Top 5 Free Open Source SaaS Starters in 2025

The article discusses five open-source starter kits for building B2B SaaS applications in 2025, providing options for different tech stacks and enterprise requirements.

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Why it matters

These open-source SaaS starters can help founders save significant time and money when building B2B SaaS applications, by providing pre-built infrastructure and integrations.

Key Points

  • 1Provides alternatives to paid boilerplate solutions or building infrastructure from scratch
  • 2Covers options for Go, JavaScript, Python, and enterprise-focused starters
  • 3Highlights features like integrated billing, authentication, RBAC, and AI capabilities

Details

The article presents five open-source SaaS starter kits that can help founders save time and money when building B2B SaaS applications. The options cater to different tech stacks and enterprise needs, including a high-performance Go-based starter with pre-integrated billing, authentication, and AI capabilities; a full-stack JavaScript option built on the Wasp framework; a Python-focused Django starter; a minimalist Next.js-Stripe-Supabase starter; and an enterprise-grade starter with SAML SSO support. The author recommends choosing the starter that best fits the specific requirements of the SaaS product, whether it's raw performance, a JavaScript ecosystem, Python, or enterprise-level security features.

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