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NLP APIs

Top 7 NLP (Natural Language Processing) APIs [Updated for 2021]

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What is NLP (Natural Language Processing)?

Natural language processing (NLP) is an area of computer science and artificial intelligence concerned with the interactions between computers and human (natural) languages, in particular how to program computers to process and analyze large amounts of natural language data. Challenges in natural language processing frequently involve speech recognition, natural language understanding, and natural language generation. -

NLP APIs

Natural Language Processing APIs assist developers in extracting and analyzing natural language within articles and words to determine sentiment, intent, entities, and more.

In this blog post, we'll go over the top NLP APIs available on RapidAPI's marketplace and review their available API endpoints and pricing.

What is the best natural language processing API?

After reviewing over 53 natural language processing APIs, we found these 7 APIs to be the very best and worth mentioning:

Our Top 7 Best NLP APIs for 2021

AylienBest for NLP, Information Retrieval & Machine LearningConnect to API
Text SummarizationBest for Text SummarizingConnect to API
Twinword Text Analysis BundleBest for All-around Text AnalysisConnect to API
IBM Watson AlchemyBest for Text & Sentiment AnalysisConnect to API
RxNLPBest for Texting Mining & NLPConnect to API
LinguakitBest for Analyzing and Extracting TextConnect to API
Geneea Interpretor NLPBest for NLP, Sentiment Analysis & MoreConnect to API

Our Top Picks for Best NLP APIs

1. Aylien

AYLIEN Text API is a package of Natural Language Processing, Information Retrieval and Machine Learning tools that allow developers to extract meaning and insights from documents with ease.

See the demo here.

Aylien

Popularity Score: 9.4/10
Best For
NLP, Information Retrieval & Machine Learning


Connect to API

2. Text Summarization

Text Summarization API provides a professional text summarizer service which is based on advanced Natural Language Processing and Machine Learning technologies.

It can be used to summarize short important texts from the URLs or documents users provide. Test the automatic text summarization service here.

Text Summarization

Popularity Score: 9.3/10
Best For
Text Summarizing


Connect to API

3. Twinword Text Analysis Bundle

One API for all your text analysis needs. Sentiment Analysis, Topic Tagging, Lemmatizer, and much more. Various NLP tools all with one plan. Use natural language processing to analyze and understand human sentences.

Included APIs

  1. Word Associations

  2. Sentiment Analysis

  3. Topic Tagging

  4. Text Classification

  5. Category Recommendation

  6. Lemmatizer

  7. Language Scoring

  8. Word Dictionary

  9. Visual Context Graph

  10. Word Quiz

  11. Text Similarity

Twinword Text Analysis Bundle

Popularity Score: 8.9/10
Best For
All-around Text Analysis


Connect to API

4. IBM Watson Alchemy

Connect to the IBM Watson Alchemy API to analyze text for sentiment, keywords and broader concepts. Test an Alchemy API call and export the code snippet today.

How to get credentials:

  1. Go to AlchemyAPI and register your app
  2. Choose Natural Language Understanding from categories
  3. Connect Natural Language Understanding to your application at the left side, choose pricing plan and click on 'Create' button at the bottom of the page.
  4. Click on 'Service Credentials' tab to see your apiKey.
IBM Watson Alchemy

Popularity Score: 7.3/10
Best For
Text & Sentiment Analysis


Connect to API

5. RxNLP

Generate word & n-gram counts, compute text similarity, extract topics (keywords) from text , cluster sentences, extract text from HTML pages, summarize opinions.

RxNLP

Popularity Score: 8.6/10
Best For
Texting Mining & NLP


Connect to API

6. Linguakit

Linguakit API (formerly CilenisAPI) helps you analyze and extract information from texts.

Add language technology to your software in a few minutes using this cloud solution. The API offers technology based on years of research in Natural Language Processing in a very easy and scalable SaaS model trough a RESTful API.

Linguakit

Popularity Score: 7.7/10
Best For
Analyzing and Extracting Text


Connect to API

7. Geneea Interpretor NLP

Geneea Interpretor NLP API is a natural language processing API that allows for:

  • language analysis
  • named entity recognition
  • tagging
  • relation analysis
  • sentiment analysis
  • and text extraction.

Learn more here.

Geneea Interpretor NLP

Popularity Score: 6.3/10
Best For
NLP, Sentiment Analysis & More


Connect to API

FAQ

Related Resources

5/5 - (5 votes)

Complete List of the Best NLP APIs

  • Genea Interpretor NLP
  • Analyze NLP - State-of-the-art Natural Language Processing for text, documents and web pages
  • Text Analysis - AYLIEN Text API is a package of Natural Language Processing, Information Retrieval and Machine Learning tools that allow developers to extract meaning and insights from documents with ease.
  • Text Summarization - Text Summarization API provides professional text summarizer service which is based on advanced Natural Language Processing and Machine Learning technologies. It can be used to summarize short important text from the URL or document that user provided. If you want test our automatic text summarization service, you can use our free automatic
  • Twinword Text Analysis Bundle - One API for all your text analysis needs. Sentiment Analysis, Topic Tagging, Lemmatizer, and much more. Various NLP tools all with one plan. Use natural language processing to analyze and understand human sentences.
  • Microsoft Text Analytics - The Text Analytics API is a suite of text analytics web services built with best-in-class Microsoft machine learning algorithms. The API can be used to analyze unstructured text for tasks such as sentiment analysis, key phrase extraction and language detection. No training data is needed to use this API; just bring your text data. This API uses advanced natural language processing techniques to deliver best in class predictions.
  • Keywords Extraction - This API uses advanced Natural Language Processing techniques to extract the most important 'Keywords' and 'Phrases' from a LIST of text or URL that you provide. Useful for SEOs.
  • Text Mining and NLP - Generate word & n-gram counts, compute text similarity, extract topics (keywords) from text , cluster sentences, extract text from HTML pages, summarize opinions.
  • Keyword Extraction - Keyword Extraction API provides professional keyword extractor service which is based on advanced Natural Language Processing and Machine Learning technologies. It can be used to extract topn important keywords from the URL or document that user provided.
  • Natural Language to SQL - Natural Language User Interface to Database API, which allows End Users to request information from database using only Natural Language
  • Summarization -Index -Summary -Part of Speech - Summarize the content of a web page. Returns a summary, the parts of speech for each sentence, the extracted HTML, and the content make up of the page.
  • TextAnalysis - TextAnalysis API provides customized Text Analysis,Text Mining and Text Processing Services like Text Summarization, Language Detection, Text Classification, Sentiment Analysis, Word Tokenize, Part-of-Speech(POS) Tagging, Named Entity Recognition(NER), Stemmer, Lemmatizer, Chunker, Parser, Key Phrase Extraction(Noun Phrase Extraction), Sentence Segmentation(Sentence Boundary Detection), Grammar Checker and other Text Analysis Tasks.
  • Jeannie - Jeannie (Voice Actions) is a virtual assistant with over three million downloads, now also available via API.
  • Question-Answering - The WebKnox question-answering API allows you to find answers to natural language questions. These questions can be factual such as "What is the capital of Australia" or more complex.
  • Linguakit - Natural Language Processing in the cloud - Linguakit API (formerly CilenisAPI) helps you to analyze and extract information from texts. Add language technology to your software in a few minutes using our cloud solution. We offer you technology based on years of research in Natural Language Processing in a very easy and scalable SaaS model trough a RESTful API.
  • Macgyver - Macgyver hosts the largest library of machine learning algorithm programs.
  • Topics Extraction - Topics Extraction tags locations, people, companies, dates and many other elements appearing in a text written in Spanish, English, French, Italian, Portuguese or Catalan. This detection process is carried out by combining a number of complex natural language processing techniques that allow to obtain morphological, syntactic and semantic analyses of a text and use them to identify different types of significant elements.
  • AlchemyText - Analyze text for sentiment and broader concepts.
  • Sentiment Analysis - Multilingual sentiment analysis of texts from different sources (blogs, social networks,…). Besides polarity at sentence and global level, Sentiment Analysis uses advanced natural language processing techniques to also detect the polarity associated to both entities and concepts in the text. Sentiment Analysis also gives the user the possibility of detecting the polarity of user-defined entities and concepts, making the service a flexible tool applicable to any kind of scenario. Additionally, Sentiment Analysis detects if the text processed is subjective or objective and if it contains irony marks [beta], both at global and sentence level, giving the user additional information about the reliability of the polarity obtained from the sentiment analysis.
  • Malay Language NLP - Mesolitica's NLP-as-a-Service for Malay language
  • ApiAI - Build intelligent natural language bots powered by AI.
  • Natural Language Processing - Understanding - Personality Analysis - Tone - Intent - This API provides text analysis for Tone, Sentiment, Summarization, Personality Analysis, and more.
  • clinicalText - Classify clinical documents.
  • Natural Language Understanding - Ambiverse Natural Language Understanding API extracts entities from unstructured text, enabling a more precise transformation of texts into actionable, measurable, and easily accessible knowledge. Entities are identified by types such as person, location, organization, or product, and linked to the Wikipedia-derived YAGO knowledge graph. You can query the knowledge graph to obtain further information about these entities, such as Wikipedia links, textual descriptions, images, and lists of relevant categories.
  • Meanings Preview - Natural language processing. Language detection, accurate complex sentiment detection… BE AWARE: The first request may have a non negligible latency. After this first request, it will run like a charm.
  • IBMWatsonNLC - Interpret natural language with custom classifiers.
  • NLP and Voice interface for Apps wit.ai - Wit.ai enables developers to build apps and devices that users can talk to.
  • Free stopwords - StopwordAPI.com offers an easy solution for you to retrive words that you want to remove from a string. This filtering process is common in NLP (Natural Language Processing) algoritms and whenever you want to remove words from user input in your software application. StopwordAPI.com has ordered the words into useful categories making it easy for you to only download the words you need - eventhough you do not know the language.
  • igo.gram - Natural Language Processing, Audio Feature Extraction, Content-based image retrieval, Machine Learning, Text Analysis, Baper Engine, Face Recognition, Kamus Bahasa Gaul, etc.
  • Reminders And Events NLP - Entity extraction using AI from reminder and date/time natural language queries
  • Human Like Sentiment Analysis for Hotel Reviews - The Next-generation of Sentiment Analysis, Keywords, Topics and Categories. 124 Semantic models designed especially for hotel reviews. With this unique approach, we cover more than 90% of information/facts contained within the review. Testing it on hundreds of thousands of reviews, we achieved very high accuracy (precision=95%) We call it Human-like Analysis because with these parameters we achieve the same quality as detected by skilled analysts (humans). It opens up a lot of new functionalities that can be easily combined with your product without any post-processing, additional training or configuration to your data. To learn more what can be done with this technology, visit our webiste: http://unicornnlp.com/?solutions-in-travel
  • TextAPI - A text extraction, manipulation, and analysis api. Putting the power of natural language processing (nlp) in every developers hands.
  • Semantic Role Labeling - Semantic role labeling, sometimes also called shallow semantic parsing, is a task in natural language processing consisting of the detection of the semantic arguments associated with the predicate or verb of a sentence and their classification into their specific roles.
  • Intellexer Natural Language Processing and Text Mining - Intellexer API includes natural language processing solutions for sentiment analysis, named entity recognition, summarization, keywords extraction, document comparison, file conversion, natural language interface for search engines, language detection, spell-checking, article and concepts extraction, etc.
  • Language Identifier - Detects 170 + natural languages
  • NLP Translation - High Quality Neural Machine Translation/Translator API supported 110 languages. HTML translation is fully supported. Featured with Protected Words and Multiple Destination Languages in a single request. And of course we have a reasonable pricing.
  • Text Processing - The WebKnox text processing API lets you process (natural) language texts. You can detect the text's language, the quality of the writing, find entity mentions, tag part-of-speech, extract dates, extract locations, or determine the sentiment of the text.
  • Text Entity Info NLP - Analyze Text extract mentions, entities, aliases, and deep info
  • Diffbot - Diffbot extracts data from web pages automatically and returns structured JSON. For example, our Article API returns an article's title, author, date and full-text. Use the web as your database!
  • Siri - "Siri as a service"
  • Microserv.io NLP Service - Implements several basic Natural Language Processing functions.
  • Recipe Search and Diet - Since we understand the recipe – ingredients, diets, allergies, nutrition, taste, techniques & more. We can connect your users with the best recipes available for their unique food preferences.
  • Text Document Extract - Extract text and layout from document for NLP, data mining, page rank, etc
  • WitAI - Build an AI-powered bot that talks like a human.
  • SEC Refinery - Parretir's SEC Refinery API provides cleanly parsed full plain text from SEC filings.
  • Greek Pos Tag - Greek Pos Tag is an api that analyses Greek text and tags its parts of speech. It is created with NlpTools (http://php-nlp-tools.com) .
  • Turbo NLP - Your Swiss army knife for NLP! Text summarization, sentiment check, text readability analysis, named entity extraction, segmentation, tokenization, SEO slug creation and much more.
  • NLP as a Service - Inspirata is proud to announce that our proven AI/NLP engine is now available as a software service. This is the technology that is used by major cancer centers, hospitals and research facilities in the USA, Canada and Australia.
  • Algorithmia: nlp/SentimentAnalysis - Determine positive or negative sentiment from text
  • Textrator NLP - You can perform high quality natural language processing (NLP) including:
  • NLP - Some NLP API's
  • NLP for Radiology Reports - Maps radiology reports to SNOMED-CT and ICD-9 coding. More coding and file input options coming soon!
  • IBMWatsonPersonalityInsights - Extract a range of personality attributes from text.

Team RapidAPI

Reader Interactions

Comments

  1. Amnon Meyers says

    Hi,
    I’ve sent you information about the VisualText IDE for NLP, as well as the NLP++ programming language, the only such language developed specifically for NLP. These were developed and have been in use for 20 years, and have been used by customers including IBM, NASDAQ, and ETS. The courtesy of a reference on your page, or at the very least a reply, is much appreciated.
    Best regards,
    Amnon Meyers
    PS These properties are currently owned by Conceptual Systems, LLC, a California company, of which I am CEO.

    Reply

  2. Yakov Keselman says

    I’ve used dandelion.eu in the past with good results. I’m not associated with them in any way. Please take a look at them as well. Thanks!

    Reply

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