Depending on the health insurance company, Texas individual and family health insurance rates for couples can be based on the age of the youngest person on the policy. Some couples with an age difference of several years may find they save money by applying for the same plan rather than individually. Couples that are only a few years apart might be able to reduce their total costs by applying for separate health insurance plans. If you decide to apply for a health insurance plan as a couple, make sure the plan you choose covers the benefits both of you need.
There are other online brokerages, both large and small, that can help you sort out the individual market health insurance options available in your area. Most of them can show you plans that are available in the exchange as well as options that are only available outside the exchange (no subsidies are available outside the exchange, but as noted above, you're probably not eligible for subsidies anyway, if you have access to an employer-sponsored plan).