Best free open source SaaS boilerplates in 2026
Free open-source SaaS boilerplates are genuinely good in 2026 — several are maintained projects with real tests and real docs, not abandoned weekend repos. The catch is never the license; it is which features got held back, who fixes the next breaking change, and whether “free” ends at the git clone.
What are the best free open-source SaaS boilerplates?
The three most credible free options are Open SaaS (Wasp), ixartz’s SaaS Boilerplate, and MakerKit Lite — all MIT or equivalently permissive, all maintained, each with a different missing piece you should know before cloning.
| Project | Stack | What the free tier includes | What it holds back |
|---|---|---|---|
| Open SaaS (Wasp) | React + Node + Prisma on Wasp | Auth, Stripe/Polar/Lemon Squeezy, email, admin, Playwright tests, Astro docs | Built on Wasp’s abstractions; docs note some features are still evolving |
| ixartz SaaS Boilerplate (MIT) | Next.js + Clerk + Drizzle | Multi-tenancy, RBAC, i18n, Sentry, testing, landing page | Stripe and transactional email sit in paid tiers |
| MakerKit Lite (MIT) | Next.js + Supabase + Turborepo | Auth, profile, marketing pages, i18n, monorepo conventions | Billing, teams, RBAC, mailers live in the paid kit |
| BoxyHQ boilerplate | Next.js, open source | Enterprise-flavored base (SSO, audit-oriented) | Smaller ecosystem; verify current maintenance yourself |
| SaaS Yacht Club (MIT) | Next.js + Better Auth + Stripe + Drizzle | Auth, Stripe, multi-tenant schema, Resend email | Very new, small community, open issues — evaluate cautiously |
The pattern in that table is the whole free market in miniature: auth is almost always free, and billing and team features are where projects draw the paid line. Open SaaS is the outlier that gives the most away because its business model is the framework behind it, not the template. For how these projects sit next to the paid field, the landscape in best SaaS boilerplates in 2026 is the companion piece.
Before you commit a weekend, run three checks on any candidate: look at the last thirty commits to gauge maintenance rhythm, read open issues for the phrase “not working” without a reply, and follow the README on a clean machine without improvising — if setup fights you, the fork will fight you too. A free kit that costs you two days to boot has already billed you in time.
Is Open SaaS (Wasp) production-ready?
Yes, with one caveat you should weigh honestly: Open SaaS is production-usable — its auth, payments, tests, and deploy paths are built for real products — but adopting it means adopting the Wasp full-stack framework underneath, and Wasp’s abstractions and release cadence become part of your maintenance story.
What you get is unusually complete for a free project. Auth ships with email-verified signup, password reset, and social providers configured through Wasp’s declarative config rather than hand-rolled routes. Payments are pre-wired for Stripe, Polar, and Lemon Squeezy — checkout, webhooks, and subscription handling — so your job is creating products and pasting plan IDs. Email sending via SendGrid, Mailgun, or SMTP, an admin dashboard fed by background jobs, Playwright end-to-end tests with a GitHub Actions pipeline, and an Astro-based docs and blog template round it out. Deployment is a first-class path: one command builds and ships database, server, and client to hosts like Fly.io or Railway, with environment validation that fails loudly when a variable is missing.
The caveat is the framework bet. Wasp compiles a small config language into a full-stack app, and that magic is the product: type safety, jobs, and auth in a few lines. The trade is that Wasp’s ecosystem is smaller than Next.js’s, so fewer blog posts exist for your exact error, AI coding assistants have less Wasp-specific context to draw on, and debugging occasionally means reading the framework itself. The project’s own docs are candid that not every bundled feature is fully finished, which is the right kind of honesty to look for. Before shipping anything on it: run the E2E suite green, set real webhook secrets, verify email deliverability on your domain, and read where sessions actually live. And if Wasp still gives you pause, note the exit ramp — the template is ordinary React, Node, and Prisma underneath, so a feature that outgrows the config layer can be migrated to plain routes, costing you a sprint rather than a rewrite.
What’s the difference between free and paid SaaS starters?
The core difference is accountability: a free starter hands you code with no obligation to keep it current, while a paid starter bundles ongoing updates, a support channel, and a license written for commercial delivery. Free is cheaper in dollars and more expensive in maintenance hours, and which cost dominates depends entirely on how long you run the product.
Feature gating is the visible half. The free ixartz kit includes multi-tenancy and roles but reserves Stripe integration and transactional email for its paid tiers; MakerKit Lite includes auth and structure but leaves billing, teams, and mailers to the full kit. Open SaaS avoids that split by giving the whole template away and sustaining itself through the framework it promotes. With paid kits, feature lists run deeper — organizations, admin panels, billing abstractions, and tested webhook flows are usually present on day one rather than day thirty.
The invisible half is maintenance. Someone has to notice when Stripe deprecates an API version, when the framework ships a major with breaking changes, and when an auth provider alters its session behavior. In a paid kit that is the vendor’s job, which you have already funded; in a free kit it is yours, and a realistic estimate for keeping a modern dependency tree patched and deployed is twenty to sixty hours a year on top of feature work. Licenses differ too: MIT-style grants are maximally permissive but come with no support obligation, while commercial licenses trade some redistribution freedom for seats, update windows, and warranty language. Both models have a place — the arithmetic for deciding where your project falls is in is a SaaS boilerplate worth it, the terminology distinction is in starter kit vs boilerplate, and neither is charity: both price the same maintenance, just on different invoices. Both are also priced against the same infrastructure bill, which does not care whether your code was free, and the full first-year cost picture is in the SaaS boilerplate cost breakdown.
Can I use a free boilerplate for a commercial product?
Yes — MIT-licensed starters like Open SaaS, ixartz’s kit, and MakerKit Lite explicitly permit commercial use, including paid products and client work. What the license does not permit is reselling the boilerplate itself as a competing starter, and what it does not give you is a warranty.
The mechanics are simple if you keep them clean. MIT requires you to preserve the license and copyright notice in your copies of the software — keep the LICENSE file in your repository and you have satisfied the attribution obligation; there is no legal requirement to put a credit in your product’s footer. There is no warranty, meaning if a security hole in the starter costs you money, the authors owe you nothing, which is a real reason to read the auth and payment code before launch rather than after. Trademark rules still apply independently: you cannot ship a product under the starter’s name or branding as if it were yours.
Two practical cautions sit on top of the license. First, the third-party services inside the free kits have their own terms — hosted auth providers and databases shift off their free tiers as you grow, and payment processors take a percentage either way; the hosting side of that is mapped in cheapest way to host a SaaS. Second, some commercial situations want a commercial license anyway: enterprise buyers occasionally ask for license provenance, and client-facing or white-label delivery is where redistribution terms start to bite. If you are reselling the same foundation across client projects, that is the exact use case paid tiers like Startplate’s Agency license are written for — unlimited client deliverables plus white-label clearance on the pricing page. If you are somewhere in between, pick the license whose redistribution terms match the worst-case plan you can imagine for the next two years, not the plan you happen to have today.
Which free boilerplate includes Stripe and auth out of the box?
Open SaaS is the clearest answer: it ships configured Stripe (plus Polar and Lemon Squeezy) checkout and webhooks alongside email-verified and social auth from the first commit. The free ixartz kit includes auth through Clerk but holds Stripe for its paid tiers, and MakerKit Lite includes auth but not billing — so among major free starters, Open SaaS is the one where both rails arrive together.
“Out of the box” should still be held to a standard, because a logo on a README proves little. For payments, the kit should already contain hosted checkout, webhook signature verification, the subscription lifecycle — upgrade, downgrade, cancellation, failed-payment retries — and a customer portal, all documented down to which environment variables to set. Open SaaS meets that bar and goes further with guides for the parts you must do yourself, because nobody ships you a Stripe account: you still create the products, copy the plan IDs, point the webhook at your domain, and swap test keys for live ones. Expect a few hours of configuration rather than a few days of integration.
Auth follows the same rule. The flows exist — signup, verification, reset, OAuth callbacks — but you create the provider applications, add the redirect URLs, and set your own secrets. The remaining risk lives in the seams: confirm webhook events are verified before your handlers mutate data, confirm sessions expire and refresh correctly, and confirm your error paths cover a declined card. Push that same skepticism deeper: check whether reset tokens expire, whether sessions can be revoked on demand, and whether role checks happen on the server rather than in hidden menus. A kit that shows all three within the first hour of reading is telling you how the rest of its code is written. If you would rather start from a paid kit where that checklist has already been closed out and documented, the buying criteria in the SaaS boilerplate guide cover what to inspect, and more write-ups live in the blog.
The short version
Free open-source SaaS starters are a legitimate starting point: Open SaaS is the most complete all-rounder, ixartz wins on Next.js conventions, and MakerKit Lite is the cleanest architecture preview with billing held back for the paid kit. The real differences are maintenance accountability, held-back features, and license terms rather than price. Commercial use is fine under MIT as long as you keep the license file and do not resell the starter itself. Pick by checking maintenance rhythm, setup friction, and whether Stripe plus auth truly arrive wired — because that is where free quietly ends.