It's one of many detergent additives that works well. I don't really think at this point there's really any one king of the hill. There are a number of top quality additive makers including Chevron, BASF, Afton, Lubrizol, etc. Any fuel marketer can buy a top quality additive or even have one custom made (like Costco by Lubrizol).
But what kind of Techron? The name refers to everything from Chevron's bulk fuel additive in pump fuel, as well as several different pour-in additives.