The 7 Best Amazon
Keyword Research Tools of 2026, Free & Paid
Our 2026 Testing Methodology
160+ hours testing keyword tools across 4 active accounts. We scored each tool based on search volume accuracy, reverse ASIN depth, keyword suggestions quality, and marketplace coverage.
At a Glance: The 2026 Top Picks
| Rank | Tool | Best For | Score | Price | Trial |
|---|---|---|---|---|---|
| #1 | EDITOR'S CHOICE | Reverse ASIN + Discovery | 9.5/10 | From $99/mo (annual) | Free plan (limited) |
| #2 |  Jungle Scout |
Keyword Scout Integration | 9.1/10 | From $49/mo | 7-day money-back |
| #3 |  SellerSprite |
Multi-Marketplace Coverage | 8.6/10 | From $39/mo | 3 days |
| #4 |  DataDive |
Keyword Universe & Clustering | 8.5/10 | From $39/mo | No free trial |
| #5 |  MerchantWords |
Historical Search Data | 8.4/10 | From $35/mo | Check website |
| #6 |  KeywordTool.io |
Google + Amazon Keywords | 8.2/10 | From $88/mo | 30-day money-back |
| #7 | Keywords.am | Free Keyword Discovery | 8.0/10 | Free / from $39/mo | Free tier |
Helium 10
stars CATEGORY LEADERHelium 10's Cerebro and Magnet remain the industry gold standard for Amazon keyword research. No other tool matches their depth of reverse ASIN analysis.
Cerebro reveals exactly which keywords competitors rank for and their relative position. Magnet generates thousands of keyword suggestions from seed terms with accurate search volume estimates. The 2026 update added 'Keyword Clustering' that groups related terms automatically for smarter listing optimization.
add_circle Pros
- Most accurate reverse ASIN data (Cerebro)
- Keyword clustering for listing optimization
- Integrates with listing builder and PPC
remove_circle Cons
- Premium pricing for full access
- Data volume can be overwhelming without experience
Key Strengths
Jungle Scout
Jungle Scout's Keyword Scout integrates directly with product research data, so you see keyword opportunity alongside demand and competition in the same workflow. For sellers using Jungle Scout for product research, the keyword tools add minimal extra cost while eliminating the need for a second subscription.
add_circle Pros
- Keyword data integrated with product research workflow
- Rank Tracker included for monitoring position over time
- No extra subscription if already using Jungle Scout
remove_circle Cons
- In our testing, keyword database is smaller than Helium 10 Cerebro
- Less historical search volume data than MerchantWords
- Limited clustering and topic grouping
Key Strengths
SellerSprite
8.6/10SellerSprite covers 10 Amazon marketplaces with a strong reverse ASIN database that surfaces keywords your competitors rank for across US, EU, and Asian markets. It's the top choice for sellers expanding internationally who need keyword data beyond the US index.
add_circle Pros
- 10 Amazon marketplaces covered
- Strong reverse ASIN across all regions
- Product keyword spy feature is robust
remove_circle Cons
- In our testing, US keyword volume estimates diverge from Helium 10 and Jungle Scout
- Interface requires adjustment if coming from US-centric tools
- Support in English can be slow
Key Stats
DataDive
8.5/10DataDive is built around one idea: instead of exporting keywords one competitor at a time, you build a whole keyword universe from a set of ASINs and let the tool cluster it into topics. Its Share of Voice metric shows how visible each competitor is across that universe, which is how you find the pockets of demand nobody in your niche has covered yet.
It is the most specialised tool on this list. If you already run Helium 10 or Jungle Scout for product research and want a sharper keyword layer on top, this is the add-on we reach for. As a first and only tool it will leave gaps: it is a keyword instrument, not a suite.
add_circle Pros
- Best keyword universe builder we have used
- Topic clustering surfaces terms other tools miss
- Share of Voice metric across the top competitors
remove_circle Cons
- In our testing, the product database is smaller than Jungle Scout's
- Keyword-focused, so demand forecasting is limited
- Most sellers will pair it with a second tool for full research
Key Stats
MerchantWords
8.4/10MerchantWords has one of the largest historical Amazon keyword databases, with data going back years. This makes it uniquely valuable for spotting seasonal trends, validating that a keyword's current volume isn't a temporary spike, and identifying keywords that are growing vs. declining.
add_circle Pros
- Years of historical search volume data
- Good for seasonal trend validation
- Large global keyword database
remove_circle Cons
- In our testing, real-time volume data is less precise than Helium 10
- UI is dated compared to newer tools
- No listing builder integration
Key Stats
KeywordTool.io
8.2/10KeywordTool.io generates keyword suggestions from Amazon, Google, YouTube, and other platforms simultaneously, useful when you want to understand whether a product is searched for beyond Amazon and capture demand that starts on Google or social.
add_circle Pros
- Cross-platform: Amazon, Google, YouTube, more
- Good for discovering off-Amazon demand signals
- Simple clean interface
remove_circle Cons
- In our testing, Amazon-specific data depth is below Helium 10
- No search volume for free tier
- No reverse ASIN functionality
Key Stats
Keywords.am
8.3/10
Key Features
Keywords.am is a purpose-built Amazon keyword research tool that covers reverse ASIN lookups, search volume data, and keyword difficulty scoring in a clean interface. Where it differentiates from free alternatives is in combining keyword discovery with a direct listing audit, showing you which of your high-value keywords are actually indexed in your current listing vs. missing.
In our testing (May 2026), it's most valuable for sellers at the "optimize what I have" stage rather than the pure discovery phase. The keyword-to-listing gap analysis gives a clear, actionable output for improving existing listings. Pricing starts from approximately $49/mo.
add_circle Pros
- Bridges keyword research and listing audit in one tool
- Clean reverse ASIN with search volume estimates
- Listing gap analysis is actionable and export-ready
remove_circle Cons
- In our testing, keyword database depth lags Helium 10 and SellerSprite for US volume
- No PPC keyword integration
- Less historical trend data than MerchantWords
Key Stats
How to Do Amazon Keyword Research (the 5-Step Process)
A keyword tool is only as good as the process you run it through. This is the sequence we use on every listing, and it works with any of the seven tools above.
1. Seed from the buyer, not the product
Write down what a shopper would type, not what you call the product internally. "Stainless steel insulated bottle" is your spec sheet; "water bottle for hiking" is the search. Type your seed into the Amazon search bar and note every autocomplete suggestion. That list is free, live demand data straight from Amazon.
2. Reverse-ASIN your three closest competitors
Reverse ASIN lookup shows the keywords a competing product already ranks for. Pick three products that a customer would genuinely cross-shop against yours, pull their keyword sets, and look at the overlap. Terms all three rank for are the category's core; terms only one ranks for are where the gaps live.
3. Filter by relevance before volume
A 40,000-volume head term you can't win is worth less than a 900-volume phrase that converts. Cut anything describing a product you don't sell, then sort what's left by search volume. Relevance first, volume second: that order is what separates a keyword list from a keyword strategy.
4. Place them by priority
Your highest-volume relevant term belongs in the title. The next tier goes in bullets, then the description and A+ content. Anything left over, including misspellings, Spanish-language variants and long-tail phrases, goes in backend search terms, where Amazon indexes it without a shopper ever seeing it. Never repeat a keyword across fields; Amazon indexes it once either way.
5. Verify indexing, then track rank
Placing a keyword doesn't guarantee Amazon indexed it. Check indexing before you spend anything on ads against that term, then track your position weekly so you can tell an algorithm shift from a competitor outranking you. See the rank and index checker section below for how to do both.
Best Free Amazon Keyword Tools: What You Actually Get
"Free Amazon keyword tool" is one of the most searched phrases in this category, and the honest answer is that free options are real but bounded. They will get a first listing live. They will not give you the reverse-ASIN depth or search-volume history that a paid tool sells.
Here is what is genuinely available at no cost as of August 2026, and where each one stops.
Amazon's own search bar
Autocomplete is Amazon telling you what shoppers actually type, updated continuously and free forever. Type your seed term, then repeat it with each letter of the alphabet appended to harvest the long tail. No volume numbers: you get the terms, not the sizes.
Brand Analytics: Search Query Performance
If you are Brand Registered, Seller Central gives you the search terms that led to impressions, clicks and purchases on your own ASINs, along with your share of each. It is first-party Amazon data at no extra cost. The limit is scope: it only covers queries your products already appear for, so it cannot find demand you are not touching yet.
Your Search Terms report
If you run Sponsored Products, the search terms report in Campaign Manager shows the exact queries that triggered your ads and which ones converted. This is the highest-quality keyword data most sellers already own and never mine. Free with any ad spend you are already making.
Free tiers on paid tools
Helium 10 offers a limited free plan and Keywords.am has a free tier, both as of August 2026, enough to sample search volumes and run a handful of lookups per month. Treat them as a trial of the workflow rather than a permanent setup; the usage caps are what the paid plans exist to remove. Check each provider's current plan page before relying on any specific limit.
Our take: run free tools for your first one or two listings. The moment you are choosing between products to launch, or spending real money on PPC, the cost of a wrong decision exceeds the $35 to $99/mo a paid tool charges. You can compare what each paid tier actually unlocks in the comparison table above.
Amazon SEO Tools vs Keyword Tools: What's the Difference?
Sellers search for an "Amazon SEO tool" and an "Amazon keyword tool" interchangeably, but they describe two halves of the same job. A keyword tool tells you which terms to target. An Amazon SEO tool is the broader category that also covers where you place those terms, whether Amazon indexed them, and what happens to your rank afterwards.
Every tool on this page does keyword discovery. What separates them is how much of the rest of the SEO workflow they carry.
Keyword discovery
Finding the terms: seed expansion, reverse ASIN, search volume. This is the part every tool in this comparison does, and the part free options can partly cover. It is the input to Amazon SEO, not the whole of it.
Listing optimization
Getting the terms into the title, bullets and backend fields in the right priority order, without keyword-stuffing a listing into unreadability. Some suites include a listing builder or optimizer that scores your draft against your target set; others leave you to place terms by hand. If this matters to you, see our listing optimization tools comparison.
Index and rank tracking
Confirming Amazon actually associates each keyword with your ASIN, then watching position over time. This is the feedback loop that turns keyword research into Amazon SEO rather than a one-off list. It is covered in the section below.
Our take: if you are shopping for an "Amazon SEO tool", you are usually looking for a suite that spans all three stages rather than a standalone keyword finder. The comparison matrix below shows which of the seven cover rank tracking and listing support alongside keyword discovery, based on the plans we reviewed as of August 2026.
Amazon Keyword Rank & Index Checkers
Finding keywords and checking keywords are two different jobs, and sellers often buy a tool for the first while needing the second. An index checker answers "does Amazon associate this keyword with my ASIN at all?" A rank tracker answers "and what position do I hold for it?"
Checking indexing by hand
Search Amazon for your exact keyword phrase plus your ASIN in the same query. If your product comes back, you are indexed for that phrase; if nothing comes back, Amazon is not associating the two, and any ad spend against that term is pushing against a closed door. It takes ten seconds and costs nothing, so do it for your title keywords after every listing edit.
When you need a tool instead
Manual checks stop scaling somewhere around thirty keywords. A rank tracker runs the whole set daily, charts position over time, and shows you whether a drop was your listing or the whole category moving. Helium 10, Jungle Scout and SellerSprite all include keyword rank tracking in their plans as of August 2026; the differences are in tracking frequency and how many keywords each tier allows, so check the current plan limits against your keyword count before buying.
What to actually watch
Track organic rank separately from sponsored placement, or you will congratulate yourself for a position you are renting. Weekly is enough for most catalogues; daily matters during a launch or after a listing change, when you want to see the effect while you can still attribute it to the cause.
Keyword Scrapers, Extractors and Generators: What They Are
These three names get searched constantly and get used interchangeably, but they describe different things, and one of them carries risk worth understanding before you buy anything.
Keyword extractors
An extractor pulls the keywords out of a listing you point it at, usually a competitor's title, bullets and backend fields where visible. Every reverse-ASIN feature in the tools above is an extractor with a better data layer behind it: rather than reading one listing's text, it reports the terms Amazon's own index associates with that ASIN. That is the version worth paying for.
Keyword generators and suggestion tools
A generator takes one seed term and expands it into hundreds of variants: alphabet-soup autocomplete mining, plurals, modifiers, related phrases. It is a breadth instrument. The output always needs the relevance filter from step 3 above, because a generator has no idea which of its suggestions describe a product you actually sell.
Scrapers: read this part
A scraper harvests Amazon search results or listing pages in bulk by automated crawling. Amazon's Conditions of Use restrict automated data collection from its site, and standalone scraping tools operate in that grey area rather than through a sanctioned data channel. We do not recommend running one against Amazon. Every legitimate use case a scraper is sold for, whether competitor keyword sets, search result composition or ranking data, is covered by the reverse-ASIN and rank-tracking features of the licensed tools on this page, without putting your seller account near a Conditions of Use question. If you are searching for a scraper, what you almost certainly want is a reverse-ASIN lookup.
Which Tool is Your Perfect Match?
Beginner
Just want to know if you're actually profitable? Start simple.
Growing Seller
Need deep reverse ASIN data and keyword clustering?
Pro & Agency
Need the most comprehensive keyword suite with PPC integration?
The 2026 Comparison Matrix
| Tool Name | Accuracy | Complexity | Best For | Score |
|---|---|---|---|---|
 Helium 10 |
Elite | High | Full Suite Users | 9.5 |
| Jungle Scout |
High | Low | Integrated Research | 9.1 |
| SellerSprite |
High | Medium | International Sellers | 8.6 |
| DataDive |
High | Medium | Keyword Clustering | 8.5 |
| MerchantWords |
Good | Low | Historical Trends | 8.4 |
| KeywordTool.io |
Good | Low | Google + Amazon | 8.2 |
| Keywords.am | Fair | Low | Free Discovery | 8.0 |
About Maya Patel
Maya specializes in Amazon SEO and has helped over 200 sellers achieve page-one rankings through data-driven keyword strategies and listing optimization.
Frequently Asked Questions