I’ve tried SpyFu, and it’s pretty good for getting a ballpark figure on ad spend. It’s not perfect, but it’s better than nothing.
If you’re looking for free options, try using the Google Keyword Planner. It won’t give you competitor budgets, but it’ll show you how competitive certain keywords are, which can give you some clues.
If you’re looking for free options, try using the Google Keyword Planner. It won’t give you competitor budgets, but it’ll show you how competitive certain keywords are, which can give you some clues.