The 11 Best Amazon Keyword Research Tools for Amazon Sellers (Free & Paid)

Are you struggling to get to the top of Amazon’s search results? Are your sales dropping due to a lack of product visibility on Amazon Marketplace?

These problems are a result of poor keyword research.

Choosing the best Amazon keyword research tool is crucial to maximize sales, but there are many options to choose from out there.

In this guide, I ranked and reviewed the 11+ best keyword research tools, along with my top 5 choices, so that you can pick the best one for you.


Magnet & Cerebro are probably the most popular tools on this list. If you think you will need to run 300+ searches a month, then Helium10 is for you as it will be more affordable.


Zonguru provides one of the most accurate reverse ASIN searches filtering our irrelevant keywords, plus has an excellent listing optimization interface. Their new integration with ChatGPT makes this tool a time saver.

sellerapp sellerapp

SellerApp is an all-in-solution with everything you need to increase your visibility on Amazon and boost your sales. Its interface is quite advanced, and I would recommend it for advanced users


WordTree is a keyword tool where you only pay for each report you order, making it an excellent option for sellers on a budget, or for sellers that only need a few reports per launch.

keyword tool dominator logo

Keyword Tool Dominator is a keyword tool that you can use for channels such as Amazon, Etsy, eBay, as well as Walmart, making it an perfect tool for multi-channel ecom sellers.

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Don’t worry if you can’t find what you’re looking for in the top five. Below is my detailed review of what I think are all the best Amazon keyword tools.

What Is the Best Amazon Keyword Research Tool?

As an Amazon seller, it is vital to find top keywords to rank for per product.

Here are my picks for the best tools to help Amazon FBA sellers like you find the best keywords possible.

Let’s get started.

out of 10

Omar's Take

Helium10 has always been my go to when it comes to keyword research, and we have tested it extensively as we use it for our clients.

However, it needs advanced knowledge of filters to be able to navigate the tools properly and source the right keywords.

It’s an excellent tool overall, but you will need to learn how to use its settings to be able to use its full potential.

Key Features

Helium 10, considered by many the best keyword research tool for Amazon sellers, has many powerful features.

Keyword Research

This feature lets you find thousands of high-ranking keywords that you can integrate into your listings to put you at the top of Amazon’s search results. With Helium 10’s Cerebro tool, you can uncover your competitors’ keyword strategies.

Keyword Tracker

Use this feature to track your keyword rankings (organic and sponsored) in real time. You can also view other data like trends and monthly search volume. You can also compare your rankings with your competition to determine your visibility against your competitors.


Due to Helium 10’s wide array of features, several users report that using the tool can be complicated. According to some reviews, the tool has a high learning curve. Some users also state that they experience occasional glitches when using the tool.


Helium 10 has three pricing tiers (excluding the discount that you get here)

  • Starter – $39 monthly ($348 for annual billing)
  • Platinum – $99 monthly ($1,008 for annual billing)
  • Diamond – $249 monthly ($2,508 for annual billing)
out of 10

Omar's Take

Zonguru has one of the best amazon keyword research tools in the market.

Their tool “Keyword on fire” is a high-performance Amazon keyword tool designed for accuracy.

It’s one of the most powerful keyword research tools you can get, and its affordable pricing makes it difficult to beat.

What makes is unique is its combination with the listing optimizer tool to quickly filter our irrelevant keywords and track the relevant ones in your product listing.

Moreover, they just introduced an integration with ChatGPT, making it even better.

ZonGuru is a powerful tool with excellent features.

Keyword Data

Keywords On Fire shows you a ton of keyword data to help you make the best decisions possible for your business and maximize your profits. Anytime you research a keyword, you’ll see various data points that include:

  • Search volume – Monthly search volumes for your keywords sourced directly from Amazon’s Brand Analytics API
  • PPC Bid – The average PPC bid for your searched keywords
  • Competitor Position – Shows your competitors’ ranking for a specific keyword

With such advanced data, it’s easier for you to insert the right keywords into your product listings.

Listing Optimizer Integration

ZonGuru has a separate Listing Optimizer tool, and Keywords On Fire seamlessly integrates with it. This integration makes it easy to immediately insert your searched keywords into your listings with a simple mouse click.


Keywords On Fire is a powerful Amazon Keyword Research Tool, but it’s not a versatile tool. You can’t use it to manage your business because it doesn’t have things like e-commerce integrations, inventory management, or order fulfillment. If you’re looking for an all-in-one tool, Keywords On Fire isn’t it.


ZonGuru is available in three pricing tiers.

  • Researcher – Starts at $39 monthly ($288 for annual billing)
  • Seller – Starts at $49 monthly ($456 for annual billing)
  • Enterprise – Custom pricing only
out of 10

Omar's Take

SellerApp is a feature-packed Amazon tool that helps you develop profitable keyword strategies, maximize your PPC campaigns, optimize your listings, and stay one step ahead of the competition.

Another great thing about SellerApp is that it’s affordable.

SellerApp has plenty of features to help Amazon sellers.

Key Features

Keyword Search

When you do a keyword search on SellerApp, the tool skims through tons and tons of keyword data to give you the most relevant and profitable search terms for your business. SellerApp’s database contains more than 135 million keywords, so you can be sure that you’ll always find better keywords for your listings.

Amazon Listing Optimization

This feature allows you to analyze your visibility in organic search results. You’ll be able to see the organic search rank of your product keywords. SellerApp also has a score of 1 to 100 to show you how visible your product listings are. A score of 80 to 85 is good, but there’s still room for improvement.

To help you improve, SellerApp provides detailed recommendations for each metric that isn’t up to Amazon’s A9 algorithm standards.


SellerApp has a free version, but it severely lacks features. You can’t export reports, you can only track two products, data retention only lasts 60 days, and you don’t have access to customer support.


SellerApp has three pricing tiers.

  • Freemium – $0 (No credit card required)
  • Pro Lite – $49 monthly ($468 for annual billing)
  • Professional – $99 monthly ($948 for annual billing)
out of 10

Omar's Take

WordTree is a highly affordable tool designed to help you increase traffic to your Amazon page, monitor your competition, and optimize your listings.

The good thing about WordTree is that you don’t have to pay a monthly or yearly fee. You only pay for each report, and each report only costs $20. As a bonus, new users get their first reports for only $10. If you’re a seller on a tight budget, WordTree might be the tool for you.

Key Features

WordTree has features designed specifically to help Amazon sellers.

Reverse ASIN Lookup

This feature allows you to research your competitors’ products and determine how you stack up against them. The best part is that reports have a flat rate of $20, whether you have one competitor or ten competitors on the report. According to WordTree, their Reverse ASIN Lookup tool is 2.8 times more accurate than those of their competitors.

Listing Optimization

This feature helps build effective listings that incorporate all the keywords necessary to increase your visibility. WordTree’s tool is also optimized for Amazon’s A9 algorithm, so you can be sure that you get accurate information each time.


WordTree is not the most versatile tool. It has features for keyword research and PPC management—but that’s about it. You’ll have to look elsewhere if you need other features to help you better manage your business.


WordTree doesn’t have a monthly or yearly fee. You only pay for each report that you get. The price is $20 for each report, but bulk pricing is available upon request.

out of 10

Omar's Take

Keyword Tool Dominator is a tool that you can use on multiple sales channels including Amazon, eBay, and Etsy. What makes Keyword Tool Dominator different from most tools is its pricing structure. 

When you sign up for Keyword Tool Dominator, you pay for each channel-specific tool that you want to use. You also pay a one-time fee for each tool instead of a monthly or annual subscription. 

For example, if you need the Amazon tool, you pay a lifetime fee of $49. If you need tools for other channels, you’ll have to pay separate fees. However, Keyword Tool Dominators offers discounts for bundles.

Keyword Tool Dominator has features designed for a variety of sales channels, including Amazon.

Key Features

Fast Keyword Research

This feature allows you to save hours of effort in doing keyword research. You can find thousands of the best keywords in just a few clicks. You can use the time you save on keyword research to do other tasks.

Popularity Score and Top 10

This feature allows you to find the most searched keywords on Amazon. You’ll see keyword scores ranging from 0 to 100, with 0 being the least popular and 100 being the most popular. You can include the top 10 keywords in your Amazon listing to generate more traffic and increase your visibility.


Keyword Tool Dominator is affordable in the sense that you only pay a $49 lifetime fee for each channel-specific tool that you want. However, if you sell on multiple sales channels, you’ll have to pay for each tool separately. 

Keyword Tool Dominator has an ecommerce bundle where you pay an $89 lifetime fee for 6 channel-specific tools, but I feel like it’s just going to be a waste for many sellers. 

The e-commerce bundle has tools for Amazon, eBay, Etsy, Google Shopping, Home Depot, and Walmart. It’s doubtful that a seller is doing business on all six of those platforms. At most, they sell on two or three platforms, meaning the other tools just go to waste.


Keyword Tool Dominator has a lifetime price for each channel-specific tool and discounted bundles.

Keyword tools:

  • Amazon – $49 (lifetime price)
  • Bing – $49 (lifetime price)
  • eBay – $49 (lifetime price)
  • Etsy – $49 (lifetime price)
  • Google – $49 (lifetime price)
  • Google Shopping – $49 (lifetime price)
  • Home Depot – $49 (lifetime price)
  • Walmart – $49 (lifetime price)
  • Youtube – $49 (lifetime price)


  • E-commerce Bundle (6 tools) – $89 (lifetime price)
  • Keyword Tool Suite (all tools) – $149 (lifetime price)
out of 10

Omar's Take

Jungle Scout is a relatively inexpensive Amazon tool that helps you find high-converting keywords and save money on your PPC campaigns.

It’s an excellent tool for Amazon keyword optimization, and its affordable price point makes it an excellent option for small and medium-sized sellers. 

  • Best For Small & Medium-Sized Sellers
  • Price Starts at $49/mo
  • Annual Discount YES
  • Promotion Risk-free Money Back Guarantee

Jungle Scout has tons of fantastic features.

Key Features

Keyword Scout

This tool helps you with your keyword search to find the highest-converting and most profitable keywords for your listings. Keyword Scout makes it easy to generate keywords You can also view the monthly search volume of Amazon keywords and analyze the historical performance of any given keyword for up to two years.

Save on Amazon PPC Campaigns

You can see the cost-per-click of keywords to help you save money on competitive keywords with high search volumes. This feature makes it easy to find inexpensive keywords with a high ranking potential. Once you find those keywords, you can target them with low-cost PPC campaigns.


Jungle Scout has many features, but this can work against it. Due to its many features, some users may find the Jungle Scout interface too cluttered and difficult to navigate. Some reviews also point out that Jungle Scout has a steep learning curve.


Jungle Scout has three pricing tiers.

  • Basic $49 monthly ($349 for annual billing)
  • Suite  $69 monthly ($589 for annual billing)
  • Professional $129 monthly ($999 for annual billing)
out of 10

Omar's Take

Sonar is a free Amazon keyword tool from Sellics. Sonar helps Amazon sellers like you find relevant keywords to improve your Amazon SEO, increase the visibility of your listings, and boost your profitability.

Sonar’s database has more than 180 million keywords, so you’ll always find the best and most relevant keywords to integrate into your listings. These keywords come from actual Amazon shoppers from different countries, such as the US, UK, Spain, France, and Italy.

  • Best For Sellers Looking for a Free Solution
  • Price Free
  • Annual Discount N/A
  • Promotion It's Free!

Even though Sonar is free, it has several useful features.

Key Features

Reverse ASIN Lookup

This feature is an Amazon keyword tracker that enables you to perform reverse ASIN searches to track your competitor’s keywords. Just enter the Amazon Standard Identification Number (ASIN) of a competitor’s product, and Sonar provides you with a list of the keywords the product is ranking for.

Reverse ASIN Lookup eliminates the guesswork that comes with keyword research. You can look up the ASINs of a competitor’s products to see the keywords that rank for similar products.

Real-life Search Volume

Sellics has developed a predictive algorithm for Sonar that calculates the likelihood of keywords appearing along with other essential search parameters. This feature lets you see the real-life Amazon keyword search volume for search queries on Sonar.


Sonar is free, which means it has a limited feature set. It’s a tool for Amazon keyword research and reverse ASIN lookup, but that’s about it. You’ll need to look elsewhere if you want a comprehensive Amazon SEO tool.


It’s completely free. So it’s probably the best free amazon keyword research tool if you want basic features. You don’t even have to create an account to use it.

out of 10

Omar's Take

Stylized as MerchantWords, this tool has all you need to succeed as an Amazon seller. The tool offers keyword research and reverse ASIN searches.

MerchantWords also provides services geared toward large and enterprise-level sellers, such as brand audits and API plans

  • Best For Enterprise Sellers Looking For Versatility
  • Price Starts at $35/mo
  • Annual Discount Yes
  • Promotion N/A

MerchantWords has many valuable features.

Key Features

Keyword Explorer

Use this feature to simplify your keyword research. You can analyze keywords while you search. You can also see the top seed keyword or keywords and relevant longtail keywords. When you’re done with your keyword research, you can save and download all the keywords you want to use.

Keyword Multiplier

This feature allows you to find related keywords, which are search terms tied to your primary keywords. Related keywords are usually synonyms of your primary keywords. Finding related keywords helps you determine customers’ different search terms to find similar products.


Although MerchantWords has a Basic Plan worth $35 a month, that plan has limited functionality. You can only see Amazon data from one country, and you can only store and track ten keywords. To maximize MerchantWords, you’d need to get either the Platinum or Enterprise Plan. As such, I think MerchantWords is only ideal for enterprise-level sellers


MerchantWords has four pricing tiers:

  • Basic – $35 monthly ($350 for annual billing)
  • Gold – $79 monthly ($790 for annual billing)
  • Platinum – $149 monthly ($1,490 for annual billing)
  • Enterprise – $749 monthly (no annual billing option)
out of 10

Omar's Take

Scientific Seller’s free tool is great if you only want to do a few daily searches. The free version only allows you five searches a day, and you can’t export the data, but it’s free forever, so it’s both good and bad.

  • Best For Someone Looking for Non-common Alternatives
  • Price Starts at $29.99/mo
  • Annual Discount N/A
  • Promotion Basic Account Free Forever

Scientific Seller has Amazon-focused features.

Accurate Results

According to Scientific Seller, they always provide accurate keyword search results and update their database regularly.

The tool searches through Amazon in real-time and always has the latest keywords.

Amazon Buyer Keywords

According to the website, Scientific Seller only shows keywords from Amazon buyers. The tool collects data from sources such as Latent Semantic Indexing (LSI), and the tool removes any keyword that isn’t an actual Amazon keyword.


Scientific Seller’s Basic account is free forever but offers almost nothing valuable. 

You can only search five times a day and can’t export the data. Unlike other free tools, Scientific Seller shows you all the results. 

The free account is only ideal for beginners in keyword research. You can use the Basic account to learn the ropes and open your eyes to the world of keyword research. Once you have more experience, I suggest you find other tools.

The website says that Scientific Seller’s keyword search speed is up to three times faster than others, but according to some reviews, Scientific Seller is slow.

The developers know about Scientific Seller’s slow search speed, but they have a reason behind it. The website says the search speed is slow because the tool takes time to provide the user with the most accurate keywords possible.

Scientific Seller’s philosophy is “Slow and steady wins the race.” Some sellers may find this appealing, but most will likely want a tool that provides instant results. Your choice to use this tool will likely depend on whether you want results fast or slow but accurate (According to Scientific Seller).


Scientific Seller has three pricing tiers.

  • Basic – Free
  • Seller – $29.99
  • Power Seller – $49.99
out of 10

Omar's Take

More than 6,000 companies around the world use Ahrefs (including mine), and it’s easy to see why. Ahrefs has been a trusted name in SEO for many years because they deliver reliable and accurate results.

Ahrefs currently has a database of 19.2 billion keywords in 243 countries. This database is the biggest in the world, and it’s still growing. Ahrefs is likely the most comprehensive keyword tool you’ll find. Just remember that Ahrefs isn’t designed specifically for Amazon, so its extensive array of features may overwhelm you.

  • Best For Someone Looking at Google Optimization
  • Price Starts at $99.00/mo
  • Annual Discount Yes
  • Promotion N/A

Ahrefs is an all-in-one SEO and keyword research solution with many features.

Amazon Keyword Tool

Use this feature to determine how people search for your products on Amazon. Just type a general description of your product into the Amazon Keyword Tool and check one of the five reports on keyword ideas to see the most popular related search terms.

Ahrefs’ Amazon Keyword Tool can help you find the best keywords for your Amazon listings. Ahrefs’ US Amazon database has approximately 100 million keywords, so make sure you use Ahrefs’ built-in filters to refine your search. Use any relevant keywords on your listings to increase your product visibility to potential customers.

Advanced SEO Metrics

Ahrefs’ data analytics provides advanced keyword metrics, such as:

  • Clicks – The average number of clicks people make each month when searching for specific keywords
  • Clicked/Not Clicked – The percentage of searches that resulted in at least one click on Amazon’s search results
  • Clicks Per Search – The average number of clicks on a product listing per search

Ahrefs provides accurate and reliable data by analyzing the browsing habits of actual Amazon users. According to Ahrefs, their tool is the only one that provides such in-depth analytics.


Ahrefs’ Amazon Keyword Tool is free but only shows you the first 100 results. Ahrefs has no free version, and the company doesn’t offer free trials. To maximize Ahref’s Amazon Keyword Tool, you’ll have to subscribe to at least the Lite plan. 

Ahrefs is one of the most comprehensive SEO and keyword tools, but its long list of features may be a turn-off for some sellers. Remember that Ahrefs is also not designed specifically for Amazon, so it may not be the most effective Amazon keyword research available.


Ahrefs is available in the following pricing tiers: 

  • Lite – $99 monthly ($990 for annual billing)
  • Standard – $199 monthly ($1,990 for annual billing)
  • Advanced – $399 monthly ($3,990 for annual billing)
  • Enterprise – $999 monthly ($9,990 for annual billing)


Why do I need an Amazon keyword tool?

Amazon’s search engine acts like other search engines on the Internet. Similar to Google or Bing, Amazon indexes content to instantly deliver the most relevant search results to people. Amazon achieves this by using a proprietary algorithm—the A9 Algorithm.

The difference between Amazon and a search engine like Google is that Amazon is a marketplace that wants people to buy the products listed on the market. To help sellers, Amazon uses the keywords in your listings to identify your products and those who may be interested in buying them.

As a seller, using the right keywords can lead to improved product visibility, competitive advantages, and increased conversions.

The thing is, you can’t find the right keywords by guessing. 

To find the best keywords for your listings, you need an Amazon keyword research tool. With a keyword tool, you can easily do a keyword search to find keywords with a high search volume and integrate them into your listings.

Amazon keyword tools can also help you with more than just keyword research. They can also help you do things like view search volume data, optimize your PPC campaigns, and analyze your competitors’ keywords.

What is the A9 Algorithm?

The A9 algorithm is the system that allows Amazon to decide how products are ranked in their search results. Like Google’s algorithm, the A9 algorithm uses keywords to determine the most relevant results for a search and displays those results first. However, unlike Google’s algorithm, the A9 algorithm prioritizes sales conversions. 

Amazon wants people to buy from the marketplace, so it prioritizes keywords that are more likely to result in conversions. Amazon will rank listings with high conversions at the top of search results and display those listings first.

Can I use Google Keyword Planner for Amazon keyword research?

Google’s Keyword Planner is a simple tool that is immensely popular among SEO professionals. It’s the go-to option for many who want to improve their SEO. It’s also free, which means anyone can use it.

You can use Google Keyword Planner to do keyword research for Amazon if you don’t have any alternatives. However, keep in mind that this tool isn’t designed for Amazon. It uses Google’s algorithm, not the A9 algorithm, so it may not provide you with the best possible keywords for Amazon.

The Bottom Line

There are free and paid keyword rank tools for Amazon available, and both options have advantages and disadvantages. Don’t choose a free tool just because you want to avoid paying a fee. It may not be able to provide you with what you need.

Conversely, avoid thinking a paid tool is high-quality because it’s expensive. While a paid tool may have many features, they go to waste if you don’t end up using them.

Hopefully, reading this article has helped you decide on the best amazon keyword research tool for your business. If you prefer someone to help you with your product listing, you can always message us, and we can see if we can work together. Our agency OJ Digital Solutions, has been selected among the Top Amazon Marketing Agencies by DesignRush.

Visit our blog to learn more about maximizing your presence on Amazon..

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Omar Deryan
Founder of OJ Digital Solutions

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