How do I choose a local provider?
So while it's admirable that some SEO companies that have been around for 10 years or more, it shouldn't necessarily be a deciding factor when choosing between two different agencies. Why? Because while these companies may indeed be experienced, SEO changes so rapidly that what used to work then is not likely to work now. Additionally, before Google's massive crackdown on link schemes in 2012, older SEO agencies likely picked up a slew of bad habits along the way. So instead of traditional research, I'd recommend you check if your prospective agency is consistently ranking in your target market by Googling "YourCity SEO" (without quotes). What you'll notice, and this will change from time to time, is that the best options are consistently at the top of the results, while the worst options are those who are not playing by Google's rules as seen in the following excerpt taking from a ranking Durham SEO company's website:
We can create a network of locations that will endorse your site with backlinks so that Google will see your products or services.