Best Product Market Research Software on eBay & Amazon

Hi,
I'm using the following solutions in order to increase my online stores - What's your experience with these companies? Do you like them? What software do you find the most useful?

1. Algopix
2. Terapeak
3. Jungle Scout
4. Feedvisor

Different solutions - each company focus on a different marketplace (besides Algopix that combines both eBay & Amazon).

I really liked the data I got from Terapeak but the bulk analysis doesn't work so well (it works on Algopix, but limited to 200 products...

Best Product Market Research Software on eBay & Amazon

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