CenterPoint Intelligent Energy Solutions LLC, IES, which manages TrueCost, is not the same legal entity as CenterPoint Energy Resources Corp. (CERC) or CenterPoint Energy Houston Electric, LLC (CEHE), nor is IES regulated by the Railroad Commission of Texas or the Public Utility Commission of Texas. You do not have to buy products or services from IES in order to continue to receive quality regulated services from CERC or CEHE.
When it comes to the electricity itself, there is no difference at all. A cheap electric supply is the same electricity, it's simply provided by a new supplier (unless you opt for green energy - more on that here). As suppliers buy and generate different sets of energy they also have different prices. What's more, you might be on a tariff that is simply more expensive, such as a standard tariff. If you decide to switch electricity don't equate a lower price with worse service.
Since 2002, the majority of Texans have had to choose their own Retail Electric Provider (REP) – the middleman that buys electricity wholesale, then sells it to you, the consumer. According to the Public Utility Commission of Texas’ 2017 report, the Lone Star state is “the national leader in competitive residential, commercial, and industrial offerings,” which means there are well over 200 providers bidding for your attention.
Then, in 2002, Texas deregulated the electricity market and everybody cheered! Except that, sure, deregulation opened up the market to competition that may (or may not) have resulted in lower rates, but it introduced a whole host of other issues. These issues may not have been factors before but now they’re critical when you’re on the look-out for cheap Houston electricity providers.