In a $500M category, a one-point drop in Amazon market share is $5M in lost revenue. The cause could be a competitor’s promotion, a two-week stockout on one of your ASINs, or a new brand launching at a lower price. Each calls for a different response, and a share report alone won’t tell you which one you’re facing.
Share Diagnosis, one of Jungle Scout’s AI Solutions, finds the cause. It tests the common drivers on Amazon, from pricing and promotions to in-stock rates, new launches, and individual competitors, then ranks them by how much revenue each one moved.
When share goes up, it also tells you whether the gain is structural, like a lasting price advantage, or fragile, like a competitor’s temporary stockout.
Questions you can ask about Amazon market share
Ask about your own brand, a single rival, a set of competitors, or a whole category:
- “Why did we lose share in [category] last quarter? Is it price, distribution, or a specific competitor?”
- “Why is [brand] losing ground in [category]?”
- “Which of [brand A], [brand B], and [brand C] took the most share from us, and why?”
- “Are we losing share across [category], or mostly to one competitor?”
- “What’s driving our share gain in [category] this year?”
What it looks like in practice
Suppose your brand lost share in its main category over the past six months. You open Ask Cobalt, or an AI tool like Claude or ChatGPT connected through Jungle Scout MCP, and ask why.
The answer leads with the verdict: how much revenue changed hands, separate from the category’s own growth. A chart shows each brand’s net gain or loss in dollars, and the response names the products behind most of the shift, such as a competitor’s relaunch or your top ASIN growing slower than the category. It also gives you insight into where to focus first.
From there, ask follow-up questions, such as whether a competitor’s gain looks structural or fragile. Once you understand why share moved, open Product Performance to see which ASINs drove the shift. To see how your brand stacks up against that competitor on price, reviews, and growth, run Competitive Benchmarking.
How to access these insights
Already a customer? Ask Cobalt is the AI assistant built into Jungle Scout Cobalt, so you can use it today with no separate AI tool to set up.
Prefer your own AI tool? Connect Jungle Scout MCP to Claude, ChatGPT, Gemini Enterprise, or Microsoft Copilot, where Share Diagnosis runs as the share-diagnosis skill.
Not a customer yet? Get a demo to find the right AI Solution for your team.
