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How to See Competitors’ Amazon Ads: Ad-Spy Tools Compared (2026)

You can see which brands advertise on a keyword, and which keywords a competitor’s ASIN advertises on. You cannot see their bids, budgets, or real ad spend — no Amazon competitor ad spy tool has those numbers, because Amazon does not publish them. Every tool in this category estimates paid activity from what is publicly visible in Amazon search results. That is a useful signal, not a window into someone else’s ad console. This guide draws that line, then compares the tools that do the job — SmartScout AdSpy, SellerSprite Ads Insights and Helium 10’s Cerebro — with pricing checked 2026-07-27.

Two mismatches to clear first: there is no Amazon equivalent of the Meta Ad Library, and the famous “ad spy” brands — BigSpy, AdSpy, Adyntel — index social and display networks, not Amazon’s sponsored placements. This page covers paid visibility only; for the organic side, see our Amazon keyword tools comparison.

What You Can and Cannot See

None of this is a vendor limitation you can pay your way out of — it is what Amazon does and does not expose.

The usual overclaim blurs the third row into the last: a tool might tell you a rival holds the top sponsored slot for “stainless steel water bottle” 60% of the time, but no tool can tell you whether they pay $0.85 or $1.85 a click for it.

Why Generic Ad-Spy Tools Do Not Work Here

The big ad-spy platforms are creative libraries for social and display. BigSpy’s homepage lists its coverage as Facebook, Instagram, TikTok, YouTube, Google (AdMob), Twitter, Yahoo, Pinterest and Unity, and its FAQ names five plans — “Free, Basic, Pro, Group Buy, and Enterprise” (checked 2026-07-27). Its database references e-commerce sites including Amazon, but as destinations ads point to — not as a source of Amazon’s sponsored placements. A social ad-spy tool shows the TikTok creative a competitor runs to drive traffic to their listing; an Amazon-specific tool shows who bids against you inside Amazon search.

And no, there is no Amazon Ad Library

Amazon runs no open, global ad transparency library comparable to Meta’s or Google’s. The exception is regulatory: under the EU Digital Services Act, Amazon Store is a designated Very Large Online Platform and must maintain a public advertisement repository for its EU interfaces. Amazon contested that obligation and, per third-party reporting, the interim suspension was reversed in March 2024 (TechCrunch, 2024-03-27; Search Engine Land) — an EU-scoped compliance archive, not a keyword-level research tool.

The Free Baseline: Read the SERP Yourself

Every paid tool here is an automated version of what you can do by hand in fifteen minutes. Do it once before buying anything.

1. Search your target keyword in a logged-out private window, so your own history does not shape results.
2. Record every ASIN labelled “Sponsored” — top row, mid-page block, bottom of page 1 — with brand, price and main image angle. Repeat for page 2.
3. Capture the Sponsored Brands banner at the top. Its headline and the Store it links to reveal which SKUs a brand treats as heroes.
4. Open a close competitor’s detail page and log the sponsored carousels on it. Those are product-targeting ads: the brands there bid on that ASIN and can bid on yours.
5. Repeat on a schedule — same keyword, same time of day, three times a week. The auction re-runs constantly, so one snapshot is noise; ten is a pattern. Log it alongside your rank tracking so paid movement stays separable from organic movement.

This gives you the roster of advertisers per keyword — but no history, no share-of-voice percentages, and no reverse view (every keyword for one ASIN). That is what the tools sell.

Amazon’s Own Data: Anonymised, but First-Party

If you already advertise, Amazon gives you one genuinely first-party competitive metric, free. The search term impression share report for Sponsored Products shows your account-wide impression share per search term compared with other advertisers. Amazon’s own example: 20% impression share for a term on a date means you won 20% of all Sponsored Products impressions for it that day. The companion metric, search term impression rank, is positional — ranking third means you earned the third-highest impressions for that term (Amazon Ads documentation, checked 2026-07-27).

The catch is by design: the report ranks you against other advertisers without identifying them — it carries no advertiser-identity field. If it shows that four advertisers out-impressioned you, it will not name those four. Pair it with your manual SERP log and the gap mostly closes — the report says how far behind you are, the SERP says who is ahead. Brand Registry sellers also get Brand Analytics’ Search Query Performance (click and conversion share for top terms) — see our Amazon Brand Registry guide.

The Best Amazon Competitor Ad Spy Tools, Compared

SmartScout and BigSpy checked 2026-07-27; SellerSprite and Helium 10 checked 2026-07-20. Every “competitor keyword” figure here is estimated from public search results, not from Amazon’s ad systems.

SmartScout AdSpy — the most explicit Amazon ad-spy product

SmartScout is the only tool here marketing a dedicated Amazon PPC competitor-research module by name. Its product page claims AdSpy reveals “all of a brand’s paid search terms and the keyword win rates for every sponsored page position,” across Sponsored Products, Sponsored Brands and Sponsored Video (checked 2026-07-27). The named fields are unusually specific — a “complete list of paid search terms on any brand or product,” a Top Spot Win Rate for “the top-left sponsored position,” plus Top Group, Sponsored Brand and Sponsored Video win rates and an Estimated Searches figure.

Credit where due — SmartScout states the boundary itself: “AdSpy uses large-scale Amazon SERP data to estimate paid keyword activity and win rates. While Amazon does not publish exact ad spend, AdSpy provides reliable directional insights based on real ad visibility.” That is the honest version of what this whole category does.

• Pricing: Basic $29/mo ($25/mo annually), Essentials $97/mo ($75/mo), Business $187/mo ($158/mo annually), Enterprise custom (checked 2026-07-27, rendered pricing page). Which tier unlocks AdSpy is not stated in a way you can rely on. The Business plan card lists eleven features and AdSpy is not among them; the two ad-data line items that are named — “Competitor Ad Data” and “Competitor Ad Spend” — both sit under Enterprise (custom pricing). SmartScout’s own AdSpy FAQ says only that “AdSpy is included in SmartScout plans, with access levels depending on your subscription tier,” without naming a tier. Confirm the tier with SmartScout before subscribing for this feature. A 7-day money-back guarantee, not a free tier.
• What to watch: tier-gating recurs in third-party reviews. One Trustpilot reviewer wrote the site “clearly states that the basic plan offers ‘access to all brand data and features,’ but when you purchase it, you can only see 20% of the data” (third-party review, 2025-11-10). Confirm exports are included at your tier before committing.
• Best for: brand owners and agencies needing share of voice by sponsored position.

Sources: SmartScout AdSpy · pricing · review 2025-11-10

SellerSprite Ads Insights — campaign structure, cheapest entry

SellerSprite comes at it differently: rather than win rates, Ads Insights reconstructs the shape of a rival’s advertising. Its documentation says the feature “displays the overall structure of an Amazon listing, containing the ad campaign, ad group, and search term of a listing” — how many campaigns and ad groups sit behind an ASIN, whether they are Automatic or Manual, and which match types are in play (checked 2026-07-27).

Crucially, SellerSprite publishes its sampling boundary in plain language: the analysis is “based on the Amazon sponsored ads displayed on the first three pages of the search results,” so long-tail terms that never surface there will not appear. It also notes that “different variants of the same listing will have the same query result” — variant-level differences are not resolved.

• Pricing (checked 2026-07-20): Basic $39/mo, Standard $79/mo, Advanced $129/mo, VIP $189/mo, roughly 16% off annually. A 3-day trial rather than a free tier, and a 50-exports-per-day cap on all plans.
• Best for: reverse-engineering campaign architecture, not just keyword lists, at the lowest entry price here.

Source: SellerSprite — Uncover Competitors’ Amazon PPC Keywords

Helium 10 Cerebro — sponsored data bundled into reverse ASIN

If you already pay for Helium 10, you may not need a second purchase. Cerebro is primarily a reverse-ASIN keyword tool, and Helium 10’s knowledge base publishes an article titled “Cerebro Video: How to Find All the Keywords an Amazon Product Is Advertising For” — the sponsored view is documented as part of the product (title and URL verified 2026-07-27 via search index; the page body returns 403 to automated retrieval).

One caveat about presentation: Cerebro’s public marketing page sells it as a way to “see the exact search terms that bring shoppers to your competitor’s listings” and names only organic rank, search volume and title density as filters (checked 2026-07-27). The advertising angle lives in support docs, not the sales page — so verify the sponsored columns inside a trial before signing an annual plan.

• Pricing (checked 2026-07-20): a free plan with capped extension access; Platinum $129/mo ($99/mo annually), Diamond $359/mo ($279/mo), Enterprise from $1,499/mo. You can start on the Helium 10 free plan and test Cerebro first; our Helium 10 review covers the wider suite.
• Best for: existing Helium 10 subscribers who want competitor ad signal without a second bill.

Sources: Helium 10 KB — Cerebro · Cerebro product page

Enterprise platforms

Pacvue’s commerce platform page names “Market & Competitive Insights” but publishes no pricing — access runs through a demo request (checked 2026-07-27); third-party reviewer summaries (G2, undated) describe a $500-plus monthly minimum — or a percentage of ad spend, whichever is higher — and a steep learning curve (paraphrased). Perpetua draws heavy negative Trustpilot volume about annual lock-ins and billing: of the 21 Perpetua Trustpilot reviews in our sample, 20 are one-star. Both are bought for campaign automation at catalogue scale, with competitive dashboards as one module — the wrong shape of purchase if competitor research is your only need.

Which One Should You Pick?

• Spending nothing: run the manual SERP log above three times a week, plus Amazon’s free search term impression share report.
• Already on Helium 10: start with Cerebro’s sponsored view; verify the columns in a trial first.
• Cheapest dedicated ad research: SellerSprite from $39/month — best if you want campaign structure and can live with three-page sampling.
• Share of voice by sponsored position: SmartScout AdSpy — confirm the required tier first; the named ad-data features sit at Enterprise (custom).
• Large catalogue, agency team: evaluate Pacvue or Perpetua on the automation, not the spy features.

Whatever you pick, the output is an input, not a decision: feed the competitor keyword list into your own campaign structure and judge it on your numbers. The Amazon PPC playbook has the profit math, and the ACoS guide the threshold deciding whether a rival’s keyword is worth taking.

Frequently Asked Questions

Can you see a competitor’s Amazon ad spend?

No. Bids, budgets and actual spend live inside the advertiser’s account and Amazon does not publish them. Tools showing “ad spend” model it from public search-result visibility — SmartScout says as much in its own FAQ (checked 2026-07-27). Treat any spend figure as an estimate with a wide error bar.

Is there an Amazon ad library like the Meta Ad Library?

Not in any usable, global form. Amazon runs no open ad transparency library for its storefront. Under the EU Digital Services Act it must maintain a public advertisement repository for EU interfaces — a compliance archive, not a seller research tool (checked 2026-07-27).

What is the best Amazon competitor ad spy tool?

For share-of-voice data by sponsored position, SmartScout AdSpy is the most explicit product, but confirm which plan actually includes it — the named ad-data features are listed at Enterprise (custom pricing), and the $187/mo Business card does not list AdSpy. For the cheapest entry, SellerSprite from $39/month reconstructs a rival’s campaign and ad-group structure. If you already subscribe to Helium 10, Cerebro’s sponsored view may cover you without a second bill (SmartScout checked 2026-07-27; the other two 2026-07-20).

Can I find out which keywords a competitor is bidding on?

You can get a strong estimate. Reverse-ASIN tools sample Amazon search results at scale and report the terms where an ASIN appears in sponsored placements — the keyword list, not the bid. Sampling boundaries matter: SellerSprite documents that it reads sponsored ads from the first three pages of results, so deep long-tail terms can be missed.

Do BigSpy, AdSpy or Adyntel work for Amazon ads?

Not for on-Amazon placements. Those platforms index social and display networks — BigSpy’s own coverage list is Facebook, Instagram, TikTok, YouTube, Google (AdMob), Twitter, Yahoo, Pinterest and Unity (checked 2026-07-27). Right tool for a competitor’s off-Amazon creative; wrong tool for who bids against you in Amazon search.

The Bottom Line

Seeing competitors’ Amazon ads is real, but narrower than the marketing implies. You can reliably learn who advertises on a keyword, which keywords an ASIN advertises on, and how often a brand wins the top slot — not what they pay. The tools worth money are the ones that state that boundary themselves; SmartScout and SellerSprite both publish their data sources and limits.

Start free: log the Sponsored placements on your top ten keywords for two weeks and pull the search term impression share report. If that log changes your bidding decisions, buy the tool that automates it. If it does not, no subscription will fix that — the leverage is in your own keyword research process, not a rival’s keyword list.