8 Top Best Keyword Research Tools for SEO in 2021

8 Top Best Keyword Research Tools for SEO in 2021
8 Top Best Keyword Research Tools for SEO in 2021

In this article,we’ve come up with the 8 Top best keyword research tools for SEO in 2021 that will up your SEO game quickly.

Why? It’s because keyword research is the most integral part of SEO, without a doubt.

Whether you want to start a blog from scratch or revamping your content plan, finding quality keywords leads to increased ROI. There are tons of tools to help you with that.

This article is a result of my experience in the world of digital marketing. I’ve used all these tools and found them amazing for doing content research. Every tool is unique and thus geared towards a particular need. But some may be perfect for almost every scenario.

So, let’s get started with top keyword research sites without further ado.

8 Top Best Keyword Research Tools for SEO in 2021

Some of these keyword research apps are free, and some aren’t. All of them are awesome to up your rankings regardless of the pricing. Let’s start with a keyword tool from the biggest search engine, Google.

Google Keyword Planner

Do you want to hone the power of Google’s huge keyword database? The Keyword Planner has tons of opportunities for you. The number one reason to choose this tool is that it comes straight from Google.

Google Keyword Planner

No SEO tool in the world is accurate, but Google Keyword Planner is trustworthy for its data. Choose the right keywords to attract the right visitors to your blog or site. The tool lets you know extremely valuable information like:

  • Keywords by relevance
  • Average monthly searches
  • Overall competition
  • Low to high top of page bid

The thing I like about the Keyword Planner is that it offers simple to pro-level data. For example, you aren’t limited to a single keyword only.

You can use up to 10 long phrases as well. And creating keyword suggestions from a website is also seamless with Keyword Planner. And it’s absolutely free forever. Isn’t it awesome?

SEMRush Keyword Research Tool

If you want everything about content research under one roof, SEMRush can be an extremely valuable tool for you. It helps you analyze a domain, research keywords, and steal them from your competitors.

SEMRush Keyword Research Tool

But wait, there’s more. You can also identify link-building opportunities and tweak technical SEO using the tool. As for the keyword research specifically, SEMRush helps you determine:

  • How many people are searching for a keyword
  • Who’s ranking for that keyword
  • And what are related keyword opportunities for you

I love the way SEMRush offers ‘Keyword Overview.’ The section lets you know keyword difficulty, search volume, trends, CPC, and more. It also provides the overall trend for your keyword and keyword variations.

The pricing for SEMRush starts from $119.95 per month. But it comes with a lot more features than just keyword research. For example, you can identify overuse of keywords, duplicate and slow-loading content. You’ll surely up your SEO game if you learn how to use the tool properly.

Ahrefs Keywords Explorer

Ahrefs is my go-to tool to do everything from keyword research to website analysis. It offers the most keywords than any other tool in the world. And the tool has reliable data from its search volume to backlinks to social shares.

Ahrefs Keyword Explorer

Let’s talk about a keyword tool by Ahrefs called the Keyword Explorer. It offers tons of value to up your SEO game without a doubt. First off, it doesn’t limit you to exploring Google only. But you can also dig deep into YouTube, Amazon, Bing, Yahoo, Yandex, and more.

The keyword research with Ahrefs is highly detailed. You can have an idea of keyword difficulty, search volume, CTR, CPS, and paid clicks. The tool also lets you know the search volume and the percentage from other countries as well.

The pricing starts from $99 and goes on to $999 per month, depending on your overall usage. But the money is absolutely worth it because Ahrefs generate more keyword suggestions than any other tool in the world. Try Ahrefs’ Keyword Generator for free to taste the tool before you go for the premium version.


Do you want to create tons of blog post ideas in advance? AnswerThePublic must be your go-to tool for that. The best thing about AnswerThePublic is that it comes up with the most valuable content ideas from a human perspective.

Answerthepublic - Content Research Tool

AnswerThePublic is a visual keyword research tool to help you get content ideas in a categorized cloud.

For example, you have questions for a particular keyword. And you also get to have the type of question from what, when, and who to where, why, and how.

The main categories of keywords and content ideas are:

  • Questions (why, when, where, and more)
  • Prepositions (is, for, with, to, and more)
  • Comparisons (and, vs, or, and more)
  • Alphabetical (keywords from a to z)
  • Related (keywords)

Isn’t it awesome? And you can also download the CSV file to use all the keyword suggestions and content ideas later.

My review for AnswerThePublic is an extremely handy tool to understand the human psyche for a particular keyword.

AnswerThePublic Content Research Tool

But it’s not an advanced keyword research tool and doesn’t show search volume, keyword difficulty, or CPC. AnswerThePublic is free for 3 attempts, and then you need to pay $99 per month or $79 per month for paying upfront for an entire year.


KeywordChef is comparatively a new entrant to the market but has proven to be more promising in certain areas. I’ve enlisted it here because it’s an extremely simple yet valuable keyword discovery tool for publishers.

KeywordChef - Time Saving Keyword Discovery Tool

Honestly, KeywordChef doesn’t have as many keyword suggestions as Ahrefs. But it uses over 700 factors to find hidden keywords. The result is ‘valuable keywords with clear search intent.’ KeywordChef removes all the keywords that aren’t a perfect fit for your keyword.

With ‘Smart Wildcard Search,’ you can explore the smartest keywords in no time. KeywordChef also helps you find keywords with user-created content. I recommend using the tool, especially if you’re just starting because it enables you to tap into the low competition keywords.

Moz Keyword Explorer

Moz Keyword Explorer is one of the top keyword research tools in the world. And that’s because of its commendable feature to help you up to your SEO campaigns seamlessly. The tool helps you analyze keywords by search volume, lists, and questions.

Moz Keyword Explorer

The metrics like keyword difficulty, volume, CTR, and more let you predict your SEO wins. The tool also helps you review SERP details by keywords. What I like the most are Moz’s keyword difficulty and domain authority. These two features by Moz are specifically trustworthy without a doubt.

Cutting a long story short, Moz’s Keyword Explorer helps you do the complex analysis in minutes. The pricing for the Moz Pro starts from $99 to $599 per month, depending on your work scope. With this pricing, you get tons of other valuable tools as well.


Do you want to find long-tail keywords with low ranking difficulty? KWFinder by Mangools helps you achieve this goal. It’s one of the best long-tail keyword research tools in the world, without a doubt. Don’t believe me? Try KWFinder for free here.

KWFinder Longtail Keyword Research Tool

You can research long tails by keyword and domain as well. It means you can extract all the keywords for a particular website or a seed keyword. And you get to know all the important details about keywords, including:

  • Search
  • Keyword difficulty
  • Cost Per Click (CPC)
  • Domain/Page Authority
  • CF, TF, Links, FB, LPS, and more

Finding easy-to-rank keywords at KWFinder is easy-peasy. You can get all the above information along with relevant historical data. And the user interface is surprisingly straightforward. It means you can hone its full power even if you’re a beginner.

Neil Patel’s Ubersuggest

Ubersuggest created by Neil Patel isn’t a laughing stock anymore. It has become strong enough to up your SEO game in a few weeks. Ubersuggest suggests brilliant keywords and does smart competitor’s analysis without a doubt.

Ubersuggest Keyword Research Tool

The ‘Keyword Overview’ in Ubersuggest lets you know all the important metrics for the keyword. They include search volume, organic and paid difficulty, CPC, and more. Not only that, but the tool also helps you decide on the historical keyword data.

The Keyword Ideas’ is my favorite section in Ubersuggest because it lets you know all the related keywords. Doing the SERPs analysis is also hassle-free. As for pricing, it starts from $12 to $40 per month. But don’t worry, 3 searches per day are free forever.

By the way, Ubersuggest offers a lifetime subscription as well, which starts from $120 to $400. Getting organic traffic fast is every blogger’s goal for life. Why not try the lifetime deal, then!


Keyword research is the most determining factor for your SEO success, without a doubt. That’s why the tool you use to research keywords for your blog or site is also important. And sometimes, you need more than one tool.

Do you want to benefit from Google‘s database? Go for the Keyword Planner. Wanna go pro? Opt for Ahrefs or SEMRush. Looking to save your time? Choose KeywordChef.

I hope you like my top picks for the keyword research tools to outperform in your content game. Which one do you like the most? Let me know in the comment below and please don’t forget to share this article on all your social media handles. Thanks.

See you soon!

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