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.

Notion Ultimate Subscription System - This template is designed to help you keep track of your subscriptions, get reminders before the renewal date, see a timeline for your subscriptions, and convert the currency of any subscription to your desired currency.

TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type

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

Stripe Billing - A set of tools for billing and subscriptions

SplitGenie - Splitgenie is the safest all-in-one solution to share your digital subscription plans and your monthly expenses.