If you are starting your Amazon business you might want to start with free tools.

Here is a list of all Free Jungle Scout Alternatives

Helium 10: Free account

You can sign up for a free Helium 10 account—no credit card details required! The downside is that the free account is limited to one free use for each tool per day.

However, this is a great way to try out all their tools and determine if Helium 10 is worth the investment. Suppose you are ready to upgrade from the free plan to one of their paid membership. Make sure to use a discount coupon!
Unicorn smasher: 100% Free

Unicorn Smasher is a free Chrome extension similar to the Jungle Scout Extension.

However, the major downside to this tool is that it is not very accurate. When comparing Unicorn Smasher to Jungle Scout, we discovered that Jungle Scout is 95% accurate, while Unicorn Smasher is only 53% accurate in estimating sales numbers.
Jungle Scout Free Sales Estimator Tool

Yes, Jungle Scout actually offers a free alternative to their own tools. You can use their sales estimator 100% for free, unlimited uses. You would have to put in the BSR & category per product manually you would like the sales estimate for. So it’s a lot of extra work, but free 🙂
Google Keyword Planner.

With the Google Keyword Planner, you can’t really do product research on a product-based level. But you can compare different niches with each other! Let’s say you want to know if the term Garlic Press is searched more often than Garlic Mincer. You can check this for free with the Google Keyword Planner.