Robinhood - Free stock trading service.
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.
Alpaca Data API - Free real-time stock market data API
Bonsai Payments - Simple invoicing & payments for small businesses and freelancers. Collect instant payments or set up recurring payments. Get paid via credit card or bank deposit in 100+ currencies.
Ellevest - An investing platform built for women
Razorpay International Payments - Easiest way to accept payments in 100 currencies 🇮🇳