Stripe Billing Customer Portal - Stripe-hosted page for customers to manage subscriptions

thirdweb - thirdweb is an ecosystem of SDKs, dev tools, and dashboards that help teams build and manage web3 apps. Deploy custom or pre-built contracts to ETH, MATIC, AVAX, & more.

Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.

SmartContract.com - ChainLink - Connect Smart Contracts to your Applications and Data

Recurpay - Recurpay is a subscription SaaS app for businesses that automates recurring billing.

Cues.sg - Cues is a website that generates code for your own smart contracts and Web 3.0 apps, in a simple 3 step process.