Top 10 Keyword Extraction API

Top 10 Keyword Extraction API

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In this article, we are going to see how we can easily integrate a Keyword Extraction engine in your project and how to choose and access the right engine according to your data.


Keyword extraction (also known as keyword detection or keyword analysis) is a text analysis technique that automatically extracts the most used and most important words and expressions from a text. It helps summarize the content of texts and recognize the main topics discussed. Keyword extraction uses machine learning artificial intelligence (AI) with natural language processing (NLP) to break down human language so that it can be understood and analyzed by machines.


In 1999, Turney hypothesized that keywords facilitate a user's reading by allowing him to surf from one key point to another when they highlighted in a text. Other researchers use their synthetic virtues in automatic summary construction methods, but keyword extraction is becoming increasingly useful with the rise of the Internet.

In the 2010s, many researchers are interested in automatic keyword extraction and some evaluation campaigns, such as DEFT and SemEval, propose automatic keyword extraction tasks in order to compare the different existing systems. For this purpose, the data and the evaluation method are the same for all systems. Supervised and unsupervised methods are emerging, and are nowadays combined to train keyword extraction engines.

Top 10 Speech-to-Text API:

Microsoft Azure - Available on Eden AI

Microsoft Azure text analytics API

The Text Analytics API is a cloud-based service that provides advanced natural language processing over raw text, and includes four main functions: sentiment analysis, key phrase extraction, named entity recognition, and language detection.

Available on Eden AI


ParallelDots' Komprehend AI APIs

ParallelDots provides Komprehend AI APIs that are a comprehensive set of document classification and NLP APIs for software developers. Their NLP models are trained on more than a billion documents and provide state-of-the-art accuracy on most common NLP use-cases such as named entity recognition, sentiment analysis and emotion detection.

Yonder Labs

Yonder Labs' deep analysis API platform

Yonder Labs is a data science company with a special expertise in  Natural Language Processing, Machine Learning, and Multimedia Analysis. Yonder is currently releasing new API for extracting semantic information both from single text documents, such as sentiment analysis,  entity extraction, semantic tagging, etc. and from collections of  texts, allowing for services such as text comparison, clustering, and  data mining on text collections.


TextRazor text analysis infrastructure

TextRazor offers a complete cloud or self-hosted text analysis infrastructure. They combine state-of-the-art natural language processing techniques with a comprehensive knowledgebase of real-life facts to help rapidly extract the value from your documents, tweets or web pages. They provide features such as entity extraction, disambiguation and linking, keyphrase extraction, automatic topic tagging and classification.

AWS - Available on Eden AI

Amazon Comprehend's Natural Language Processing (NLP)

Amazon Comprehend uses natural language processing (NLP) to extract insights about the content of documents. Amazon Comprehend processes any text file in UTF-8 format, and semi-structured documents, like PDF and Word documents. It develops insights by recognizing the entities, key phrases, language, sentiments, and other common elements in a document.

Available on Eden AI's Natural Language Understanding (NLU) solutions provides natural language understanding (NLU) solutions that enable large enterprises to automate the extraction, monitoring, and analysis of key information from any kind of text data. offers AI-based natural language understanding solutions built on technology inspired by Neuroscience.

IBM  - Available on Eden AI

IBM Natural Language Understanding platform

IBM Natural Language Understanding is a collection of APIs that offer text analysis through natural language processing. This set of APIs can analyze text to help you understand its concepts, entities, keywords, sentiment, and more. Additionally, you can create a custom model for some APIs to get specific results that are tailored to your domain.

Available on Eden AI        


MonkeyLearn's Text Analysis platform

MonkeyLearn is a Text Analysis platform with Machine Learning to automate business workflows and save hours of manual data processing. They provide pre-built NLP APIs adapted to use cases such as entity extraction, sentiment analysis, text classification, etc. With MonkeyLearn you can also train custom machine learning models to get topic, sentiment, intent, keywords and more.


Twinword Natural Language processing platform

As natural language processing company, Twinword provides unique experience for your keyword research process. Combining data science and SEO solutions, Twinword Ideas strives to deliver quality multi-language keyword results for any businesses on web. Twinword  Topic Tagging API does more than just extract keywords from the given text, it also generates human-like topics even without the presence of that  particular word in the context.


Cloudmersive Natural Language Processing APIs

Cloudmersive brings its customers a complete portfolio of APIs across document conversion and processing, deep learning OCR, image recognition, NLP, etc. Cloudmersive powerful natural language processing APIs perform analytics over unstructured text to identify sentiment, key words and phrases, and much more.

spaCy (Bonus - Open Source)

spaCy's Natural Language Processing platform

spaCy is an open-source software library for advanced natural language processing, written in the programming languages Python and Cython. spaCy comes with pretrained pipelines and currently supports tokenization and training for 60+ languages. It features state-of-the-art speed and neural network models for tagging, parsing, named entity recognition, text classification and more, multi-task learning with pre-trained transformers like BERT, as well as a production-ready training system and easy model packaging, deployment and workflow management. spaCy is commercial open-source software, released under the MIT license.

Use cases:

You can use Keyword extraction in numerous fields, here are some examples of common use cases:

  • Online shop: extract keywords from users feedbacks on products to find out which topics have the highest relevance
  • Customer support: keywords extraction helps analyzing customer feedback faster
  • Healthcare: using keywords extraction to facilitate medical reports understanding

The Multi cloud approach

When you need a Keyword Extraction engine, you have 2 options:

  • First option: multiple open source Keyword Extraction engines exist, they are free to use. Some of them can be performant but it can be complex to set up and use. Using an open source AI library requires data science expertise. Moreover, you will need to set up a server internally to run open source engines.
  • Second option: you can use engines from your cloud provider. Actually, cloud providers like Google Cloud, AWS, Microsoft Azure, Alibaba Cloud or IBM Watson are all providing multiple AI engines often including Keyword Extraction. This option looks very easy because you can stay in a known environment where you might have abilities in your company and the engine is ready-to-use.

The only way you have to select the right provider is to benchmark different providers’ engines with your data and choose the best OR combine different providers’ engines results. You can also compare prices if the price is one of your priorities, as well as you can do for rapidity.

This method is the best in terms of performance and optimization but it presents many inconveniences:

  • you may not know every performant providers on the market
  • you need to subscribe and contract with all providers
  • you need to master each providers API documentation
  • you need to check their pricings
  • You need to process data in each engine to realize the benchmark

Here is where Eden AI becomes very useful. You just have to subscribe and create an Eden AI account, and you have access to many providers engines for many technologies including Keyword Extraction. The platform allows you to benchmark and visualize results from different engines, and also allows you to have centralized cost for the use of different providers.

Eden AI provides the same easy to use API with the same documentation for every technology. You can use the Eden AI API to call Keyword Extraction engines with a provider as a simple parameter. With only a few lines, you can set up your project in production.

Test and API:

Here is the code in Python (GitHub repo) that allows to test Eden AI for keyword extraction:

Python's code
Eden AI Python SDK: Keyword Extraction

Part of Answer:

Code answer


Eden AI keyword extraction platform
Eden AI platform - Keyword Extraction

Eden AI keyword extraction platform
Eden AI platform - Keyword Extraction


There are numerous Keyword Extraction engines available on the market: it’s impossible to know all of them, to know those who provide good performance. The best way you have to integrate Keyword Extraction technology is the multi-cloud approach that guarantees you to reach the best performance and prices depending on your data and project. This approach seems to be complex but we simplify this for you with Eden AI which centralizes best providers APIs.

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