HUB certification comes from the Texas Comptroller and is free. The HUB program's goals and good-faith-effort rules apply mainly to state agencies (Government Code chapter 2161).
What it means for county work
Texas counties aren't bound by the state HUB program, but many have their own historically underutilized or minority and women-owned business policies, and some accept HUB certification or certifications from regional agencies. Check each county's purchasing page.
Is it worth getting?
Yes, if you also sell to state agencies, universities or large cities and counties with diversity programs. Prime contractors bidding on state work also look for HUB subcontractors to meet subcontracting plans.