The 6 Best Keyword Extraction Tools & How to Use Them

Keyword extraction uses machine learning and artificial intelligence to automatically “read” texts (news articles, social media, emails, online chats, etc.) and extract pre-defined or relevant words. 

This technology helps businesses automatically comb through product reviews, customer service tickets, and surveys, among other data, to understand important keywords and extract key information (like names, emails, values).

You can paste text into a pre-built extractor model, connect extractor APIs to your  websites and apps, or create extractors from scratch using open-source libraries. 

While you can infinitely customize open-source tools, you’ll need a sizeable computer science background to build your own extractor. The easiest and most efficient way to start using keyword extraction is often with SaaS tools that you can simply plug in and start using right away. 

Below is an example of a a ready-to-use keyword extractor that we used to review the app Houseparty:

You can see, first of all, that this is a positive review, with the writer’s favorite qualities highlighted. And, second, that the writer compares Houseparty to FaceTime and other “video call apps.”

Finally, this extractor model required no setup and no code – and delivered valuable insights in seconds. Read on to learn about some of the best online keyword extraction tools.

Keyword Extraction Tools

Each technique has its own pros and cons, so it’s worth learning more about each to help make your decision. Many even offer free trials and models, so you can plug in your data and see how it works.


Best for: SaaS, software, and e-commerce companies who want to analyze customer data for immediate insight.

MonkeyLearn is an easy-to-use SaaS platform that allows you to begin keyword extraction on any source, right away. You can customize your own or use pre-trained models

Advanced natural language processing (NLP) technology provides deep machine learning to analyze text just as a human would, saving your company hundreds of employee hours. MonkeyLearn software can be integrated with applications you already use, like Google Sheets, Excel, Zendesk, Zapier, and more.

APIs are offered in every major programming language to connect MonkeyLearn’s models to the tools and apps you already use. By entering a few simple lines of code, you can extract virtually any text you need.

Pricing: MonkeyLearn offers a free plan with 300 queries/month. Paid plans start at $299 a month.

IBM Watson

Best for: Big companies with internal engineering abilities that want to extract keywords from text and speech-to-text from huge amounts of data. 

IBM Watson offers a number of tools for text analysis built to scale across industries. With their Natural Language Classifier you can build simple extraction models by uploading CSV files. Their cloud technology offers easy implementation with existing applications, though advanced integration will require coding expertise.

IBM Watson’s Speech-to-Text automatically turns audio to text, in real time, and is ideal for companies with large call centers and recorded audio feedback.

Pricing: Includes a free plan. Premium plans depend on use. 

Amazon Comprehend

Best for: Companies that want managed software, with no building requirements.

Amazon Comprehend is fully managed software, working on Amazon Web Services’ cloud, so there is no internal installation required. Their pre-trained APIs integrate directly into your existing systems, or they can build custom extractors for specific needs. 

Amazon Comprehend’s machine learning programs scour text for relationships that human users may be unable to find. Comprehend AutoML can be used to build custom models and extractors, although no coding is required.

Amazon Comprehend Medical is a favorite among medical professionals to identify and find relationships within medical information, like conditions, medications, and dosages. Put to use on exams, trials, and health records, Comprehend Medical can improve diagnoses and save lives.

Pricing: Amazon Comprehend is a pay-for-what-you-use platform. Contact for details.


Best for: Companies that want easy set-up of fixed APIs.

AYLIEN offers three API plug-ins with easy set-up in seven major programming languages.

AYLIEN’s News API allows you to real-time search and analyze thousands of daily news sources from around the world. Their Text Analysis API is a premade keyword extraction program for analyzing text data from documents and online content. And finally, their Text Analysis Platform enables you to build your own text analysis extractor (right in your browser) for ultra-targeted results.

Pricing: Aylien offers a 14-day free trial, with paid plans starting at $199 a month.

Best for: Companies that want quick implementation and low-level supervision. uses a neuroscience-based method to search, extract, and analyze keywords from nearly any unstructured text. Their models can be trained quickly with vocabulary specific to your field, without the need for human supervision.

Their software creates a “semantic fingerprint” to represent the meaning of a text as a whole. Semantic fingerprints visualize your data, showing keyword clusters and how they relate to each other. offers a pre-packaged Message Intelligence software/hardware combo for customer service and related messaging analysis. Contract Intelligence is generally for statistical and business insight evaluation, and Custom Solutions provides AI that’s tailor-made to your requirements.

Pricing: Based on use. Contact for details.


Best for: Businesses that need a number of customization tools, like multiple models trained for various specialized searches.

TextRazor can be integrated in the cloud, or self-hosted for added security. Their keyword extraction techniques work in 12 languages, with extraction built to show word relations, typed word dependencies, and synonyms. 

TextRazor’s machine learning is built with advanced semantic parsing and understands context, to read text as a human would. Use custom, domain-specific logic and build custom classification rules for advanced analytics. APIs can be integrated in minutes with just a few lines of code.

Pricing: TextRazor offers limited free plans, with paid plans beginning at $200 a month.

What Keyword Extraction Software Works for Your Business?

When you need rapid, automated keyword extraction, what tools work best for your business? Trying a free demo is a great option to see how the technology works. Keyword extraction can help your business increase productivity, improve customer service, and help you stay in touch with your customer base. 

Once you’ve uncovered keywords, your data can be coupled with other text analysis tools that help you classify texts by sentiment, topic, language, and more.

There are a number of online extraction tools you can use to take advantage of this groundbreaking technology.

Want to give keyword extraction a try for free? Sign up now to MonkeyLearn and get started in just a few minutes – no coding required.

Rachel Wolff

Rachel Wolff

BA in journalism and French from Sheffield University. Interested in human-machine collaboration and Google's ever-changing algorithms.


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