Before the advent of the World Wide Web in the early 1990s, several online services were already available. They did not (initially) use TCP/IP and were accessed directly over the phone line or via a time sharing network by use of a modem instead of over the internet. They mostly disappeared after 1995 due to the internet growth to widespread use.
As the web gained popularity in the world mainly thanks to the invention of HTML and the massive success of Netscape Navigator, many companies were born directly on the web, where they offered useful services such as directories, search engines, news streams, online shopping, blogs, shared storage, versioning systems and free and paid software downloads. These companies have been incredibly successful and many of them are today between the biggest companies on earth.