Azure is a cloud computing service for building, testing, deploying, and managing applications and services through Microsoft-managed data centers.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Plaid is a fintech company that facilitates communication between financial services apps and users' banks and credit card providers.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Stripe offers online payment processing for internet businesses as well as fraud prevention, invoicing and subscription management.