10 Best Free Keyword Research Tools in 2021

10 Best Free Keyword Research Tools Every Marketer Should Have

Are you looking for the best free keyword research tools to help you with your SEO in 2021? Look no further. You are in the right place!

Keyword research is an essential part of search engine optimization as it helps you identify and take the opportunity of what people are searching for on the Internet.  Because of this, free keyword research tools have become a valuable part of online marketer’s toolkit.

Whether you’re finding keywords to boost or maintain your SEO ranking in 2021, the best keyword research tool will get you there.

But with so many keyword research tools out there, how do you determine the best one to choose?

As you continue reading, you will learn about free keyword research tools, their benefits and how to choose the one that’s right for you.


SEMRush - Best Online Marketing Tools in 2021

Are you trying to gain a competitive edge in your niche? If so, you must know what your competitors are doing to rank higher on search engines. SEMrush is one of the best keyword research tools in 2021 that helps you find organic keywords that your competitors rank for, alongside other great features.

What You Will Benefit from SEMrush
  • Have an overview of multiple keywords to discover profitable ones.
  • Analyze the organic ranking of your competitor’s keywords.
  • Explore a database of over 20 billion keywords.
  • Conduct keyword gap analysis to discover keyword opportunities.
  • Conduct SERP analysis of over 1,000 keywords at once.
  • Get organic traffic insights to evaluate your organic performance.


KWFinder - Best Online Marketing Tools in 2021

KWFinder is a great tool for generating a vast number of long-tail keyword opportunities with low SEO difficulty, helping you focus your time on ranking above your competition in search engines. With KWFinder, you can easily monitor your ranking on search engine result pages (SERP) and see the areas you need improvement.

What You Will Benefit from KWFinder
  • Upload and review as many keywords in one place.
  • Use the KWFinder domain lookup tool to discover your competitors’ keywords.
  • Create a list of profitable keywords for your website.
  • Track your keyword ranking to strengthen your strategies.


Ahrefs - Best Online Marketing Tools in 2021

Ahrefs is an all-in-one keyword research tool with all you need to find profitable keywords and bit your competition on search engines. Ahrefs is packed with excellent features that allow everyone to conduct keyword research effectively and hassle-free. Give this software a try, and you will never regret doing so.

What You Will Benefit from Ahref
  • Get real-time keyword suggestions from 10 different search engines.
  • Discover keyword difficulty level with ease.
  • Categorize and save your keywords into a list.
  • Get a complete picture of SERP and understand the secret behind it.

Surfer SEO

SurferSEO - Best Online Marketing Tools in 2021

One of the most critical metrics for measuring SEO performance is search engine results pages (SERP). With Surfer SEO, you can get a comprehensive SERP analysis to know the right keywords to use in your content. To help you find more profitable keywords, Surfer provides you with country-based keyword suggestions.

What You Will Benefit from Surfer SEO
  • Conduct single and multiple keyword research in one dashboard.
  • Get real-time analysis of your content with in-depth suggestions.
  • Have a complete picture of search engine results pages to identify ranking opportunities.
  • Get country-specific keyword suggestions.
  • Find related keywords with ease.

Long Tail Pro

Long-tail keywords are more popular because they have low ranking difficulty. Meaning, you can easily rank on search engine with a long-tail keyword than short or medium-tail keyword. To succeed in this, you need the Long Tail Pro tool, which is specifically designed to ease your long-tail keyword research.

What You Will Benefit from Long Tail Pro
  • Find profitable keywords that matter to your niche.
  • Get in-depth keyword suggestions that can boost your search engine ranking.
  • View your competitor keyword list to strategize your campaign.
  • Get a comprehensive analysis of search engine results pages (SERP) to find profitable keywords.
  • Easily monitor the ranking of your keywords to optimize your search engine ranking.

SEO PowerSuite

SEOPowerSuite - Best Online Marketing Tools in 2021

SEO PowerSuite is a free downloadable software consisting of four powerful tools: Rank Tracker, WebSite Auditor, Link-Assistant and SEO SpyGlass. These tools have unique features that will enable you to tackle the challenges of digital marketing. For your keyword research, the Rank Tracker Tool is all you need.

What You Will Benefit from SEO PowerSuite Rank Tracker
  • Track your website performance on search engine results pages effortlessly.
  • Discover the keywords used by your competitors to rank higher on search engines.
  • Explore profitable keywords through competitor gap analysis.
  • Get in-depth keyword suggestions you need to top search engine ranking.
  • Discover multiple ways of identifying long-tail keyword opportunities.
  • Know the keywords your pages are ranking for and how best to optimize your site.


SERP Stats - Best Online Marketing Tools in 2021

SERPStat is one of the leading free keyword research tools in 2021 that show you exactly how a keyword is doing in search engine rankings, how competitive a keyword is, and who your biggest competitors are. To get a comprehensive insight into any keyword, SERPStat is all you need.

What You Will Benefits from SERPStat
  • Conduct missing keyword analysis to improve your SEO ra.
  • Get reliable insights on search questions.
  • Find keywords that are related to any keyword.
  • Discover the keywords your competitors are using to rank high on search engines.



If you want to learn more about your competitors’ secrets, SpyFu is designed to help you achieve that. With this excellent free keyword research tool, you will discover profitable keywords and realize the keywords you’ve missed in your campaign. SpyFu also ensures that you have a full picture of a particular keyword, such as its volume, trend, competition, difficulty level, CPC, etc.

What You Will Benefits from SpyFu
  • Identify the keywords your competitors are ranking on search engines.
  • Get a complete overview of a keyword, its volume difficulty level, competition, cost per click etc.
  • Discover keywords that are related to any particular keyword.
  • Get a real-time rank analysis of any keyword.
  • See the ranking history of a particular keyword.

Bonus FREE Keyword Research Tool in 2021



Ubersuggest is also one of the best free keyword research tools in 2021. Designed by Neil Patel, this tool offers numerous suggestions on different keywords, ranging from short-tail to long-term keywords.

Ubersuggest helps you see the search volume, completion, and trend of a particular keyword with ease. It also generates a list of keywords that are working for your competitors and based on what people are searching on Google.

Which Keyword Research Tool is Right for You?

To determine which of the above best free keyword research tools is right for you, you need to know what goals you are trying to achieve. Knowing your goals will help you look for the most important features to you, helping you save time and money.

Another thing to consider when deciding which free keyword research tool to choose is the cost. As you can see, some of the above tools are free while others are not. It is important to choose a keyword research tool that you can afford, as you can always upgrade when your budget grows.

Bottom Line

The importance of keyword research cannot be overemphasized. Keyword research helps you determine what your audience wants and enables you to optimize your content to rank high on search engines.

When done the wrong way, you can waste your time and resources conducting keyword research that doesn’t add value to your business. Similarly, if you choose the wrong keyword research tool, it will waste your time and money.

Now that you’ve learned about the best free keyword research tools in 2021, it’s time to take full advantage of the tool that’s right for you.

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