---
title: openNLP Reviews
meta_title: 'openNLP Reviews 2026: Details, Pricing, & Features | G2'
meta_description: Filter 11 reviews by the users' company size, role or industry to
  find out how openNLP works for a business like yours.
aggregate_rating:
  rating_value: 4.0
  review_count: 11
  scale: '5'
date_modified: '2026-07-07'
parent_category:
  name: Natural Language Processing (NLP)
  url: https://www.g2.com/categories/natural-language-processing-nlp
---

# openNLP Reviews
**Vendor:** The Apache Software Foundation  
**Category:** [Natural Language Understanding (NLU) Software](https://www.g2.com/categories/natural-language-understanding-nlu)  
**Average Rating:** 4.0/5.0  
**Total Reviews:** 11
## About openNLP
Apache OpenNLP library is a machine learning based toolkit for the processing of natural language text that supports the common NLP tasks, such as tokenization, sentence segmentation, part-of-speech tagging, named entity extraction, chunking, parsing, and coreference resolution these tasks are usually required to build more advanced text processing services and includes maximum entropy and perceptron based machine learning.





## openNLP Discussions
  - [What is openNLP used for?](https://www.g2.com/discussions/what-is-opennlp-used-for)

- [View openNLP pricing details and edition comparison](https://www.g2.com/products/opennlp/reviews?page=2&section=pricing&secure%5Bexpires_at%5D=2026-08-01+13%3A17%3A56+-0500&secure%5Bsession_id%5D=f3cad73e-71c5-4173-a7de-2ced2cac2be8&secure%5Btoken%5D=9ccdcfc385c840abc1d04edfcc501dcb321251ac324f5169479039aa76422216&format=llm_user)

## openNLP Features
**Algorithm**
- Part of Speech Tagging
- Summarization
- Named Entity Recognition
- Sentiment Analysis
- Emotion Detection
- Language Detection

**System**
- Data Ingestion & Wrangling
- Programming Language Support
- Drag and Drop
- Pre-Built Algorithms
- Customizable Models

## Top openNLP Alternatives
  - [NLTK](https://www.g2.com/products/nltk/reviews) - 4.4/5.0 (46 reviews)
  - [Stanford CoreNLP](https://www.g2.com/products/stanford-corenlp/reviews) - 4.3/5.0 (10 reviews)
  - [Amazon Comprehend](https://www.g2.com/products/amazon-comprehend/reviews) - 4.3/5.0 (83 reviews)