AllenNLP

AllenNLP is an open-source Python library built on PyTorch for natural language processing tasks. It provides pre-built models and tools for common NLP work including information extraction, sentiment analysis, and text generation. The library is designed for researchers and practitioners who want to build NLP systems without starting from scratch. It includes pretrained models you can use immediately, as well as building blocks for creating custom models. AllenNLP sits between simple off-the-shelf tools and building everything yourself, offering both convenience and flexibility. The freemium model means you can experiment with core functionality at no cost, with commercial support available for teams that need it.