Apache is a free and open-source cross-platform web server software.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
PHP is a general-purpose scripting language used for web development.
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.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.