The sheer amount of data they have is incredible. I have watched SpyFu since it first came out, and they have only gotten better. I use their data all the time to help with my clients' advertising and our own. Review collected by and hosted on G2.com.

Sometimes it's confusing where to find certain pieces of data, and their constant attempts to upsell me to their other product are a bit annoying. I don't know if their other products are good or not, but I don't want it in my face constantly. Review collected by and hosted on G2.com.