your stack beats bending a paid one. Right tool over sunk cost.
Teams are a hard requirement today
SaaS Starter is single-tenant (User/Admin). The free official starter's Owner/Member roles are more than we ship. If org seats are non-negotiable, free actually out-features us here.
The moment your time is worth more than the money. If the project is commercial and time-boxed, spending two working weeks wiring plumbing you could buy for $149 is the expensive choice — that's ~$3,500–$7,000 of your hours versus a one-time $149, and the kit ships the finished rows the free repos leave as exercises. The break-even is brutally simple: if 72 hours of your time is worth more than $149 (it almost always is once there's a deadline), buy. If it isn't, don't — and I mean that.
There's a second, quieter reason: the finished rows are actually finished, and you can check before paying. SaaS Starter ships an npm run audit command that prints its own gaps — including that its ApiKey table is a dead scaffold today. That output is published in full, red findings included. You're not trading "free but yours to fix" for "paid and unknown" — you're trading it for "paid and audited".
No — it's a one-time paid, private repo ($149 for one project, $299 unlimited), with a 30-day money-back guarantee. There's no free tier of this specific kit, and pretending otherwise would undercut the whole point of this page. If free is the constraint, use one of the four repos named above; the honest first pick is nextjs/saas-starter.
The MIT-licensed ones (nextjs/saas-starter, vercel/nextjs-subscription-payments, wasp-lang/open-saas) permit commercial use, including in closed-source products, as long as you keep the license notice. Always open the repo's LICENSE file yourself before shipping — licenses and terms change, and this page is a snapshot, not legal advice.
Because the ~72 hours of wiring in the table above is the product — the finished, audited, tested version of the plumbing the free repos leave as an exercise, plus lifetime dependency updates so the maintenance rent isn't yours. If those hours are worth less to you than $149, the free repo is the correct choice and I'd rather you take it than resent the purchase.
The $149 Starter license covers one commercial project; the $299 Unlimited license covers as many as you like and can be used for client work. Both include free updates for life. Full terms are on the terms page.
30-day money-back guarantee, no questions asked — see the refund policy. The window exists because it's a private repo you can't fully read before paying, so the published audit output and the live demo are the pre-purchase proof.
If free wins on your maths, go clone nextjs/saas-starter with my blessing. If two weeks of wiring is worth more to you than $149, skip it — buy the audited, tested, maintained version and spend those hours on your actual product. 30-day refund either way.
One-time payment · 30-day refund · Instant GitHub access · Read the docs before buying