manta.com will often times have the bare bones information. Things like owners name, year founded, industry, and # of employees.
Another place is via HireAggies.com. Once you log into AggieNetwork,com hover over the "Career Tools" link roughly right/center at the top of the page and click "Hire Aggies"
Once in the Hire Aggies, page scroll down a bit and click on the "Career Shift" link on the right hand side. Then click on the "my companies" tab and enter the company.
The information in Career Shift goes beyond Aggies only. If the company is new or very small it may not have anything. If you know some of the key people their names may come up in Career Shift if it hasn't been too long since they left their position.
Sounds like you are mulling over a potential opportunity? Since you know it is not spam, reach out and ask a bunch of questions. If you are currently employed you have nothing to lose.
Hopefully one of these sources gets you some info.