
Saas UI
A purpose-built toolkit for building high-quality React apps
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Explore 105 boilerplates in this category. Find the perfect starting point for your next project.
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A purpose-built toolkit for building high-quality React apps
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Full-stack, production ready Next.js SaaS boilerplate and starter kit
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Build a fully featured SaaS app with Primate.js and Svelte
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The complete Nuxt starter kit to build a robust and market-ready SaaS
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A fully-loaded SvelteKit boilerplate to rapidly build and launch your unicorn SaaS, AI or web startup
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The ultimate, modern, open-source Next.js template with pre-configured authentication and database integration
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A SaaS Starter Kit for building production-ready React applications
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Ready-to-use SwiftUI boilerplate for building modern iOS applications
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The Remix SaaS Boilerplate with 25+ built-in features to build, market, and manage your B2B app.
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Payment provider selection determines your billing architecture, from checkout flows to subscription lifecycle management. Each provider offers distinct approaches to webhook systems, tax compliance, and failed payment handling. Our collection features provider-specific boilerplates that leverage each payment gateway's API capabilities and compliance features.
Payment-integrated boilerplates provide provider-specific webhook handlers with cryptographic signature verification, implement provider-native subscription management APIs with proper state synchronization, leverage provider-specific features (Stripe Tax, PayPal Reference Transactions), and include provider-optimized retry logic and dunning flows. Each integration follows its provider's security and compliance guidelines.
Browse our collection of 105 payments boilerplates to find the perfect starting point for your next SaaS project. Each boilerplate has been carefully reviewed to ensure quality, security, and production-readiness.
Payment integrations implement provider-specific APIs: Stripe uses Payment Intents and Checkout Sessions, PayPal implements Orders API, Paddle uses Checkout API. Each includes webhook handling, subscription management, customer portals, and proper error handling with provider-specific retry logic.
Webhook implementations verify cryptographic signatures to ensure authenticity. Each provider's webhook system is handled differently: Stripe validates signatures with timestamp checks, PayPal uses certificate validation. All include event deduplication, asynchronous processing, automatic retries, and comprehensive event type handling.
Subscription features include multi-tier plans, trial periods, prorated upgrades/downgrades, metered billing, usage tracking, and automatic renewal. Each provider's subscription model is implemented: Stripe's subscription schedules, Paddle's subscription management, PayPal's billing agreements with proper state synchronization.
Failed payment handling includes provider-specific retry schedules, automated customer notifications, grace periods, and payment method update flows. Stripe uses Smart Retries, PayPal implements Reference Transactions. All include dunning email sequences and automatic service suspension after final retry failures.
Tax and compliance features use provider-specific solutions: Stripe Tax for automatic calculations, Paddle handles EU VAT automatically, PayPal includes tax APIs. All implementations follow PCI DSS Level 1 standards, implement SCA for European customers, and generate compliant invoices with proper tax documentation.