billingsdk.com
BillingSDK is an open-source React and Next.js component library for SaaS billing and payments. It offers ready-to-use, customizable components for subscriptions, invoices, usage-based pricing and billing - fully compatible with Dodo Payments and Stripe.
usepaykit.dev
Unified payments SDK for builders — handle checkout, billing, and webhooks across Stripe, PayPal, Adyen, and regional gateways with a single integration.
developer.paddle.com
Drop-in components for building checkouts, pricing pages, and subscription management screens using Paddle Billing.
saaskit-theta.vercel.app
10 essential shadcn/ui components for B2B SaaS: Pricing, Billing, Usage, and Onboarding. Minimalist Soft Brutalist design.