Texas runs everything through HealthCare.gov
Texas has no state-based exchange, so Houston residents buy Marketplace coverage through the federal HealthCare.gov platform. Houston is also one of the most competitive Marketplace areas in the country: Harris County shoppers typically see a large number of plans from multiple carriers, which is good for price but genuinely hard to sort through on your own.
That volume is the main reason a broker helps here. Instead of scrolling dozens of near-identical silver plans, you get a short list built around your doctors, your prescriptions, and your budget.