Stripe
The new standard for online payments. Stripe is the best platform to run an internet business. For forward-thinking businesses all over the globe, we handle billions of dollars annually. Stripe creates the most flexible and powerful tools for internet commerce. Whether you’re creating a subscription service, an on-demand marketplace, an e-commerce store, or a crowdfunding platform, Stripe’s meticulously designed APIs and unmatched functionality help you create the best possible product for your users. Stripe is helping millions of innovative technology companies scale faster and more efficiently than ever before. We believe that payments is a problem rooted in code and not finance. We are obsessed with finding elegant, modular abstractions that allow for robust, scalable and flexible integrations. Stripe is easy to use because we remove unnecessary complexity and extraneous detail.
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FusionAuth
FusionAuth is the authentication and authorization platform engineered for developers who demand flexibility and control. Built from the ground up to integrate with any stack, every feature — from user registration to MFA and SSO — is exposed via a modern, well-documented API.
Support for every major identity protocol is included out of the box: OIDC, SAML, OAuth2, JWT, passwordless login, social sign-on, and more. Whether you’re building a greenfield app or retrofitting auth into a legacy system, FusionAuth adapts to your use case — not the other way around.
Need compliance? FusionAuth helps you meet GDPR, HIPAA, and COPPA standards quickly and reliably.
Deploy it your way: install on Linux, Windows, macOS, Docker, or Kubernetes — or go with FusionAuth Cloud, our managed SaaS hosting. No black boxes. No vendor lock-in. Just powerful, customizable auth that works the way you do.
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Launch Leopard
Launch Leopard serves as a SvelteKit boilerplate aimed at accelerating the creation of tools, SaaS platforms, and AI-driven applications by offering a well-rounded collection of pre-configured technologies. By combining SvelteKit with TypeScript, it establishes a solid framework for applications and provides user authentication through Auth.js or Supabase, including options for social logins with Google, GitHub, and Apple. Additionally, the platform streamlines payment processes through Stripe, which simplifies subscription management and invoicing tasks. For efficient data operations, it utilizes Drizzle ORM, compatible with any SQL database, allowing for quick and lightweight query execution. The user interface is designed using TailwindCSS and DaisyUI, incorporating ready-to-use components such as modals, navigation menus, dropdowns, pricing tables, and hero sections to enhance user experience. Email services are efficiently handled by Loops, facilitating the delivery of both transactional and promotional emails, including login links and invoices. Furthermore, Launch Leopard extends its functionality by supporting AI integration via the OpenAI API, making it a versatile choice for modern development needs. This comprehensive setup allows developers to focus more on building unique features rather than getting bogged down by initial configurations.
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Just Ship
Just Ship is a completely free and open-source SaaS starter kit crafted with Svelte 5 and SvelteKit, aimed at streamlining web application development by offering a range of essential functionalities right from the start. It features user authentication through magic links and Google social login, while user information is securely stored in a Turso database. The kit comes with more than 30 pre-designed styles powered by daisyUI, ensuring support for dark mode and providing various landing page components to enhance quick UI development. Integrated payment processing via Stripe allows for effortless payment acceptance and webhook management. Analytics are effectively handled through PostHog, which includes configurations that circumvent ad blockers by using Vercel as a proxy, alongside support for A/B testing and feature flags to optimize user engagement. Moreover, it simplifies SEO tag management through the load function and enables email communications via Postmark, with deployment made easy through Vercel, ensuring a comprehensive toolkit for developers looking to launch their applications efficiently. This all-in-one solution not only accelerates the development process but also empowers developers with the tools they need to create robust web experiences.
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