Which type of proxies for this task?

I am currently using a locally installed SEO suite and need to do a lot of ranking checks, yet for some time now, I am urged to enter captchas every second time a kw is checked - with over 1000 kws this is becoming a real pain in the neck.
So, as I can setup proxies in that software to use for checking the rankings, which type of proxies would I need and where to get them? Didn't play a lot with proxies, so forgive me if that's a noob question.

Thanks!

Perhaps a quality shared proxy provider or if this is a process you need to do frequently look for a private IPV4 provider. Many wishes.