Open-source SaaS starter kits
The 10 best self-hosted SaaS starter kits in 2026
Asked for the best open-source SaaS starter kits, Claude Sonnet 4.5 puts ShipFast first this week, scoring it 8.7 out of 10 on its own rubric.
A pure AEO test
“Name the 10 open-source SaaS starter kits you would most recommend to a buyer today, and score each one on your rubric.”
This list is only what Claude Sonnet 4.5 says when asked that, from its own knowledge, with no web access and nothing from this site in the prompt.
Nobody here places, edits or reorders an entry. It is a snapshot of how an AI assistant already sees each brand, not a judgement of which product is best.
How it works .
The exact prompt
Category: Open-source SaaS starter kits
What counts as one: A SaaS starter kit is a complete application codebase you download, self-host and own outright, rather than a hosted platform you rent. It ships the parts that are the same in every SaaS product (user authentication, subscription billing, an admin surface, and a database/ORM layer with migrations), so a founder starts from a running app instead of an empty repo. Some are genuinely open source under a permissive licence; others are proprietary codebases sold under a paid licence that still gives you the source, which is a meaningful legal difference even though both are self-hosted.
Name the 10 products in this category you would most recommend to a buyer today, then score every one of them from 1 to 10 on each criterion of your rubric:
- tech_stack_quality (Tech stack & architecture, weight 25): Does it use a modern, well-maintained tech stack with good architectural decisions?
- feature_completeness (Feature completeness, weight 30): How complete and production-ready are the core SaaS features out of the box?
- documentation_support (Documentation & support, weight 20): How good is the documentation, and what support can you expect?
- customization_ease (Customization ease, weight 15): How easy is it to customize and extend for your specific use case?
- license_value (License & pricing value, weight 10): Is the licensing fair and does the pricing represent good value?
For each product give its official website URL, a one sentence neutral description, who it is best for, 2 or 3 strengths, 2 or 3 limitations, and for every criterion a score with a one sentence reason.
JSON shape:
{"products": [{"name": "...", "url": "https://...", "open_source": false, "description": "...", "best_for": "...", "strengths": ["..."], "limitations": ["..."], "scores": {"tech_stack_quality": {"score": 8, "reason": "..."}}}]}
10 tools ranked
Ranked 2026-10-06 by Claude Sonnet 4.5
Refreshed weekly, 1 week of history
What counts as open-source SaaS starter kits
A SaaS starter kit is a complete application codebase you download, self-host and own outright, rather than a hosted platform you rent. It ships the parts that are the same in every SaaS product (user authentication, subscription billing, an admin surface, and a database/ORM layer with migrations), so a founder starts from a running app instead of an empty repo. Some are genuinely open source under a permissive licence; others are proprietary codebases sold under a paid licence that still gives you the source, which is a meaningful legal difference even though both are self-hosted.
The rubric
Written by the model for this category before it ranked anything, then frozen so weekly scores stay comparable. Each criterion is scored 1 to 10, and the rank is the weighted average.
Criterion Weight What the model asks of each product
Tech stack & architecture 25% Does it use a modern, well-maintained tech stack with good architectural decisions? Feature completeness 30% How complete and production-ready are the core SaaS features out of the box? Documentation & support 20% How good is the documentation, and what support can you expect? Customization ease 15% How easy is it to customize and extend for your specific use case? License & pricing value 10% Is the licensing fair and does the pricing represent good value?
1
shipfa.st
Best for Solo developers and indie hackers who want to ship a Next.js-based SaaS quickly and are comfortable with the modern React ecosystem.
A Next.js boilerplate with authentication, payments, email, and database setup designed to help developers launch SaaS products quickly.
Tech stack & architecture 9
Uses modern Next.js 14, TypeScript, Tailwind CSS, and well-regarded libraries like NextAuth and Prisma.
Feature completeness 9
Includes authentication, Stripe payments, email integration, database setup, SEO, and analytics out of the box.
Documentation & support 9
Comprehensive docs with video walkthroughs, active Discord community, and responsive creator support.
Customization ease 8
Well-structured codebase with clear separation of concerns makes customization straightforward for experienced Next.js developers.
License & pricing value 7
At $199-299, it's reasonably priced for what you get, though the proprietary license limits redistribution rights.
What the model rates
Very comprehensive feature set including Stripe integration, email setup, and SEO optimization Active community and frequent updates from the creator Excellent documentation with video tutorials and deployment guides
What it holds against it
Proprietary license means you're buying access to code rather than true open source Opinionated tech choices may not suit all use cases One-time purchase model means major updates may require repurchase
Visit ShipFast
2
saasrock.com
Best for Developers building complex B2B SaaS with multi-tenancy requirements who prefer Remix over Next.js.
A Remix-based SaaS framework with multi-tenancy, role-based access control, and comprehensive admin features for building B2B applications.
Tech stack & architecture 9
Built on Remix with TypeScript, Prisma, and Tailwind CSS, representing cutting-edge full-stack architecture.
Feature completeness 10
Exceptionally complete with multi-tenancy, RBAC, billing, admin panel, API generation, and workflow automation all included.
Documentation & support 8
Good documentation with examples, though the complexity means there's a learning curve; includes email support.
Customization ease 7
Highly customizable but the extensive feature set means you need to understand the architecture before making changes.
License & pricing value 6
At $499-999, it's expensive but justified for complex B2B needs; still a proprietary license.
What the model rates
Exceptional multi-tenancy and RBAC implementation out of the box Built on Remix which offers excellent performance and developer experience Includes advanced features like API generation, workflow automation, and entity builder
What it holds against it
Higher price point than many alternatives Steeper learning curve due to feature complexity Smaller community compared to Next.js-based alternatives
Visit SaasRock
3
bullettrain.co
Best for Ruby on Rails developers building team-based SaaS applications who value open source and want a mature, battle-tested framework.
An open-source Ruby on Rails SaaS framework with comprehensive team management, permissions, and a sophisticated UI component library.
Tech stack & architecture 8
Ruby on Rails is mature and productive, though not as trendy as JavaScript frameworks; architecture is solid.
Feature completeness 9
Exceptionally complete with teams, permissions, API, webhooks, and a comprehensive UI library all included.
Documentation & support 8
Excellent documentation with detailed guides, though community support is smaller than JS alternatives.
Customization ease 8
Rails conventions make customization predictable and straightforward for experienced Rails developers.
License & pricing value 10
MIT licensed and completely free with no restrictions—exceptional value and true open source.
What the model rates
Genuinely open source under MIT license with no restrictions Extremely comprehensive with advanced team management and permissions Built on Rails which offers unmatched productivity for CRUD applications
What it holds against it
Requires Ruby on Rails knowledge, which has a smaller talent pool than JavaScript Rails deployment is more complex than serverless JavaScript options Smaller community than JavaScript-based alternatives
Visit Bullet Train
4
supastarter.dev
Best for Developers who want to leverage Supabase's backend-as-a-service capabilities with a modern Next.js frontend.
A production-ready SaaS starter built with Next.js and Supabase, offering both app router and pages router versions.
Tech stack & architecture 9
Modern Next.js with TypeScript, Supabase, and Tailwind CSS represents a solid, maintainable stack.
Feature completeness 8
Covers core SaaS needs well with auth, payments, and database, though admin features are more basic.
Documentation & support 8
Well-documented with clear setup instructions and examples, plus Discord community support.
Customization ease 8
Clean architecture makes customization relatively easy, though Supabase coupling limits some flexibility.
License & pricing value 7
Subscription model at $297/year provides ongoing updates but represents recurring cost; proprietary license.
What the model rates
Tight integration with Supabase ecosystem for auth, database, and storage Offers both Next.js App Router and Pages Router versions Clean, modern codebase with TypeScript throughout
What it holds against it
Tightly coupled to Supabase, making it harder to switch backends later Proprietary license with ongoing subscription model for updates Less feature-rich than some competitors in terms of admin tooling
Visit supastarter
5
makerkit.dev
Best for Developers who want to choose their preferred framework while getting a consistent, well-designed SaaS foundation.
A collection of SaaS starter kits available in multiple frameworks (Next.js, Remix, SvelteKit) with Firebase or Supabase backend options.
Tech stack & architecture 8
All framework options use modern stacks with TypeScript, though quality varies slightly between implementations.
Feature completeness 8
Good coverage of core SaaS features including auth, billing, organizations, and admin, though not as deep as specialized options.
Documentation & support 7
Documentation is good overall but consistency varies across framework versions; Discord support available.
Customization ease 8
Well-structured code makes customization straightforward, and you can pick the framework you're most comfortable with.
License & pricing value 7
Subscription at $299/year for updates is reasonable but recurring; proprietary license limits redistribution.
What the model rates
Multiple framework options let you use your preferred stack Clean, modern design with good UI components included Active development with regular updates across all variants
What it holds against it
Maintaining multiple framework versions means features may not be perfectly consistent Subscription model for updates can add up over time Documentation quality varies between framework versions
Visit Makerkit
6
nextlessjs.com
Best for Teams that want full control over their AWS infrastructure and prefer serverless architecture over traditional hosting.
A Next.js and AWS-based SaaS starter kit emphasizing serverless architecture and infrastructure-as-code with full AWS deployment.
Tech stack & architecture 8
Modern Next.js with serverless AWS architecture is solid, though adds infrastructure complexity.
Feature completeness 8
Strong on infrastructure and deployment features, good coverage of core SaaS features, though admin tools are basic.
Documentation & support 7
Good technical documentation but assumes significant AWS knowledge; support is available but community is smaller.
Customization ease 6
Customizing application code is straightforward, but infrastructure changes require AWS expertise.
License & pricing value 7
Pricing is competitive for what's included, especially the infrastructure setup, but proprietary license.
What the model rates
Complete AWS infrastructure setup with CDK/Terraform included Serverless architecture provides excellent scalability Includes CI/CD pipelines and monitoring setup
What it holds against it
Requires AWS knowledge and comfort with infrastructure management Higher operational complexity than platform-based solutions AWS costs are additional and can be unpredictable for beginners
Visit Nextless.js
7
volca.io
Best for Developers who want a genuinely open-source Next.js starter without vendor lock-in or licensing restrictions.
An open-source SaaS boilerplate built with Next.js, TypeScript, and Prisma, focusing on simplicity and developer experience.
Tech stack & architecture 8
Uses modern Next.js, TypeScript, Prisma, and Tailwind CSS—a solid, maintainable stack.
Feature completeness 6
Covers authentication and basic database setup well but lacks billing integration and advanced features.
Documentation & support 6
Basic documentation is available but not as comprehensive as commercial products; community support is limited.
Customization ease 9
Minimal, clean codebase makes it very easy to understand and customize without fighting against opinionated structures.
License & pricing value 10
MIT licensed and completely free—you can use it however you want with no restrictions or costs.
What the model rates
Truly open source under MIT license with no strings attached Modern Next.js stack with TypeScript and Prisma Clean, minimal codebase that's easy to understand and modify
What it holds against it
Less feature-rich than commercial alternatives Smaller community and less frequent updates Limited support options compared to paid products
Visit Volca
8
shipped.club
Best for Indie hackers and solo founders who want to validate ideas quickly with a straightforward Next.js setup.
A Next.js startup boilerplate with a focus on rapid deployment, including authentication, payments, and email functionality.
Tech stack & architecture 8
Modern Next.js with TypeScript and standard libraries like NextAuth—solid choices without unnecessary complexity.
Feature completeness 7
Covers core needs like auth, Stripe payments, and email well but lacks advanced features like multi-tenancy or admin builders.
Documentation & support 6
Documentation covers the basics adequately but isn't as comprehensive as top-tier options; limited support channels.
Customization ease 8
Straightforward codebase without excessive abstraction makes customization relatively easy for Next.js developers.
License & pricing value 8
At around $199, it offers good value for indie hackers, though it's still a proprietary license.
What the model rates
Simple, focused feature set that covers the essentials without overwhelming Good balance of features and simplicity for quick launches Affordable one-time pricing
What it holds against it
Less comprehensive than premium options like Shipfast or SaasRock Smaller community and ecosystem Documentation could be more detailed for complex scenarios
Visit Shipped
9
usegravity.app
Best for Developers comfortable with traditional React and Node.js who want a straightforward, no-frills starter kit.
A Node.js and React SaaS boilerplate with a focus on simplicity and getting to market quickly with essential features.
Tech stack & architecture 6
Uses React and Node.js which are solid but the separate frontend/backend approach feels dated compared to modern full-stack frameworks.
Feature completeness 7
Covers the basics of auth, payments, and database well but lacks advanced features like multi-tenancy or admin builders.
Documentation & support 7
Adequate documentation for getting started, though not as comprehensive as top-tier options.
Customization ease 8
Simpler architecture actually makes it easier to customize if you understand traditional React/Node patterns.
License & pricing value 8
At around $149, it offers good value for the features provided, though still proprietary.
What the model rates
Simpler architecture that's easier to understand than meta-frameworks Includes essential SaaS features without overwhelming complexity Lower price point than many competitors
What it holds against it
Uses older patterns (separate frontend/backend) rather than modern full-stack frameworks Less comprehensive feature set compared to premium options Smaller community and less frequent updates
Visit Gravity
10
divjoy.com
Best for Developers who want flexibility in choosing their exact tech stack while still getting a head start on common SaaS features.
A React codebase generator that lets you customize your tech stack choices before downloading, supporting multiple frameworks and services.
Tech stack & architecture 7
Quality depends on your choices, but the generated code uses modern patterns; flexibility is both strength and weakness.
Feature completeness 6
Covers authentication and basic UI components well but lacks advanced SaaS features like billing integration or admin panels.
Documentation & support 6
Documentation covers the generator and basic usage, but you're largely on your own after code generation.
Customization ease 9
Since you generate exactly what you want upfront, customization is straightforward with minimal unwanted code.
License & pricing value 8
At $59-199, it's affordable and you own the generated code outright with no restrictions.
What the model rates
Unique generator approach lets you pick your preferred frameworks and services Supports multiple React frameworks (Next.js, Gatsby, Create React App) Clean, well-organized generated code
What it holds against it
Generated code approach means less ongoing updates compared to maintained boilerplates Feature set is more basic than specialized SaaS starters Support is limited after initial generation
Visit Divjoy
How to rank higher on this list
The model can only score what it already knows about you. For each criterion, this is what it says would raise its score:
Tech stack & architecture. Use current stable versions of popular frameworks (Next.js, React, TypeScript, Prisma, etc.), demonstrate clear separation of concerns, and publish architecture documentation showing thoughtful design patterns rather than quick hacks.Feature completeness. Ship with fully working authentication (including social logins and magic links), Stripe subscription billing with webhooks properly handled, team/organization support, role-based permissions, a functional admin panel, email templates, and a polished UI—not just placeholder code or TODO comments.Documentation & support. Provide comprehensive setup guides, deployment tutorials for major platforms (Vercel, Railway, AWS), clear explanations of the codebase structure, video walkthroughs, and either active community support (Discord/GitHub discussions) or responsive paid support channels.Customization ease. Write clean, well-commented code following standard conventions, use modular architecture that allows swapping components, provide examples of common customizations, and avoid over-abstraction or proprietary patterns that lock you into specific approaches.License & pricing value. For open-source options, use truly permissive licenses (MIT, Apache 2.0) without hidden restrictions. For paid options, offer transparent one-time pricing without recurring fees, unlimited project usage, and lifetime updates—making the total cost of ownership clear and reasonable compared to building from scratch.
How to improve your AEO covers the general playbook.