---
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: '2026-08-07'
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 Reviews
  ### 1. A good tool for Text ML tasks

**Rating:** 4.0/5.0 stars

**Reviewed by:** Verified User in Higher Education | Enterprise (> 1000 emp.)

**Reviewed Date:** February 28, 2019

**What do you like best about openNLP?**

Was working on a basic question-answering system using basic NLP methods compared to the Neural Nets. OpenNLP made my process much simpler with its wide variety of functions that are easy to use and when in trouble there is always an easily accessible documentation which is well written to cover almost all the possible general errors.

**What do you dislike about openNLP?**

The NER Tagger and POS tagger are very different when compared to the other packages like spaCy and NLTK, which sometimes makes it harder to compare the outputs over certain categories.

**What problems is openNLP solving and how is that benefiting you?**

Mainly using it for my research and academic coursework and projects.

  ### 2. Great for NLP

**Rating:** 3.5/5.0 stars

**Reviewed by:** Verified User in Oil & Energy | Small-Business (50 or fewer emp.)

**Reviewed Date:** March 05, 2019

**What do you like best about openNLP?**

Supports main NLP tasks such as tokenization and parsing etc. Easy to build something fast and especially easy to install. Documentation is fair.

**What do you dislike about openNLP?**

I would definitely go with Spacy as it is more production focused and some of the tools of OpenNLP are not the most advanced. However, it is not so deep as NLTK and its API is not my favorite.

**What problems is openNLP solving and how is that benefiting you?**

Text classification 

  ### 3. Easy to use

**Rating:** 3.5/5.0 stars

**Reviewed by:** Verified User in Education Management | Small-Business (50 or fewer emp.)

**Reviewed Date:** January 26, 2019

**What do you like best about openNLP?**

Advanced Features,
Open Source
Free
Can build a full NLP Pipeline


**What do you dislike about openNLP?**

With any of its features, it produces high accuracy but also at the same time has false negatives.

**Recommendations to others considering openNLP:**

It has multiple features and a great ML tool 

**What problems is openNLP solving and how is that benefiting you?**

Used it for Tokenization. POS Tagger


## 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?filters%5Bnps_score%5D%5B%5D=4&section=pricing&secure%5Bexpires_at%5D=2026-08-13+19%3A16%3A16+-0500&secure%5Bsession_id%5D=d623bdfd-2d4c-4db7-a87a-6ef3fe9c08d7&secure%5Btoken%5D=f0f94cddff73a083613573bbef6711a165bcf062b43b3852ceacf10fe95eeb3b&format=llm_user)

## openNLP Features
**Additional Functionality**
- Tagging
- Natural Language Processing
- Data Extraction
- Multi-Language
- Predictive Analytics
- Drag & Drop
- Speech Recognition
- Reporting/Analytics
- Data Storage Management
- Virtual Personal Assistant (VPA)
- AI Copilot
- Customer Segmentation
- Collaboration Tools
- Data Import/Export
- Generative AI
- For eCommerce
- Role-Based Permissions
- Customizable Branding
- Search/Filter
- Monitoring
- Document Management
- API
- Data Visualization
- Trend Analysis
- Machine Learning
- Access Controls/Permissions
- Alerts/Escalation
- Performance Metrics
- Real-Time Data
- Third-Party Integrations
- Mobile App
- Multiple Data Sources
- For Sales Teams/Organizations
- Sentiment Analysis
- Activity Dashboard
- Chatbot
- Workflow Automation

**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)