Best SaaS Boilerplates in 2026

Quick Comparison: Best SaaS Boilerplates in 2026

Building a production SaaS from scratch takes months of undifferentiated plumbing: authentication, webhook idempotency, multi-tenant role-based access control (RBAC), AI usage budgets, and cross-platform builds. A production-ready SaaS boilerplate gives you that foundation on day one so you can spend your time on the product features your customers actually pay for. Here is how the top SaaS starter kits and Next.js boilerplates compare in 2026.

• Best Overall (Web, Mobile, Desktop & AI): supastack — Unified Turborepo monorepo with Next.js 16, TanStack Start, Expo mobile, Tauri 2 desktop, Better Auth, 8 payment providers, encrypted BYOK AI budgets, AGENTS.md, and 144+ test files.
• Best for Nuxt & Multi-Framework Web: supastarter — Polished web-first boilerplate for Next.js and Nuxt with Better Auth, organization multi-tenancy, and five payment providers.
• Best for Dedicated Supabase Teams: Makerkit — B2B SaaS starter kit built tightly around Supabase Auth, Postgres RLS, Next.js, and React Router.
• Best for Rapid Solo Indie MVPs: ShipFast — Lightweight Next.js template built for solo founders validating a simple B2C idea over a weekend.
• Best for Browser Extension Products: TurboStarter — Cross-platform monorepo pairing Next.js and Expo with a WXT browser extension.

What to Look for in a SaaS Boilerplate in 2026

A SaaS starter kit is not a landing page theme — it is the security, billing, and data architecture your product will live inside for years. Before buying a Next.js or TypeScript boilerplate, evaluate these six load-bearing layers.

1. Modern Authentication & Zero Lock-In — Look for first-class support for email OTP, magic links, OAuth, two-factor authentication (2FA), WebAuthn passkeys, session revocation, and admin impersonation via libraries like Better Auth. Avoid starters that lock your user table inside a proprietary third-party auth cloud where per-MAU pricing spikes as you grow. See our authentication architecture guide for what happens after the login screen.

2. Payment Flexibility & Merchant of Record (MoR) Support — Global SaaS products often outgrow a single gateway. Choose a boilerplate that normalizes Stripe alongside Merchant of Record providers like Lemon Squeezy, Polar, Paddle, Creem, and Dodo Payments behind an idempotent webhook ledger — plus RevenueCat if you ship on iOS and Android. Read how idempotent billing webhooks prevent duplicate fulfillment.

3. B2B Multi-Tenancy, RBAC & Database Isolation — Selling to companies requires organization workspaces, team invitations, seat-based billing, and owner/admin/member role hierarchy. Every query must derive tenant scope on the server and pair with indexed PostgreSQL Row-Level Security (RLS) policies — see Postgres RLS and workspace auth and test your schema with the free Supabase RLS Policy Generator.

4. Multi-Framework & Cross-Platform Reach — In 2026, many SaaS products need more than a browser tab. Whether you prefer Next.js 16 App Router or TanStack Start on the web, having an Expo (React Native) mobile app and a Tauri 2 desktop app sharing the same TypeScript contracts in one Turborepo monorepo saves months of API duplication.

5. AI Cost Controls & Coding Agent Readiness (`AGENTS.md`) — If your SaaS includes AI features, raw API calls will wreck your margins; you need a model router, encrypted bring-your-own-key (BYOK) storage, per-workspace token budgets, and Trigger.dev background jobs. Equally important is how well the repo works with Claude Code, Cursor, and Windsurf: look for AGENTS.md, .ai/ architecture mirrors, llms.txt, and structured Agent Skills.

6. Automated Test Suite & Self-Hosting Options — A boilerplate with zero tests turns every customization into a manual regression hunt. Demand a deterministic test suite that verifies auth, tenant isolation, and billing webhooks locally without cloud credentials, plus clean Docker, Vercel, and self-hosted Postgres deployment guides.

1. supastack — Best Overall SaaS Boilerplate in 2026

Best for: Developers and teams building serious B2B, AI, or cross-platform SaaS products who want one tested foundation across Web (Next.js + TanStack Start), Mobile (Expo), and Desktop (Tauri).

supastack ranks #1 in 2026 because it solves the whole product lifecycle rather than just the marketing landing page. Inside a clean pnpm and Turborepo monorepo, you get two web engine options (Next.js 16 App Router and TanStack Start), a native Expo iOS and Android app, and a signed Tauri 2 desktop app for macOS, Windows, and Linux — all sharing typed packages for Better Auth, Drizzle ORM + PostgreSQL, multi-tenant workspaces, and 13-locale internationalization.

Where most starters stop at a basic Stripe checkout, supastack ships eight web payment adapters (Stripe, Lemon Squeezy, Polar, Creem, Dodo Payments, Paddle, Whop, and PayPal) behind an idempotent webhook_event ledger, plus RevenueCat mobile purchasing, workspace API keys, signed outbound webhooks, an audit log, GDPR data export, and an AI router with encrypted per-workspace BYOK keys and spend budgets. It is also built from the ground up for AI-assisted engineering with AGENTS.md, .ai/ file mirrors, 26+ Agent Skills, and 144+ automated test files runnable via pnpm verify:local. Explore the full technical stack documentation or model your tiers with the free SaaS Pricing Page Generator.

• Pros: Four client surfaces (Next.js, TanStack Start, Expo mobile, Tauri desktop); 8 payment providers + RevenueCat; full B2B organizations, RBAC, API keys, signed webhooks, and audit logs; encrypted BYOK AI router with workspace budgets; AGENTS.md + 26 Agent Skills; 144+ automated test files; lifetime license starting at $149 (with $100 launch savings already included and 50% builder cashback).
• Cons: Deeper architecture than single-folder weekend templates if you only need a one-page waitlist; browser extensions (WXT) are not included out of the box.

2. Best Multi-Framework & B2B Starters: supastarter, Makerkit & TurboStarter

If your team has a specific framework requirement like Nuxt, React Router, or a companion browser extension, these three starters are the strongest alternatives to evaluate.

supastarter — *Best for developers who need Nuxt alongside Next.js.* supastarter is a mature, well-documented web SaaS boilerplate supporting both Next.js and Nuxt. It integrates Better Auth (with 2FA, passkeys, and organizations), five payment providers (Stripe, Lemon Squeezy, Polar, Creem, Dodo), i18n, and AGENTS.md specifications. Pros: Strong Nuxt support, five billing providers, self-hosting docs, lifetime license. Cons: Web-only (no native Tauri desktop app in the core kit), fewer enterprise developer-platform primitives (like signed outbound customer webhooks and encrypted BYOK AI budget enforcement) than supastack.

Makerkit — *Best for teams committed to the Supabase ecosystem.* Makerkit is a battle-tested B2B starter for Next.js and React Router (Remix) built deeply around Supabase Auth, Postgres RLS, and multi-tenant team workspaces. Pros: Deep Supabase conventions, strong B2B organization flows, thorough documentation. Cons: Tight coupling to Supabase conventions, no desktop client, and higher ongoing license tiers compared to one-time cross-platform kits.

TurboStarter — *Best for products that need a browser extension.* TurboStarter ships a pnpm monorepo with Next.js, Expo mobile, and a WXT browser extension sharing Better Auth and Drizzle. Pros: Includes a Chrome/Firefox extension target plus Stripe, Polar, Lemon Squeezy, Dodo, RevenueCat, and Superwall. Cons: No desktop app, no workspace API keys or signed outbound webhooks, no BYOK AI budget router, and a smaller test suite (15 test files vs supastack's 144+). Read our full supastack vs TurboStarter comparison.

3. Best Indie & Rapid-Launch Starters: ShipFast, MkSaaS, Indie Kit & SaaSBold

When your primary goal is launching a single-user web app or credit-based AI tool as quickly as possible, these Next.js templates optimize for day-one speed.

ShipFast — *Best for solo indie hackers validating a B2C idea in a weekend.* Created by Marc Lou, ShipFast popularized the modern Next.js boilerplate movement with landing page sections, NextAuth, Stripe / Lemon Squeezy, and MongoDB or Supabase. Pros: Very fast to learn, large indie community, conversion-focused landing blocks. Cons: Built for single-user MVPs rather than multi-tenant B2B teams; lacks RBAC, passkeys, mobile/desktop apps, and automated test depth.

MkSaaS — *Best for web-only credit-based AI tools and bilingual English/Chinese launches.* MkSaaS is a polished single-app Next.js 16 starter featuring a built-in credit ledger, blog, docs, newsletter, and Cloudflare Workers deployment branches. Pros: Ready-made credit system, rich marketing blocks, Cloudflare support, proven by the author's live products. Cons: Web-only, no organization workspaces or seat billing, no customer API keys or outbound webhooks. Read our full supastack vs MkSaaS comparison.

Indie Kit Pro & Indie Kit B2B — *Best for lifetime-deal (AppSumo) redemption and six payment gateways on the web.* Indie Kit wires Stripe, Polar, Paddle, Dodo, PayPal, and Lemon Squeezy with credit expiry and Inngest background jobs. Pros: Six web payment providers and built-in LTD code redemption. Cons: Team workspaces require buying a separate B2B repository, no mobile or desktop apps, and zero automated test files in the reviewed repo. See supastack vs Indie Kit Pro and supastack vs Indie Kit B2B.

SaaSBold — *Best for budget-conscious solo devs who want Figma files.* SaaSBold covers Next.js, Auth.js, Stripe, and Prisma or Drizzle at an entry-level price with Figma design assets. Pros: Affordable one-time price, clean UI, Figma source included. Cons: No multi-tenancy or organizations, Stripe-only, Next.js-only, and basic internationalization.

4. Best Niche AI & Edge Starters: ShipAny, AnotherWrapper & TanStarter

Specialized starters target narrower niches such as pre-built AI generation screens or ultra-low-cost Cloudflare Workers hosting.

ShipAny — *Best for launching a credit-based AI image, video, or chat portal.* Popular in the indie AI community, ShipAny Template Two connects OpenRouter, Replicate, fal, and Gemini with credits, affiliate links, and Stripe / Creem / PayPal. Pros: Wide model catalog out of the box, built-in affiliate and ad widgets. Cons: No multi-tenant team workspaces, no encrypted BYOK workspace budgets, web-only, and 0 test files. Read our full supastack vs ShipAny comparison.

AnotherWrapper — *Best for demoing standalone AI wrapper screens fast.* AnotherWrapper bundles eight finished Next.js AI demo apps (chat, image, video, voice, vision, audio) wired to seven model providers. Pros: Fastest path to a rebrandable AI demo screen. Cons: Thin B2B infrastructure — no team workspaces, no BYOK spend guardrails, no customer API keys or webhooks, and only 2 test files. Read our full supastack vs AnotherWrapper comparison.

TanStarter — *Best for minimal TanStack Start apps on Cloudflare Workers.* TanStarter is a lightweight single-app starter running TanStack Start, Vite, Better Auth, and Cloudflare R2. Pros: Near-zero hosting cost on Cloudflare Workers and a small (~365-file) codebase. Cons: Web-only, no team workspaces or RBAC, no API keys or webhooks; note that supastack now also includes a full TanStack Start web surface alongside Next.js, Expo, and Tauri. Read our full supastack vs TanStarter comparison.

Our Recommendation: Which SaaS Boilerplate Should You Choose?

The right SaaS starter kit is the one whose architectural boundaries match the product you plan to run twelve months from now — not just the landing page you want to tweet on Friday. Use this decision matrix to match your project to the best boilerplate:

For most founders and product teams in 2026, we recommend supastack because it combines Next.js 16 and TanStack Start web engines, native Expo mobile, and Tauri 2 desktop in one tested monorepo, backed by Better Auth, multi-tenant workspaces, eight payment providers, encrypted BYOK AI budgets, and AGENTS.md agent guardrails. If you are still weighing whether to adopt a boilerplate at all, read starter kit or from scratch and our guide to choosing a SaaS stack.

Frequently Asked Questions About SaaS Boilerplates

Answers to the most common questions developers and technical founders ask before investing in a SaaS boilerplate in 2026.

• Are SaaS boilerplates worth the investment in 2026? — Yes. Even with AI coding assistants like Claude Code and Cursor, wiring authentication, idempotent multi-provider billing webhooks, tenant isolation, background jobs, and mobile/desktop build pipelines takes 6 to 12 weeks to get right. A tested boilerplate recoups its one-time license cost in the first week of saved engineering time.
• Why can’t I just ask Cursor or Claude Code to generate my boilerplate from scratch? — Coding agents generate UI screens quickly, but they hallucinate subtle security and billing bugs when asked to invent multi-tenant boundaries or webhook deduplication from a blank folder. Starting from a repository like supastack that already ships AGENTS.md, .ai/ architecture contracts, 26 Agent Skills, and 144+ test files gives the agent verified guardrails to extend.
• Can I customize everything and own the source code? — Yes. With supastack and most commercial starter kits, you receive full Git repository access with no proprietary runtime lock-in. Your product logic lives in clean modules that you can modify, self-host with Docker, or deploy to Vercel and Cloudflare.
• What if I only need a web app right now — should I still pick a cross-platform boilerplate? — Yes. In supastack, the Expo mobile app and Tauri desktop app are optional workspaces in the monorepo that cost zero overhead until you need them, while the shared server packages (Better Auth, 8 billing adapters, workspaces, AI router, API keys, webhooks) are already more complete than web-only starters.
• Which payment providers should a 2026 SaaS boilerplate support? — At minimum, look for Stripe plus a Merchant of Record (MoR) like Lemon Squeezy, Polar, Paddle, Creem, or Dodo Payments to handle global VAT and sales tax automatically, and RevenueCat if you plan to ship iOS or Android apps. supastack supports all eight web providers plus RevenueCat behind one idempotent webhook contract.
• How do SaaS boilerplates handle updates without breaking my product code? — Good boilerplates separate core infrastructure packages from product domain code. supastack isolates auth, billing, database, and AI inside shared workspace packages and documents a step-by-step update workflow so you can pull upstream improvements cleanly.